Common Weakness Enumeration
CWE-626
AllowedNull Byte Interaction Error (Poison Null Byte)
Abstraction: Variant · Status: Draft
The product does not properly handle null bytes or NUL characters when passing data between different representations or components.
11 vulnerabilities reference this CWE, most recent first.
CVE-2026-76816 (GCVE-0-2026-76816)
Vulnerability from cvelistv5 – Published: 2026-08-24 19:53 – Updated: 2026-08-24 19:53
VLAI
EPSS
VEX
Title
Netty: MQTT Topic Name and Client ID Validation Bypass
Summary
Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.137.Final and 4.2.17.Final, MqttEncoder does not validate client identifiers, will topics, usernames, and PUBLISH topic names before encoding, allowing prohibited null bytes in MQTT UTF-8 string fields and potentially causing routing, access-control, or identity mismatches in downstream brokers. The vulnerability is exploitable when an application uses Netty's MQTT encoder to construct messages from user-controlled input. This issue is fixed in versions 4.1.137.Final and 4.2.17.Final.
Severity
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/netty/netty/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/netty/netty/commit/1b5abc6443b… | x_refsource_MISC |
| https://github.com/netty/netty/commit/9e051923910… | x_refsource_MISC |
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"product": "netty",
"vendor": "netty",
"versions": [
{
"status": "affected",
"version": "\u003e= 4.2.0.Final, \u003c 4.1.137.Final"
},
{
"status": "affected",
"version": "\u003c 4.1.137.Final"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.137.Final and 4.2.17.Final, MqttEncoder does not validate client identifiers, will topics, usernames, and PUBLISH topic names before encoding, allowing prohibited null bytes in MQTT UTF-8 string fields and potentially causing routing, access-control, or identity mismatches in downstream brokers. The vulnerability is exploitable when an application uses Netty\u0027s MQTT encoder to construct messages from user-controlled input. This issue is fixed in versions 4.1.137.Final and 4.2.17.Final."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "NONE",
"baseScore": 3.5,
"baseSeverity": "LOW",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-20",
"description": "CWE-20: Improper Input Validation",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-626",
"description": "CWE-626: Null Byte Interaction Error (Poison Null Byte)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-24T19:53:12.737Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/netty/netty/security/advisories/GHSA-43fm-7cxg-hf3j",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/netty/netty/security/advisories/GHSA-43fm-7cxg-hf3j"
},
{
"name": "https://github.com/netty/netty/commit/1b5abc6443b63726c72cdd285af2feb7ddbb8ff7",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/netty/netty/commit/1b5abc6443b63726c72cdd285af2feb7ddbb8ff7"
},
{
"name": "https://github.com/netty/netty/commit/9e0519239108a69b7e9bbc5e9182ee139a0d7961",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/netty/netty/commit/9e0519239108a69b7e9bbc5e9182ee139a0d7961"
}
],
"source": {
"advisory": "GHSA-43fm-7cxg-hf3j",
"discovery": "UNKNOWN"
},
"title": "Netty: MQTT Topic Name and Client ID Validation Bypass"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-76816",
"datePublished": "2026-08-24T19:53:12.737Z",
"dateReserved": "2026-08-19T19:52:28.213Z",
"dateUpdated": "2026-08-24T19:53:12.737Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-62380 (GCVE-0-2026-62380)
Vulnerability from cvelistv5 – Published: 2026-08-22 12:26 – Updated: 2026-08-22 12:26
VLAI
EPSS
VEX
Title
Netty before 4.2.16.Final SOCKS Proxy Null Byte Injection
Summary
Netty (io.netty:netty-codec-socks) versions 4.2.0.Final through 4.2.16.Final and 4.1.x through 4.1.136.Final contain null byte, CRLF, and credential injection vulnerabilities in the SOCKS4 (Socks4ClientEncoder) and SOCKS5 (Socks5ClientEncoder) client encoders, which fail to validate domain address and authentication (username/password) fields. An attacker able to control these fields can inject null bytes or CRLF characters to truncate or alter values, potentially enabling domain spoofing, SOCKS4 userid truncation, authentication data injection, and protocol confusion. Fixed in 4.2.17.Final and 4.1.137.Final.
Severity
CWE
- CWE-626 - Null Byte Interaction Error (Poison Null Byte)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/netty/netty/security/advisorie… | vendor-advisory |
| https://www.vulncheck.com/advisories/netty-before… | third-party-advisory |
Impacted products
Date Public
2026-08-07 00:00
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"packageURL": "pkg:maven/io.netty/netty-codec-socks",
"product": "netty",
"vendor": "netty",
"versions": [
{
"lessThan": "4.2.16.Final",
"status": "affected",
"version": "4.2.0.Final",
"versionType": "custom"
},
{
"status": "unaffected",
"version": "4.2.16.Final",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unaffected",
"packageURL": "pkg:maven/io.netty/netty-codec-socks",
"product": "netty",
"vendor": "netty",
"versions": [
{
"lessThan": "4.1.137.Final",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"status": "unaffected",
"version": "4.1.137.Final",
"versionType": "custom"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*",
"versionEndExcluding": "4.2.16.final",
"versionStartIncluding": "4.2.0.final",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*",
"versionEndExcluding": "4.1.137.final",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"datePublic": "2026-08-07T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "Netty (io.netty:netty-codec-socks) versions 4.2.0.Final through 4.2.16.Final and 4.1.x through 4.1.136.Final contain null byte, CRLF, and credential injection vulnerabilities in the SOCKS4 (Socks4ClientEncoder) and SOCKS5 (Socks5ClientEncoder) client encoders, which fail to validate domain address and authentication (username/password) fields. An attacker able to control these fields can inject null bytes or CRLF characters to truncate or alter values, potentially enabling domain spoofing, SOCKS4 userid truncation, authentication data injection, and protocol confusion. Fixed in 4.2.17.Final and 4.1.137.Final."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "LOW",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
},
"format": "CVSS"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-626",
"description": "Null Byte Interaction Error (Poison Null Byte)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-22T12:26:43.777Z",
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck"
},
"references": [
{
"name": "GitHub Security Advisory (GHSA-cc6x-ffm5-83wf)",
"tags": [
"vendor-advisory"
],
"url": "https://github.com/netty/netty/security/advisories/GHSA-cc6x-ffm5-83wf"
},
{
"name": "VulnCheck Advisory: Netty before 4.2.16.Final SOCKS Proxy Null Byte Injection",
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/netty-before-final-socks-proxy-null-byte-injection"
}
],
"title": "Netty before 4.2.16.Final SOCKS Proxy Null Byte Injection",
"x_generator": {
"engine": "vulncheck-endgame"
}
}
},
"cveMetadata": {
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"assignerShortName": "VulnCheck",
"cveId": "CVE-2026-62380",
"datePublished": "2026-08-22T12:26:43.777Z",
"dateReserved": "2026-07-13T22:40:54.411Z",
"dateUpdated": "2026-08-22T12:26:43.777Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-42579 (GCVE-0-2026-42579)
Vulnerability from cvelistv5 – Published: 2026-05-13 18:01 – Updated: 2026-08-21 12:13
VLAI
EPSS
VEX
Title
Netty: DNS Codec Input Validation Bypass in Netty (Encoder + Decoder)
Summary
Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty's DNS codec does not enforce RFC 1035 domain name constraints during either encoding or decoding. This creates a bidirectional attack surface: malicious DNS responses can exploit the decoder, and user-influenced hostnames can exploit the encoder. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-18 15:39 UTC
CWE
Assigner
References
13 references
Impacted products
38 products
| Vendor | Product | Version | |
|---|---|---|---|
| netty | netty |
Affected:
>= 4.2.0.Alpha1, < 4.2.13.Final
Affected: < 4.1.133.Final |
|
| Red Hat | Cryostat 4 on RHEL 9 |
Unaffected:
4.2.0-10 , < *
(rpm)
cpe:/a:redhat:cryostat:4::el9 |
|
| Red Hat | Red Hat build of Apache Camel 4.18.1.P1 for Spring Boot 3.5.16 |
Unaffected:
codec-dns , < *
(rpm)
cpe:/a:redhat:apache_camel_spring_boot:4.18 |
|
| Red Hat | Red Hat build of Quarkus 3.27.4 |
Unaffected:
codec-dns , < *
(rpm)
cpe:/a:redhat:quarkus:3.27::el8 |
|
| Red Hat | Red Hat build of Quarkus 3.33.2 |
cpe:/a:redhat:quarkus:3.33::el8
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 7.4.25 |
Unaffected:
codec-dns , < *
(rpm)
cpe:/a:redhat:jboss_enterprise_application_platform:7.4::el7 |
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 |
Unaffected:
0:2.16.0-22.redhat_00057.1.el7eap , < *
(rpm)
cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7 |
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 |
Unaffected:
0:2.3.14-11.SP11_redhat_00001.1.el7eap , < *
(rpm)
cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7 |
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 |
Unaffected:
0:1.5.26-2.Final_redhat_00001.1.el7eap , < *
(rpm)
cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7 |
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 |
Unaffected:
0:2.18.8-1.redhat_00003.1.el7eap , < *
(rpm)
cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7 |
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 |
Unaffected:
0:5.0.31-3.SP2_redhat_00001.1.el7eap , < *
(rpm)
cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7 |
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 |
Unaffected:
0:1.10.0-46.Final_redhat_00044.1.el7eap , < *
(rpm)
cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7 |
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 |
Unaffected:
0:4.1.135-1.Final_redhat_00001.1.el7eap , < *
(rpm)
cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7 |
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 |
Unaffected:
0:2.5.5-30.SP12_redhat_00020.1.el7eap , < *
(rpm)
cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7 |
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 |
Unaffected:
0:2.5.5-24.SP12_redhat_00016.1.el7eap , < *
(rpm)
cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7 |
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 |
Unaffected:
0:2.2.40-2.SP3_redhat_00001.1.el7eap , < *
(rpm)
cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7 |
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 |
Unaffected:
0:7.4.25-2.GA_redhat_00001.1.el7eap , < *
(rpm)
cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7 |
|
| Red Hat | Streams for Apache Kafka 3.2.1 |
Unaffected:
codec-dns , < *
(rpm)
cpe:/a:redhat:amq_streams:3.2::el9 |
|
| Red Hat | Red Hat OpenShift Dev Spaces 3.28 |
Unaffected:
1780948325 , < *
(rpm)
cpe:/a:redhat:openshift_devspaces:3.28::el9 |
|
| Red Hat | Red Hat OpenShift Dev Spaces 3.28 |
Unaffected:
1780696380 , < *
(rpm)
cpe:/a:redhat:openshift_devspaces:3.28::el9 |
|
| Red Hat | Red Hat OpenShift Dev Spaces 3.28 |
Unaffected:
1780694994 , < *
(rpm)
cpe:/a:redhat:openshift_devspaces:3.28::el9 |
|
| Red Hat | Red Hat OpenShift Dev Spaces 3.29 |
Unaffected:
1782989027 , < *
(rpm)
cpe:/a:redhat:openshift_devspaces:3.29::el9 |
|
| Red Hat | OpenShift Serverless |
cpe:/a:redhat:serverless:1
|
|
| Red Hat | Red Hat build of Apache Camel 4 for Quarkus 3 |
cpe:/a:redhat:camel_quarkus:3
|
|
| Red Hat | Red Hat build of Apicurio Registry 2 |
cpe:/a:redhat:service_registry:2
|
|
| Red Hat | Red Hat build of Apicurio Registry 3 |
cpe:/a:redhat:apicurio_registry:3
|
|
| Red Hat | Red Hat build of Debezium 3 |
cpe:/a:redhat:debezium:3
|
|
| Red Hat | Red Hat Build of Keycloak |
cpe:/a:redhat:build_keycloak:
|
|
| Red Hat | Red Hat build of OptaPlanner 8 |
cpe:/a:redhat:optaplanner:::el6
|
|
| Red Hat | Red Hat Data Grid 8 |
cpe:/a:redhat:jboss_data_grid:8
|
|
| Red Hat | Red Hat Enterprise Linux AI (RHEL AI) 3 |
cpe:/a:redhat:enterprise_linux_ai:3
|
|
| Red Hat | Red Hat Fuse 7 |
cpe:/a:redhat:jboss_fuse:7
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 8 |
cpe:/a:redhat:jboss_enterprise_application_platform:8
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack |
cpe:/a:redhat:jbosseapxp
|
|
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai
|
|
| Red Hat | Red Hat Process Automation 7 |
cpe:/a:redhat:jboss_enterprise_bpms_platform:7
|
|
| Red Hat | Red Hat Single Sign-On 7 |
cpe:/a:redhat:red_hat_single_sign_on:7
|
|
| Red Hat | streams for Apache Kafka 2 |
cpe:/a:redhat:amq_streams:2
|
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-42579",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-18T15:39:59.449891Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-05-18T15:40:22.534Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/netty/netty/security/advisories/GHSA-cm33-6792-r9fm"
}
],
"title": "CISA ADP Vulnrichment"
},
{
"affected": [
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:cryostat:4::el9"
],
"defaultStatus": "affected",
"packageName": "cryostat/cryostat-reports-rhel9",
"product": "Cryostat 4 on RHEL 9",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "4.2.0-10",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:cryostat:4::el9"
],
"defaultStatus": "affected",
"packageName": "cryostat/cryostat-rhel9",
"product": "Cryostat 4 on RHEL 9",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "4.2.0-10",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:cryostat:4::el9"
],
"defaultStatus": "affected",
"packageName": "cryostat/jfr-datasource-rhel9",
"product": "Cryostat 4 on RHEL 9",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "4.2.0-10",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:apache_camel_spring_boot:4.18"
],
"defaultStatus": "affected",
"packageName": "netty",
"product": "Red Hat build of Apache Camel 4.18.1.P1 for Spring Boot 3.5.16",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "codec-dns",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:quarkus:3.27::el8"
],
"defaultStatus": "affected",
"packageName": "netty",
"product": "Red Hat build of Quarkus 3.27.4",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "codec-dns",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:quarkus:3.33::el8"
],
"defaultStatus": "unaffected",
"product": "Red Hat build of Quarkus 3.33.2",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:jboss_enterprise_application_platform:7.4::el7"
],
"defaultStatus": "affected",
"packageName": "netty",
"product": "Red Hat JBoss Enterprise Application Platform 7.4.25",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "codec-dns",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7"
],
"defaultStatus": "affected",
"packageName": "eap7-activemq-artemis",
"product": "Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:2.16.0-22.redhat_00057.1.el7eap",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7"
],
"defaultStatus": "affected",
"packageName": "eap7-glassfish-jsf",
"product": "Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:2.3.14-11.SP11_redhat_00001.1.el7eap",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7"
],
"defaultStatus": "affected",
"packageName": "eap7-ironjacamar",
"product": "Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:1.5.26-2.Final_redhat_00001.1.el7eap",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7"
],
"defaultStatus": "affected",
"packageName": "eap7-jackson-annotations",
"product": "Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:2.18.8-1.redhat_00003.1.el7eap",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7"
],
"defaultStatus": "affected",
"packageName": "eap7-jackson-core",
"product": "Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:2.18.8-1.redhat_00003.1.el7eap",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7"
],
"defaultStatus": "affected",
"packageName": "eap7-jackson-databind",
"product": "Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:2.18.8-1.redhat_00003.1.el7eap",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7"
],
"defaultStatus": "affected",
"packageName": "eap7-jackson-jaxrs-providers",
"product": "Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:2.18.8-1.redhat_00003.1.el7eap",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7"
],
"defaultStatus": "affected",
"packageName": "eap7-jackson-modules-base",
"product": "Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:2.18.8-1.redhat_00003.1.el7eap",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7"
],
"defaultStatus": "affected",
"packageName": "eap7-jackson-modules-java8",
"product": "Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:2.18.8-1.redhat_00003.1.el7eap",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7"
],
"defaultStatus": "affected",
"packageName": "eap7-jboss-remoting",
"product": "Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:5.0.31-3.SP2_redhat_00001.1.el7eap",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7"
],
"defaultStatus": "affected",
"packageName": "eap7-jboss-server-migration",
"product": "Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:1.10.0-46.Final_redhat_00044.1.el7eap",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7"
],
"defaultStatus": "affected",
"packageName": "eap7-netty",
"product": "Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:4.1.135-1.Final_redhat_00001.1.el7eap",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7"
],
"defaultStatus": "affected",
"packageName": "eap7-netty-transport-native-epoll",
"product": "Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:4.1.135-1.Final_redhat_00001.1.el7eap",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7"
],
"defaultStatus": "affected",
"packageName": "eap7-picketlink-bindings",
"product": "Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:2.5.5-30.SP12_redhat_00020.1.el7eap",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7"
],
"defaultStatus": "affected",
"packageName": "eap7-picketlink-federation",
"product": "Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:2.5.5-24.SP12_redhat_00016.1.el7eap",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7"
],
"defaultStatus": "affected",
"packageName": "eap7-undertow",
"product": "Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:2.2.40-2.SP3_redhat_00001.1.el7eap",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7"
],
"defaultStatus": "affected",
"packageName": "eap7-wildfly",
"product": "Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:7.4.25-2.GA_redhat_00001.1.el7eap",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:amq_streams:3.2::el9"
],
"defaultStatus": "affected",
"packageName": "netty",
"product": "Streams for Apache Kafka 3.2.1",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "codec-dns",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:openshift_devspaces:3.28::el9"
],
"defaultStatus": "affected",
"packageName": "devspaces/openvsx-rhel9",
"product": "Red Hat OpenShift Dev Spaces 3.28",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "1780948325",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:openshift_devspaces:3.28::el9"
],
"defaultStatus": "affected",
"packageName": "devspaces/pluginregistry-rhel9",
"product": "Red Hat OpenShift Dev Spaces 3.28",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "1780696380",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:openshift_devspaces:3.28::el9"
],
"defaultStatus": "affected",
"packageName": "devspaces/server-rhel9",
"product": "Red Hat OpenShift Dev Spaces 3.28",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "1780694994",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:openshift_devspaces:3.29::el9"
],
"defaultStatus": "affected",
"packageName": "devspaces/multicluster-redirector-rhel9",
"product": "Red Hat OpenShift Dev Spaces 3.29",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "1782989027",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:serverless:1"
],
"defaultStatus": "unknown",
"packageName": "openshift-serverless-1/kn-ekb-dispatcher-rhel9",
"product": "OpenShift Serverless",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:serverless:1"
],
"defaultStatus": "unknown",
"packageName": "openshift-serverless-1/kn-ekb-receiver-rhel9",
"product": "OpenShift Serverless",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:serverless:1"
],
"defaultStatus": "unknown",
"packageName": "openshift-serverless-1/kn-eventing-integrations-aws-ddb-streams-source-rhel9",
"product": "OpenShift Serverless",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:serverless:1"
],
"defaultStatus": "unknown",
"packageName": "openshift-serverless-1/kn-eventing-integrations-aws-s3-sink-rhel9",
"product": "OpenShift Serverless",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:serverless:1"
],
"defaultStatus": "unknown",
"packageName": "openshift-serverless-1/kn-eventing-integrations-aws-s3-source-rhel9",
"product": "OpenShift Serverless",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:serverless:1"
],
"defaultStatus": "unknown",
"packageName": "openshift-serverless-1/kn-eventing-integrations-aws-sns-sink-rhel9",
"product": "OpenShift Serverless",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:serverless:1"
],
"defaultStatus": "unknown",
"packageName": "openshift-serverless-1/kn-eventing-integrations-aws-sqs-sink-rhel9",
"product": "OpenShift Serverless",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:serverless:1"
],
"defaultStatus": "unknown",
"packageName": "openshift-serverless-1/kn-eventing-integrations-aws-sqs-source-rhel9",
"product": "OpenShift Serverless",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:serverless:1"
],
"defaultStatus": "unknown",
"packageName": "openshift-serverless-1/kn-eventing-integrations-log-sink-rhel9",
"product": "OpenShift Serverless",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:serverless:1"
],
"defaultStatus": "unknown",
"packageName": "openshift-serverless-1/kn-eventing-integrations-timer-source-rhel9",
"product": "OpenShift Serverless",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:camel_quarkus:3"
],
"defaultStatus": "unknown",
"packageName": "netty-codec-dns",
"product": "Red Hat build of Apache Camel 4 for Quarkus 3",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:service_registry:2"
],
"defaultStatus": "unknown",
"packageName": "netty-codec-dns",
"product": "Red Hat build of Apicurio Registry 2",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:apicurio_registry:3"
],
"defaultStatus": "unknown",
"packageName": "netty-codec-dns",
"product": "Red Hat build of Apicurio Registry 3",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:debezium:3"
],
"defaultStatus": "unknown",
"packageName": "netty-codec-dns",
"product": "Red Hat build of Debezium 3",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:build_keycloak:"
],
"defaultStatus": "unaffected",
"packageName": "netty-codec-dns",
"product": "Red Hat Build of Keycloak",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:build_keycloak:"
],
"defaultStatus": "unaffected",
"packageName": "rhbk/keycloak-rhel9",
"product": "Red Hat Build of Keycloak",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:build_keycloak:"
],
"defaultStatus": "affected",
"packageName": "rhbk/keycloak-rhel9-operator",
"product": "Red Hat Build of Keycloak",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:build_keycloak:"
],
"defaultStatus": "affected",
"packageName": "rhbk-openshift-rhel9/rhbk-openshift-rhel9",
"product": "Red Hat Build of Keycloak",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:build_keycloak:"
],
"defaultStatus": "unaffected",
"packageName": "rhbk-rhel9-operator/rhbk-rhel9-operator",
"product": "Red Hat Build of Keycloak",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:optaplanner:::el6"
],
"defaultStatus": "unknown",
"packageName": "netty-codec-dns",
"product": "Red Hat build of OptaPlanner 8",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:jboss_data_grid:8"
],
"defaultStatus": "unknown",
"packageName": "netty-codec-dns",
"product": "Red Hat Data Grid 8",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:enterprise_linux_ai:3"
],
"defaultStatus": "unknown",
"packageName": "bazel7",
"product": "Red Hat Enterprise Linux AI (RHEL AI) 3",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:enterprise_linux_ai:3"
],
"defaultStatus": "unknown",
"packageName": "bazel8",
"product": "Red Hat Enterprise Linux AI (RHEL AI) 3",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:jboss_fuse:7"
],
"defaultStatus": "unknown",
"packageName": "netty-codec-dns",
"product": "Red Hat Fuse 7",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:jboss_enterprise_application_platform:8"
],
"defaultStatus": "unknown",
"packageName": "netty-codec-dns",
"product": "Red Hat JBoss Enterprise Application Platform 8",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:jbosseapxp"
],
"defaultStatus": "unknown",
"packageName": "netty-codec-dns",
"product": "Red Hat JBoss Enterprise Application Platform Expansion Pack",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:openshift_ai"
],
"defaultStatus": "unknown",
"packageName": "rhoai/odh-spark-operator-rhel9",
"product": "Red Hat OpenShift AI (RHOAI)",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:openshift_ai"
],
"defaultStatus": "unknown",
"packageName": "rhoai/odh-th06-cpu-torch210-py312-rhel9",
"product": "Red Hat OpenShift AI (RHOAI)",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:openshift_ai"
],
"defaultStatus": "unknown",
"packageName": "rhoai/odh-th06-cpu-torch291-py312-rhel9",
"product": "Red Hat OpenShift AI (RHOAI)",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:openshift_ai"
],
"defaultStatus": "unknown",
"packageName": "rhoai/odh-th06-cuda130-torch210-py312-rhel9",
"product": "Red Hat OpenShift AI (RHOAI)",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:openshift_ai"
],
"defaultStatus": "unknown",
"packageName": "rhoai/odh-th06-cuda130-torch291-py312-rhel9",
"product": "Red Hat OpenShift AI (RHOAI)",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:openshift_ai"
],
"defaultStatus": "unknown",
"packageName": "rhoai/odh-th06-rocm64-torch291-py312-rhel9",
"product": "Red Hat OpenShift AI (RHOAI)",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:openshift_ai"
],
"defaultStatus": "unknown",
"packageName": "rhoai/odh-trustyai-service-rhel8",
"product": "Red Hat OpenShift AI (RHOAI)",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:openshift_ai"
],
"defaultStatus": "unknown",
"packageName": "rhoai/odh-trustyai-service-rhel9",
"product": "Red Hat OpenShift AI (RHOAI)",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:jboss_enterprise_bpms_platform:7"
],
"defaultStatus": "unknown",
"packageName": "netty-codec-dns",
"product": "Red Hat Process Automation 7",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:red_hat_single_sign_on:7"
],
"defaultStatus": "unknown",
"packageName": "netty-codec-dns",
"product": "Red Hat Single Sign-On 7",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:amq_streams:2"
],
"defaultStatus": "unaffected",
"packageName": "netty-codec-dns",
"product": "streams for Apache Kafka 2",
"vendor": "Red Hat"
}
],
"datePublic": "2026-05-13T18:01:52.500Z",
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in Netty. Netty\u0027s DNS (Domain Name System) codec does not properly enforce domain name constraints as defined in RFC 1035 during both encoding and decoding processes. This vulnerability allows a remote attacker to exploit the decoder using malicious DNS responses or exploit the encoder through user-influenced hostnames, leading to a high integrity impact on the affected system."
}
],
"metrics": [
{
"other": {
"content": {
"namespace": "https://access.redhat.com/security/updates/classification/",
"value": "Important"
},
"type": "Red Hat severity rating"
}
},
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"version": "3.1"
},
"format": "CVSS"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-1286",
"description": "Improper Validation of Syntactic Correctness of Input",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-21T12:13:05.995Z",
"orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"shortName": "redhat-SADP"
},
"references": [
{
"tags": [
"vdb-entry",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/security/cve/CVE-2026-42579"
},
{
"name": "RHBZ#2477217",
"tags": [
"issue-tracking",
"x_refsource_REDHAT"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2477217"
},
{
"tags": [
"x_sadp-csaf-vex"
],
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42579.json"
},
{
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2026:53644"
},
{
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2026:28010"
},
{
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2026:53806"
},
{
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2026:25123"
},
{
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2026:36820"
},
{
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2026:37390"
},
{
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2026:23808"
},
{
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2026:24502"
},
{
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2026:54435"
}
],
"solutions": [
{
"lang": "en",
"value": "RHSA-2026:53644: Red Hat JBoss EAP 7.4 ELS for RHEL 7 Server"
},
{
"lang": "en",
"value": "RHSA-2026:28010: Cryostat 4 on RHEL 9"
},
{
"lang": "en",
"value": "RHSA-2026:53806: Red Hat JBoss Enterprise Application Platform 7.4.25"
},
{
"lang": "en",
"value": "RHSA-2026:25123: Red Hat OpenShift Dev Spaces 3.28"
},
{
"lang": "en",
"value": "RHSA-2026:36820: Red Hat OpenShift Dev Spaces 3.29"
},
{
"lang": "en",
"value": "RHSA-2026:37390: Red Hat build of Apache Camel 4.18.1.P1 for Spring Boot 3.5.16"
},
{
"lang": "en",
"value": "RHSA-2026:23808: Red Hat build of Quarkus 3.27.4"
},
{
"lang": "en",
"value": "RHSA-2026:24502: Red Hat build of Quarkus 3.33.2"
},
{
"lang": "en",
"value": "RHSA-2026:54435: Streams for Apache Kafka 3.2.1"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-05-13T19:01:25.062Z",
"value": "Reported to Red Hat."
},
{
"lang": "en",
"time": "2026-05-13T18:01:52.500Z",
"value": "Made public."
}
],
"title": "netty: Netty: High integrity impact due to improper DNS domain name constraint enforcement",
"workarounds": [
{
"lang": "en",
"value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."
}
],
"x_adpType": "supplier",
"x_generator": {
"engine": "sadp-cli 1.0.0"
}
}
],
"cna": {
"affected": [
{
"product": "netty",
"vendor": "netty",
"versions": [
{
"status": "affected",
"version": "\u003e= 4.2.0.Alpha1, \u003c 4.2.13.Final"
},
{
"status": "affected",
"version": "\u003c 4.1.133.Final"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty\u0027s DNS codec does not enforce RFC 1035 domain name constraints during either encoding or decoding. This creates a bidirectional attack surface: malicious DNS responses can exploit the decoder, and user-influenced hostnames can exploit the encoder. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-20",
"description": "CWE-20: Improper Input Validation",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "CWE-400: Uncontrolled Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-626",
"description": "CWE-626: Null Byte Interaction Error (Poison Null Byte)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-13T18:01:52.500Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/netty/netty/security/advisories/GHSA-cm33-6792-r9fm",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/netty/netty/security/advisories/GHSA-cm33-6792-r9fm"
}
],
"source": {
"advisory": "GHSA-cm33-6792-r9fm",
"discovery": "UNKNOWN"
},
"title": "Netty: DNS Codec Input Validation Bypass in Netty (Encoder + Decoder)"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-42579",
"datePublished": "2026-05-13T18:01:52.500Z",
"dateReserved": "2026-04-28T17:26:12.085Z",
"dateUpdated": "2026-08-21T12:13:05.995Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-42040 (GCVE-0-2026-42040)
Vulnerability from cvelistv5 – Published: 2026-04-24 17:40 – Updated: 2026-04-27 13:48
VLAI
EPSS
VEX
Title
Axios: Null Byte Injection via Reverse-Encoding in AxiosURLSearchParams
Summary
Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, the encode() function in lib/helpers/AxiosURLSearchParams.js contains a character mapping (charMap) at line 21 that reverses the safe percent-encoding of null bytes. After encodeURIComponent('\x00') correctly produces the safe sequence %00, the charMap entry '%00': '\x00' converts it back to a raw null byte. Primary impact is limited because the standard axios request flow is not affected. This vulnerability is fixed in 1.15.1 and 0.31.1.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-27 13:48 UTC
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/axios/axios/security/advisorie… | x_refsource_CONFIRM |
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-42040",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-04-27T13:48:02.943460Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-04-27T13:48:06.659Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/axios/axios/security/advisories/GHSA-xhjh-pmcv-23jw"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "axios",
"vendor": "axios",
"versions": [
{
"status": "affected",
"version": "\u003e= 1.0.0, \u003c 1.15.1"
},
{
"status": "affected",
"version": "\u003c 0.31.1"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, the encode() function in lib/helpers/AxiosURLSearchParams.js contains a character mapping (charMap) at line 21 that reverses the safe percent-encoding of null bytes. After encodeURIComponent(\u0027\\x00\u0027) correctly produces the safe sequence %00, the charMap entry \u0027%00\u0027: \u0027\\x00\u0027 converts it back to a raw null byte. Primary impact is limited because the standard axios request flow is not affected. This vulnerability is fixed in 1.15.1 and 0.31.1."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 3.7,
"baseSeverity": "LOW",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-116",
"description": "CWE-116: Improper Encoding or Escaping of Output",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-626",
"description": "CWE-626: Null Byte Interaction Error (Poison Null Byte)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-04-24T17:40:31.125Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/axios/axios/security/advisories/GHSA-xhjh-pmcv-23jw",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/axios/axios/security/advisories/GHSA-xhjh-pmcv-23jw"
}
],
"source": {
"advisory": "GHSA-xhjh-pmcv-23jw",
"discovery": "UNKNOWN"
},
"title": "Axios: Null Byte Injection via Reverse-Encoding in AxiosURLSearchParams"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-42040",
"datePublished": "2026-04-24T17:40:31.125Z",
"dateReserved": "2026-04-23T16:05:01.709Z",
"dateUpdated": "2026-04-27T13:48:06.659Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2020-10773 (GCVE-0-2020-10773)
Vulnerability from cvelistv5 – Published: 2020-09-10 16:07 – Updated: 2024-08-04 11:14
VLAI
EPSS
VEX
Summary
A stack information leak flaw was found in s390/s390x in the Linux kernel’s memory manager functionality, where it incorrectly writes to the /proc/sys/vm/cmm_timeout file. This flaw allows a local user to see the kernel data.
Severity
4.4 (Medium)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2… | x_refsource_CONFIRM |
| https://git.kernel.org/pub/scm/linux/kernel/git/t… | x_refsource_MISC |
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T11:14:14.957Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10773"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b8e51a6a9db94bc1fb18ae831b3dab106b5a4b5f"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "kernel",
"vendor": "[UNKNOWN]",
"versions": [
{
"status": "affected",
"version": "kernel-5.4-rc6"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A stack information leak flaw was found in s390/s390x in the Linux kernel\u2019s memory manager functionality, where it incorrectly writes to the /proc/sys/vm/cmm_timeout file. This flaw allows a local user to see the kernel data."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 4.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-626",
"description": "CWE-626",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2020-09-10T16:07:48.000Z",
"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
"shortName": "redhat"
},
"references": [
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10773"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b8e51a6a9db94bc1fb18ae831b3dab106b5a4b5f"
}
],
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "secalert@redhat.com",
"ID": "CVE-2020-10773",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "kernel",
"version": {
"version_data": [
{
"version_value": "kernel-5.4-rc6"
}
]
}
}
]
},
"vendor_name": "[UNKNOWN]"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "A stack information leak flaw was found in s390/s390x in the Linux kernel\u2019s memory manager functionality, where it incorrectly writes to the /proc/sys/vm/cmm_timeout file. This flaw allows a local user to see the kernel data."
}
]
},
"impact": {
"cvss": [
[
{
"vectorString": "4.4/CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N",
"version": "3.0"
}
]
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-626"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10773",
"refsource": "CONFIRM",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10773"
},
{
"name": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b8e51a6a9db94bc1fb18ae831b3dab106b5a4b5f",
"refsource": "MISC",
"url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b8e51a6a9db94bc1fb18ae831b3dab106b5a4b5f"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
"assignerShortName": "redhat",
"cveId": "CVE-2020-10773",
"datePublished": "2020-09-10T16:07:48.000Z",
"dateReserved": "2020-03-20T00:00:00.000Z",
"dateUpdated": "2024-08-04T11:14:14.957Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
CVE-2019-17137 (GCVE-0-2019-17137)
Vulnerability from cvelistv5 – Published: 2020-02-10 19:15 – Updated: 2024-08-05 01:33
VLAI
EPSS
VEX
Summary
This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR AC1200 R6220 Firmware version 1.1.0.86 Smart WiFi Router. Authentication is not required to exploit this vulnerability. The specific flaw exists within the processing of path strings. By inserting a null byte into the path, the user can skip most authentication checks. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-8616.
Severity
9.4 (Critical)
CWE
- CWE-626 - Null Byte Interaction Error (Poison Null Byte)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zerodayinitiative.com/advisories/ZDI-… | x_refsource_MISC |
Impacted products
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-05T01:33:17.242Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://www.zerodayinitiative.com/advisories/ZDI-19-866/"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "AC1200",
"vendor": "NETGEAR",
"versions": [
{
"status": "affected",
"version": "R6220 Firmware version 1.1.0.86"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Michael Flanders of Trend Micro Zero Day Initiative"
}
],
"descriptions": [
{
"lang": "en",
"value": "This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR AC1200 R6220 Firmware version 1.1.0.86 Smart WiFi Router. Authentication is not required to exploit this vulnerability. The specific flaw exists within the processing of path strings. By inserting a null byte into the path, the user can skip most authentication checks. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-8616."
}
],
"metrics": [
{
"cvssV3_0": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.4,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H",
"version": "3.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-626",
"description": "CWE-626: Null Byte Interaction Error (Poison Null Byte)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2020-02-10T19:15:37.000Z",
"orgId": "99f1926a-a320-47d8-bbb5-42feb611262e",
"shortName": "zdi"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://www.zerodayinitiative.com/advisories/ZDI-19-866/"
}
],
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "zdi-disclosures@trendmicro.com",
"ID": "CVE-2019-17137",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "AC1200",
"version": {
"version_data": [
{
"version_value": "R6220 Firmware version 1.1.0.86"
}
]
}
}
]
},
"vendor_name": "NETGEAR"
}
]
}
},
"credit": "Michael Flanders of Trend Micro Zero Day Initiative",
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR AC1200 R6220 Firmware version 1.1.0.86 Smart WiFi Router. Authentication is not required to exploit this vulnerability. The specific flaw exists within the processing of path strings. By inserting a null byte into the path, the user can skip most authentication checks. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-8616."
}
]
},
"impact": {
"cvss": {
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H",
"version": "3.0"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-626: Null Byte Interaction Error (Poison Null Byte)"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://www.zerodayinitiative.com/advisories/ZDI-19-866/",
"refsource": "MISC",
"url": "https://www.zerodayinitiative.com/advisories/ZDI-19-866/"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "99f1926a-a320-47d8-bbb5-42feb611262e",
"assignerShortName": "zdi",
"cveId": "CVE-2019-17137",
"datePublished": "2020-02-10T19:15:38.000Z",
"dateReserved": "2019-10-04T00:00:00.000Z",
"dateUpdated": "2024-08-05T01:33:17.242Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
CVE-2019-11936 (GCVE-0-2019-11936)
Vulnerability from cvelistv5 – Published: 2019-12-04 16:25 – Updated: 2024-08-04 23:10
VLAI
EPSS
VEX
Summary
Various APC functions accept keys containing null bytes as input, leading to premature truncation of input. This issue affects HHVM versions prior to 3.30.12, all versions between 4.0.0 and 4.8.5, all versions between 4.9.0 and 4.23.1, as well as 4.24.0, 4.25.0, 4.26.0, 4.27.0, 4.28.0, and 4.28.1.
Severity
No CVSS data available.
CWE
- CWE-626 - Null Byte Interaction Error (Poison Null Byte)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://hhvm.com/blog/2019/10/28/security-update.html | x_refsource_CONFIRM |
| https://github.com/facebook/hhvm/commit/f57df6d8c… | x_refsource_CONFIRM |
| https://www.facebook.com/security/advisories/cve-… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| HHVM |
Affected:
4.28.2
Affected: 4.28.0 , < unspecified (custom) Affected: 4.27.1 Affected: 4.27.0 , < unspecified (custom) Affected: 4.26.1 Affected: 4.26.0 , < unspecified (custom) Affected: 4.25.1 Affected: 4.25.0 , < unspecified (custom) Affected: 4.24.1 Affected: 4.24.0 , < unspecified (custom) Affected: 4.23.2 Affected: 4.9.0 , < unspecified (custom) Affected: 4.8.6 Affected: 4.0.0 , < unspecified (custom) Affected: 3.30.12 Affected: unspecified , < 3.30.12 (custom) |
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T23:10:29.412Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://hhvm.com/blog/2019/10/28/security-update.html"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://github.com/facebook/hhvm/commit/f57df6d8cf33cb14c40f52287da29360e7003373"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://www.facebook.com/security/advisories/cve-2019-11936"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "HHVM",
"vendor": "Facebook",
"versions": [
{
"status": "affected",
"version": "4.28.2"
},
{
"lessThan": "unspecified",
"status": "affected",
"version": "4.28.0",
"versionType": "custom"
},
{
"status": "affected",
"version": "4.27.1"
},
{
"lessThan": "unspecified",
"status": "affected",
"version": "4.27.0",
"versionType": "custom"
},
{
"status": "affected",
"version": "4.26.1"
},
{
"lessThan": "unspecified",
"status": "affected",
"version": "4.26.0",
"versionType": "custom"
},
{
"status": "affected",
"version": "4.25.1"
},
{
"lessThan": "unspecified",
"status": "affected",
"version": "4.25.0",
"versionType": "custom"
},
{
"status": "affected",
"version": "4.24.1"
},
{
"lessThan": "unspecified",
"status": "affected",
"version": "4.24.0",
"versionType": "custom"
},
{
"status": "affected",
"version": "4.23.2"
},
{
"lessThan": "unspecified",
"status": "affected",
"version": "4.9.0",
"versionType": "custom"
},
{
"status": "affected",
"version": "4.8.6"
},
{
"lessThan": "unspecified",
"status": "affected",
"version": "4.0.0",
"versionType": "custom"
},
{
"status": "affected",
"version": "3.30.12"
},
{
"lessThan": "3.30.12",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
],
"dateAssigned": "2019-10-28T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "Various APC functions accept keys containing null bytes as input, leading to premature truncation of input. This issue affects HHVM versions prior to 3.30.12, all versions between 4.0.0 and 4.8.5, all versions between 4.9.0 and 4.23.1, as well as 4.24.0, 4.25.0, 4.26.0, 4.27.0, 4.28.0, and 4.28.1."
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-626",
"description": "CWE-626: Null Byte Interaction Error (Poison Null Byte)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2019-12-04T16:25:20.000Z",
"orgId": "4fc57720-52fe-4431-a0fb-3d2c8747b827",
"shortName": "facebook"
},
"references": [
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://hhvm.com/blog/2019/10/28/security-update.html"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/facebook/hhvm/commit/f57df6d8cf33cb14c40f52287da29360e7003373"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://www.facebook.com/security/advisories/cve-2019-11936"
}
],
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "cve-assign@fb.com",
"DATE_ASSIGNED": "2019-10-28",
"ID": "CVE-2019-11936",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "HHVM",
"version": {
"version_data": [
{
"version_affected": "!=\u003e",
"version_value": "4.28.2"
},
{
"version_affected": "\u003e=",
"version_value": "4.28.0"
},
{
"version_affected": "!=\u003e",
"version_value": "4.27.1"
},
{
"version_affected": "\u003e=",
"version_value": "4.27.0"
},
{
"version_affected": "!=\u003e",
"version_value": "4.26.1"
},
{
"version_affected": "\u003e=",
"version_value": "4.26.0"
},
{
"version_affected": "!=\u003e",
"version_value": "4.25.1"
},
{
"version_affected": "\u003e=",
"version_value": "4.25.0"
},
{
"version_affected": "!=\u003e",
"version_value": "4.24.1"
},
{
"version_affected": "\u003e=",
"version_value": "4.24.0"
},
{
"version_affected": "!=\u003e",
"version_value": "4.23.2"
},
{
"version_affected": "\u003e=",
"version_value": "4.9.0"
},
{
"version_affected": "!=\u003e",
"version_value": "4.8.6"
},
{
"version_affected": "\u003e=",
"version_value": "4.0.0"
},
{
"version_affected": "!=\u003e",
"version_value": "3.30.12"
},
{
"version_affected": "\u003c",
"version_value": "3.30.12"
}
]
}
}
]
},
"vendor_name": "Facebook"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "Various APC functions accept keys containing null bytes as input, leading to premature truncation of input. This issue affects HHVM versions prior to 3.30.12, all versions between 4.0.0 and 4.8.5, all versions between 4.9.0 and 4.23.1, as well as 4.24.0, 4.25.0, 4.26.0, 4.27.0, 4.28.0, and 4.28.1."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-626: Null Byte Interaction Error (Poison Null Byte)"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://hhvm.com/blog/2019/10/28/security-update.html",
"refsource": "CONFIRM",
"url": "https://hhvm.com/blog/2019/10/28/security-update.html"
},
{
"name": "https://github.com/facebook/hhvm/commit/f57df6d8cf33cb14c40f52287da29360e7003373",
"refsource": "CONFIRM",
"url": "https://github.com/facebook/hhvm/commit/f57df6d8cf33cb14c40f52287da29360e7003373"
},
{
"name": "https://www.facebook.com/security/advisories/cve-2019-11936",
"refsource": "CONFIRM",
"url": "https://www.facebook.com/security/advisories/cve-2019-11936"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "4fc57720-52fe-4431-a0fb-3d2c8747b827",
"assignerShortName": "facebook",
"cveId": "CVE-2019-11936",
"datePublished": "2019-12-04T16:25:20.000Z",
"dateReserved": "2019-05-13T00:00:00.000Z",
"dateUpdated": "2024-08-04T23:10:29.412Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
GHSA-CM33-6792-R9FM
Vulnerability from github – Published: 2026-05-07 00:12 – Updated: 2026-05-14 20:40
VLAI
Summary
Netty has a DNS Codec Input Validation Bypass (Encoder + Decoder)
Details
Security Vulnerability Report: DNS Codec Input Validation Bypass in Netty (Encoder + Decoder)
1. Vulnerability Summary
| Field | Value |
|---|---|
| Product | Netty |
| Version | 4.2.12.Final (and all prior versions with codec-dns) |
| Component | io.netty.handler.codec.dns.DnsCodecUtil |
| Vulnerability Type | CWE-20: Improper Input Validation / CWE-626: Null Byte Interaction Error / CWE-400: Uncontrolled Resource Consumption |
| Impact | DNS Cache Poisoning / Domain Validation Bypass / Denial of Service / Malformed DNS Packets |
2. Affected Components
Both the encoder and decoder in the same file are affected:
io.netty.handler.codec.dns.DnsCodecUtil—encodeDomainName()method (lines 31-51):- No null byte validation in domain name labels
- No per-label length validation (RFC 1035 max: 63 bytes)
- No total domain name length validation (RFC 1035 max: 255 bytes)
-
Empty labels silently truncate the domain name
-
io.netty.handler.codec.dns.DnsCodecUtil—decodeDomainName()method (lines 53-118): - No per-label length validation (max 63)
- No total domain name length validation (max 255)
- Unbounded StringBuilder growth from attacker-controlled DNS responses
3. Vulnerability Description
Netty's DNS codec does not enforce RFC 1035 domain name constraints during either encoding or decoding. This creates a bidirectional attack surface: malicious DNS responses can exploit the decoder, and user-influenced hostnames can exploit the encoder.
3.1 Encoder Side — Null Byte Injection (CWE-626)
A domain name containing a null byte (e.g., "evil\0.example.com") is encoded with the null byte embedded in the label data. This creates a domain name that different DNS implementations interpret differently:
- Java (full string): sees
"evil\0.example.com"as a single label containing a null - C/native DNS libraries: truncate at the null byte, seeing only
"evil" - DNS servers: may accept or reject based on implementation
This differential interpretation enables DNS cache poisoning and domain validation bypass.
3.2 Encoder Side — Overlength Label (RFC 1035 Violation)
Labels exceeding 63 bytes are accepted by the encoder. The length byte is written as a single unsigned byte, so a 200-byte label writes 0xC8 (200) as the length. Per RFC 1035, values 192-255 indicate compression pointers. This means:
- A 200-byte label length
0xC8would be interpreted as a compression pointer by standards-compliant DNS parsers - This creates parser confusion between label and pointer interpretation
3.3 Encoder Side — Silent Truncation via Empty Labels
encodeDomainName("a..b.com", buf);
// Encodes as: [01] 'a' [00]
// Only "a." is encoded, ".b.com" is silently dropped!
An attacker can craft input like "safe-domain..evil.com" which gets truncated to just "safe-domain.", potentially bypassing domain allowlists.
3.4 Decoder Side — Unbounded Memory Allocation
The decoder accepts labels of any length (0-255 bytes) without checking the RFC 1035 per-label limit of 63 bytes or the total domain name limit of 255 bytes. A malicious DNS server can return responses with oversized labels, causing excessive memory allocation.
Root Cause — Encoder
// DnsCodecUtil.java:31-51
static void encodeDomainName(String name, ByteBuf buf) {
if (ROOT.equals(name)) {
buf.writeByte(0);
return;
}
final String[] labels = name.split("\\.");
for (String label : labels) {
final int labelLen = label.length();
if (labelLen == 0) {
break; // NO ERROR - silently truncates!
}
// NO check: labelLen > 63
// NO check: label contains null bytes
// NO check: total name > 255 bytes
buf.writeByte(labelLen); // Can write values > 63!
ByteBufUtil.writeAscii(buf, label); // Null bytes pass through!
}
buf.writeByte(0);
}
Root Cause — Decoder
// DnsCodecUtil.java:94-99 (decodeDomainName)
} else if (len != 0) {
if (!in.isReadable(len)) { // Only checks if bytes EXIST, not if len <= 63
throw new CorruptedFrameException("truncated label in a name");
}
name.append(in.toString(in.readerIndex(), len, CharsetUtil.UTF_8)).append('.');
// ^^^^^^ StringBuilder grows WITHOUT any length limit
in.skipBytes(len);
}
Missing checks in decoder:
- No if (len > 63) check per RFC 1035 Section 2.3.4
- No if (name.length() > 255) check for total domain name length
4. Exploitability Prerequisites
Encoder Side (outbound)
- An application constructs DNS queries using Netty's DNS codec with user-influenced domain names
- The constructed DNS packets are sent to DNS servers or resolvers
Decoder Side (inbound)
- An application uses Netty's
codec-dnsorresolver-dnsmodule to process DNS responses - The application communicates with a malicious or compromised DNS server
Attack surface: Any Netty application using DNS resolution (DnsNameResolver) is potentially affected on the decoder side, as DNS responses from the network are attacker-controlled. The encoder side requires user-controlled hostnames.
5. Attack Scenarios
Scenario 1: DNS Cache Poisoning via Null Byte (Encoder)
String hostname = userInput; // "evil\0.trusted.com"
DnsQuery query = new DefaultDnsQuery(...)
.addRecord(DnsSection.QUESTION,
new DefaultDnsQuestion(hostname, DnsRecordType.A));
The DNS query for "evil\0.trusted.com" may be interpreted by some resolvers as a query for "evil" (truncated at null). If the attacker controls the DNS for "evil", they can return a response that gets cached for "evil\0.trusted.com" (or vice versa), poisoning the cache.
Scenario 2: Label/Pointer Confusion (Encoder)
A 200-byte label writes length byte 0xC8. Standards-compliant parsers interpret 0xC0-0xFF as compression pointer prefixes (RFC 1035 Section 4.1.4). The resulting DNS packet is structurally ambiguous:
Byte: [C8] [61 61 61 ... (200 bytes)]
↑
Label interpretation: 200-byte label starting with 'a'
Pointer interpretation: pointer to offset 0x0861 = 2145
Scenario 3: Memory Exhaustion via Large Labels (Decoder)
A malicious DNS server returns a response with a 255-byte label (RFC limit: 63). Netty decodes it without error, creating a 260+ character String. With compression pointers, a small DNS response can cause megabytes of StringBuilder allocation.
Scenario 4: Domain Truncation via Empty Label (Encoder)
encodeDomainName("safe-domain..evil.com", buf);
// Only "safe-domain." is encoded, "evil.com" silently dropped
This can bypass domain allowlists that check the input string.
Scenario 5: Downstream Processing Failures (Decoder)
Applications that pass decoded domain names to other DNS libraries, certificate validators, or URL parsers may crash or behave incorrectly when receiving names > 255 bytes, as these systems typically assume RFC 1035 compliance.
6. Proof of Concept
PoC 1: Encoder Null Byte and Overlength (DnsEncoderNullBytePoC.java)
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import java.lang.reflect.Method;
import java.nio.charset.StandardCharsets;
public class DnsEncoderNullBytePoC {
public static void main(String[] args) throws Exception {
System.out.println("=== Netty DNS Encoder Validation Bypass PoC ===\n");
Class<?> clazz = Class.forName("io.netty.handler.codec.dns.DnsCodecUtil");
Method encode = clazz.getDeclaredMethod("encodeDomainName",
String.class, ByteBuf.class);
encode.setAccessible(true);
// Test 1: Null byte in domain name
ByteBuf buf = Unpooled.buffer(256);
encode.invoke(null, "evil\0.example.com", buf);
byte[] bytes = new byte[buf.readableBytes()];
buf.readBytes(bytes);
buf.release();
System.out.print("[TEST 1] Null byte - Encoded: ");
for (byte b : bytes) System.out.printf("%02x ", b & 0xff);
System.out.println("\nVULNERABLE: Null byte 0x00 in label data!");
// Test 2: 200-byte label
ByteBuf buf2 = Unpooled.buffer(512);
encode.invoke(null, "a".repeat(200) + ".com", buf2);
System.out.println("\n[TEST 2] 200-byte label encoded: " + buf2.readableBytes() + " bytes");
System.out.println("VULNERABLE: Overlength label accepted!");
buf2.release();
// Test 3: Empty label truncation
ByteBuf buf3 = Unpooled.buffer(256);
encode.invoke(null, "a..b.com", buf3);
byte[] bytes3 = new byte[buf3.readableBytes()];
buf3.readBytes(bytes3);
buf3.release();
System.out.print("\n[TEST 3] Empty label - Encoded: ");
for (byte b : bytes3) System.out.printf("%02x ", b & 0xff);
System.out.println("\nVULNERABLE: Domain silently truncated!");
}
}
PoC 2: Decoder Length Bypass (DnsDecoderLengthPoC.java)
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import java.lang.reflect.Method;
import java.nio.charset.StandardCharsets;
public class DnsDecoderLengthPoC {
public static void main(String[] args) throws Exception {
System.out.println("=== Netty DNS Decoder Length Bypass PoC ===\n");
Class<?> clazz = Class.forName("io.netty.handler.codec.dns.DnsCodecUtil");
Method decode = clazz.getDeclaredMethod("decodeDomainName", ByteBuf.class);
decode.setAccessible(true);
// Test 1: 100-byte label (RFC limit: 63)
ByteBuf buf1 = Unpooled.buffer(256);
buf1.writeByte(100);
buf1.writeBytes("a".repeat(100).getBytes(StandardCharsets.US_ASCII));
buf1.writeByte(3);
buf1.writeBytes("com".getBytes(StandardCharsets.US_ASCII));
buf1.writeByte(0);
String r1 = (String) decode.invoke(null, buf1);
buf1.release();
System.out.println("[TEST 1] 100-byte label: length=" + r1.length() +
" VULNERABLE=" + (r1.length() > 64));
// Test 2: 5 x 60-byte labels = 305 bytes (RFC limit: 255)
ByteBuf buf2 = Unpooled.buffer(512);
for (int i = 0; i < 5; i++) {
buf2.writeByte(60);
buf2.writeBytes(String.valueOf((char)('a'+i)).repeat(60)
.getBytes(StandardCharsets.US_ASCII));
}
buf2.writeByte(0);
String r2 = (String) decode.invoke(null, buf2);
buf2.release();
System.out.println("[TEST 2] 305-byte domain: length=" + r2.length() +
" VULNERABLE=" + (r2.length() > 255));
}
}
How to Compile and Run
JARS=$(find ~/.m2/repository/io/netty -name "netty-*.jar" -path "*/4.2.12.Final/*" \
| grep -v sources | grep -v javadoc | tr '\n' ':')
# Encoder PoC
javac -cp "$JARS" DnsEncoderNullBytePoC.java
java --add-opens java.base/java.lang=ALL-UNNAMED -cp "$JARS:." DnsEncoderNullBytePoC
# Decoder PoC
javac -cp "$JARS" DnsDecoderLengthPoC.java
java --add-opens java.base/java.lang=ALL-UNNAMED -cp "$JARS:." DnsDecoderLengthPoC
PoC Execution Output (Verified on Netty 4.2.12.Final)
Encoder PoC:
=== Netty DNS Encoder Validation Bypass PoC ===
[TEST 1] Null byte in domain name
Input: "evil\0.example.com"
Encoded bytes: 05 65 76 69 6c 00 07 65 78 61 6d 70 6c 65 03 63 6f 6d 00
Null byte in label data: true
VULNERABLE: YES - Null byte accepted!
[TEST 2] Label > 63 bytes in encoder
Input: "aaaaaa..." (200-char label)
Encoded bytes: 206
VULNERABLE: YES - Overlength label accepted in encoder!
[TEST 3] Empty labels (consecutive dots)
Input: "a..b.com"
Encoded bytes: 01 61 00
Note: Empty label truncates the name (may lose data)
Decoder PoC:
=== Netty DNS Decoder Length Bypass PoC ===
[TEST 1] Label > 63 bytes (RFC 1035 violation)
Label length: 100 bytes (RFC limit: 63)
Decoded name length: 105
VULNERABLE: YES - Label > 63 bytes accepted!
[TEST 2] Domain > 255 bytes via multiple labels
5 labels x 60 bytes = 300+ bytes total
RFC 1035 limit: 255 bytes
Decoded name length: 305
VULNERABLE: YES - Domain > 255 bytes accepted!
7. Impact Analysis
| Impact Category | Description |
|---|---|
| Integrity | HIGH — Null byte injection causes differential interpretation across DNS implementations |
| Availability | HIGH — Malicious DNS responses can cause unbounded memory allocation via decoder |
| DNS Cache Poisoning | Different parsers see different domain names from the same encoded packet |
| Domain Validation Bypass | Null bytes can bypass allowlist/blocklist checks in DNS proxies |
| Label/Pointer Confusion | Length bytes > 63 conflict with RFC 1035 compression pointer encoding |
| Silent Truncation | Empty labels silently drop the remainder of the domain name |
| Downstream Failures | Oversized domain names may crash certificate validators, URL parsers, or other DNS-aware libraries |
8. Remediation Recommendations
Fix for Encoder (encodeDomainName)
static void encodeDomainName(String name, ByteBuf buf) {
if (ROOT.equals(name)) {
buf.writeByte(0);
return;
}
int totalLength = 0;
final String[] labels = name.split("\\.");
for (String label : labels) {
final int labelLen = label.length();
if (labelLen == 0) {
throw new IllegalArgumentException("DNS name contains empty label: " + name);
}
if (labelLen > 63) {
throw new IllegalArgumentException(
"DNS label length " + labelLen + " exceeds maximum of 63: " + name);
}
for (int i = 0; i < label.length(); i++) {
if (label.charAt(i) == '\0') {
throw new IllegalArgumentException(
"DNS label contains null byte at index " + i);
}
}
totalLength += 1 + labelLen;
if (totalLength > 254) {
throw new IllegalArgumentException(
"DNS name exceeds maximum length of 255: " + name);
}
buf.writeByte(labelLen);
ByteBufUtil.writeAscii(buf, label);
}
buf.writeByte(0);
}
Fix for Decoder (decodeDomainName)
// Add after "} else if (len != 0) {":
if (len > 63) {
throw new CorruptedFrameException("DNS label length " + len + " exceeds maximum of 63");
}
// Add after "name.append(...)":
if (name.length() > 255) {
throw new CorruptedFrameException("DNS domain name length exceeds maximum of 255");
}
9. Resources
Severity
7.5 (High)
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 4.2.12.Final"
},
"package": {
"ecosystem": "Maven",
"name": "io.netty:netty-codec-dns"
},
"ranges": [
{
"events": [
{
"introduced": "4.2.0.Alpha1"
},
{
"fixed": "4.2.13.Final"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 4.1.132.Final"
},
"package": {
"ecosystem": "Maven",
"name": "io.netty:netty-codec-dns"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.1.133.Final"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-42579"
],
"database_specific": {
"cwe_ids": [
"CWE-20",
"CWE-400",
"CWE-626"
],
"github_reviewed": true,
"github_reviewed_at": "2026-05-07T00:12:47Z",
"nvd_published_at": "2026-05-13T19:17:23Z",
"severity": "HIGH"
},
"details": "# Security Vulnerability Report: DNS Codec Input Validation Bypass in Netty (Encoder + Decoder)\n\n## 1. Vulnerability Summary\n\n| Field | Value |\n|-------|-------|\n| **Product** | Netty |\n| **Version** | 4.2.12.Final (and all prior versions with codec-dns) |\n| **Component** | `io.netty.handler.codec.dns.DnsCodecUtil` |\n| **Vulnerability Type** | CWE-20: Improper Input Validation / CWE-626: Null Byte Interaction Error / CWE-400: Uncontrolled Resource Consumption |\n| **Impact** | DNS Cache Poisoning / Domain Validation Bypass / Denial of Service / Malformed DNS Packets |\n\n## 2. Affected Components\n\nBoth the encoder and decoder in the same file are affected:\n\n- `io.netty.handler.codec.dns.DnsCodecUtil` \u2014 `encodeDomainName()` method (lines 31-51):\n - No null byte validation in domain name labels\n - No per-label length validation (RFC 1035 max: 63 bytes)\n - No total domain name length validation (RFC 1035 max: 255 bytes)\n - Empty labels silently truncate the domain name\n\n- `io.netty.handler.codec.dns.DnsCodecUtil` \u2014 `decodeDomainName()` method (lines 53-118):\n - No per-label length validation (max 63)\n - No total domain name length validation (max 255)\n - Unbounded StringBuilder growth from attacker-controlled DNS responses\n\n## 3. Vulnerability Description\n\nNetty\u0027s DNS codec does **not enforce RFC 1035 domain name constraints** during either encoding or decoding. This creates a bidirectional attack surface: malicious DNS responses can exploit the decoder, and user-influenced hostnames can exploit the encoder.\n\n### 3.1 Encoder Side \u2014 Null Byte Injection (CWE-626)\n\nA domain name containing a null byte (e.g., `\"evil\\0.example.com\"`) is encoded with the null byte embedded in the label data. This creates a domain name that different DNS implementations interpret differently:\n\n- **Java (full string)**: sees `\"evil\\0.example.com\"` as a single label containing a null\n- **C/native DNS libraries**: truncate at the null byte, seeing only `\"evil\"`\n- **DNS servers**: may accept or reject based on implementation\n\nThis differential interpretation enables **DNS cache poisoning** and **domain validation bypass**.\n\n### 3.2 Encoder Side \u2014 Overlength Label (RFC 1035 Violation)\n\nLabels exceeding 63 bytes are accepted by the encoder. The length byte is written as a single unsigned byte, so a 200-byte label writes `0xC8` (200) as the length. Per RFC 1035, values 192-255 indicate **compression pointers**. This means:\n\n- A 200-byte label length `0xC8` would be interpreted as a **compression pointer** by standards-compliant DNS parsers\n- This creates **parser confusion** between label and pointer interpretation\n\n### 3.3 Encoder Side \u2014 Silent Truncation via Empty Labels\n\n```java\nencodeDomainName(\"a..b.com\", buf);\n// Encodes as: [01] \u0027a\u0027 [00]\n// Only \"a.\" is encoded, \".b.com\" is silently dropped!\n```\n\nAn attacker can craft input like `\"safe-domain..evil.com\"` which gets truncated to just `\"safe-domain.\"`, potentially bypassing domain allowlists.\n\n### 3.4 Decoder Side \u2014 Unbounded Memory Allocation\n\nThe decoder accepts labels of any length (0-255 bytes) without checking the RFC 1035 per-label limit of 63 bytes or the total domain name limit of 255 bytes. A malicious DNS server can return responses with oversized labels, causing excessive memory allocation.\n\n### Root Cause \u2014 Encoder\n\n```java\n// DnsCodecUtil.java:31-51\nstatic void encodeDomainName(String name, ByteBuf buf) {\n if (ROOT.equals(name)) {\n buf.writeByte(0);\n return;\n }\n final String[] labels = name.split(\"\\\\.\");\n for (String label : labels) {\n final int labelLen = label.length();\n if (labelLen == 0) {\n break; // NO ERROR - silently truncates!\n }\n // NO check: labelLen \u003e 63\n // NO check: label contains null bytes\n // NO check: total name \u003e 255 bytes\n buf.writeByte(labelLen); // Can write values \u003e 63!\n ByteBufUtil.writeAscii(buf, label); // Null bytes pass through!\n }\n buf.writeByte(0);\n}\n```\n\n### Root Cause \u2014 Decoder\n\n```java\n// DnsCodecUtil.java:94-99 (decodeDomainName)\n} else if (len != 0) {\n if (!in.isReadable(len)) { // Only checks if bytes EXIST, not if len \u003c= 63\n throw new CorruptedFrameException(\"truncated label in a name\");\n }\n name.append(in.toString(in.readerIndex(), len, CharsetUtil.UTF_8)).append(\u0027.\u0027);\n // ^^^^^^ StringBuilder grows WITHOUT any length limit\n in.skipBytes(len);\n}\n```\n\n**Missing checks in decoder**:\n- No `if (len \u003e 63)` check per RFC 1035 Section 2.3.4\n- No `if (name.length() \u003e 255)` check for total domain name length\n\n## 4. Exploitability Prerequisites\n\n### Encoder Side (outbound)\n1. An application constructs DNS queries using Netty\u0027s DNS codec with user-influenced domain names\n2. The constructed DNS packets are sent to DNS servers or resolvers\n\n### Decoder Side (inbound)\n1. An application uses Netty\u0027s `codec-dns` or `resolver-dns` module to process DNS responses\n2. The application communicates with a malicious or compromised DNS server\n\n**Attack surface**: Any Netty application using DNS resolution (`DnsNameResolver`) is potentially affected on the decoder side, as DNS responses from the network are attacker-controlled. The encoder side requires user-controlled hostnames.\n\n## 5. Attack Scenarios\n\n### Scenario 1: DNS Cache Poisoning via Null Byte (Encoder)\n\n```java\nString hostname = userInput; // \"evil\\0.trusted.com\"\nDnsQuery query = new DefaultDnsQuery(...)\n .addRecord(DnsSection.QUESTION,\n new DefaultDnsQuestion(hostname, DnsRecordType.A));\n```\n\nThe DNS query for `\"evil\\0.trusted.com\"` may be interpreted by some resolvers as a query for `\"evil\"` (truncated at null). If the attacker controls the DNS for `\"evil\"`, they can return a response that gets cached for `\"evil\\0.trusted.com\"` (or vice versa), poisoning the cache.\n\n### Scenario 2: Label/Pointer Confusion (Encoder)\n\nA 200-byte label writes length byte `0xC8`. Standards-compliant parsers interpret `0xC0-0xFF` as **compression pointer** prefixes (RFC 1035 Section 4.1.4). The resulting DNS packet is structurally ambiguous:\n\n```\nByte: [C8] [61 61 61 ... (200 bytes)]\n \u2191\n Label interpretation: 200-byte label starting with \u0027a\u0027\n Pointer interpretation: pointer to offset 0x0861 = 2145\n```\n\n### Scenario 3: Memory Exhaustion via Large Labels (Decoder)\n\nA malicious DNS server returns a response with a 255-byte label (RFC limit: 63). Netty decodes it without error, creating a 260+ character String. With compression pointers, a small DNS response can cause megabytes of StringBuilder allocation.\n\n### Scenario 4: Domain Truncation via Empty Label (Encoder)\n\n```java\nencodeDomainName(\"safe-domain..evil.com\", buf);\n// Only \"safe-domain.\" is encoded, \"evil.com\" silently dropped\n```\n\nThis can bypass domain allowlists that check the input string.\n\n### Scenario 5: Downstream Processing Failures (Decoder)\n\nApplications that pass decoded domain names to other DNS libraries, certificate validators, or URL parsers may crash or behave incorrectly when receiving names \u003e 255 bytes, as these systems typically assume RFC 1035 compliance.\n\n## 6. Proof of Concept\n\n### PoC 1: Encoder Null Byte and Overlength (DnsEncoderNullBytePoC.java)\n\n```java\nimport io.netty.buffer.ByteBuf;\nimport io.netty.buffer.Unpooled;\nimport java.lang.reflect.Method;\nimport java.nio.charset.StandardCharsets;\n\npublic class DnsEncoderNullBytePoC {\n public static void main(String[] args) throws Exception {\n System.out.println(\"=== Netty DNS Encoder Validation Bypass PoC ===\\n\");\n\n Class\u003c?\u003e clazz = Class.forName(\"io.netty.handler.codec.dns.DnsCodecUtil\");\n Method encode = clazz.getDeclaredMethod(\"encodeDomainName\",\n String.class, ByteBuf.class);\n encode.setAccessible(true);\n\n // Test 1: Null byte in domain name\n ByteBuf buf = Unpooled.buffer(256);\n encode.invoke(null, \"evil\\0.example.com\", buf);\n byte[] bytes = new byte[buf.readableBytes()];\n buf.readBytes(bytes);\n buf.release();\n System.out.print(\"[TEST 1] Null byte - Encoded: \");\n for (byte b : bytes) System.out.printf(\"%02x \", b \u0026 0xff);\n System.out.println(\"\\nVULNERABLE: Null byte 0x00 in label data!\");\n\n // Test 2: 200-byte label\n ByteBuf buf2 = Unpooled.buffer(512);\n encode.invoke(null, \"a\".repeat(200) + \".com\", buf2);\n System.out.println(\"\\n[TEST 2] 200-byte label encoded: \" + buf2.readableBytes() + \" bytes\");\n System.out.println(\"VULNERABLE: Overlength label accepted!\");\n buf2.release();\n\n // Test 3: Empty label truncation\n ByteBuf buf3 = Unpooled.buffer(256);\n encode.invoke(null, \"a..b.com\", buf3);\n byte[] bytes3 = new byte[buf3.readableBytes()];\n buf3.readBytes(bytes3);\n buf3.release();\n System.out.print(\"\\n[TEST 3] Empty label - Encoded: \");\n for (byte b : bytes3) System.out.printf(\"%02x \", b \u0026 0xff);\n System.out.println(\"\\nVULNERABLE: Domain silently truncated!\");\n }\n}\n```\n\n### PoC 2: Decoder Length Bypass (DnsDecoderLengthPoC.java)\n\n```java\nimport io.netty.buffer.ByteBuf;\nimport io.netty.buffer.Unpooled;\nimport java.lang.reflect.Method;\nimport java.nio.charset.StandardCharsets;\n\npublic class DnsDecoderLengthPoC {\n public static void main(String[] args) throws Exception {\n System.out.println(\"=== Netty DNS Decoder Length Bypass PoC ===\\n\");\n\n Class\u003c?\u003e clazz = Class.forName(\"io.netty.handler.codec.dns.DnsCodecUtil\");\n Method decode = clazz.getDeclaredMethod(\"decodeDomainName\", ByteBuf.class);\n decode.setAccessible(true);\n\n // Test 1: 100-byte label (RFC limit: 63)\n ByteBuf buf1 = Unpooled.buffer(256);\n buf1.writeByte(100);\n buf1.writeBytes(\"a\".repeat(100).getBytes(StandardCharsets.US_ASCII));\n buf1.writeByte(3);\n buf1.writeBytes(\"com\".getBytes(StandardCharsets.US_ASCII));\n buf1.writeByte(0);\n String r1 = (String) decode.invoke(null, buf1);\n buf1.release();\n System.out.println(\"[TEST 1] 100-byte label: length=\" + r1.length() +\n \" VULNERABLE=\" + (r1.length() \u003e 64));\n\n // Test 2: 5 x 60-byte labels = 305 bytes (RFC limit: 255)\n ByteBuf buf2 = Unpooled.buffer(512);\n for (int i = 0; i \u003c 5; i++) {\n buf2.writeByte(60);\n buf2.writeBytes(String.valueOf((char)(\u0027a\u0027+i)).repeat(60)\n .getBytes(StandardCharsets.US_ASCII));\n }\n buf2.writeByte(0);\n String r2 = (String) decode.invoke(null, buf2);\n buf2.release();\n System.out.println(\"[TEST 2] 305-byte domain: length=\" + r2.length() +\n \" VULNERABLE=\" + (r2.length() \u003e 255));\n }\n}\n```\n\n### How to Compile and Run\n\n```bash\nJARS=$(find ~/.m2/repository/io/netty -name \"netty-*.jar\" -path \"*/4.2.12.Final/*\" \\\n | grep -v sources | grep -v javadoc | tr \u0027\\n\u0027 \u0027:\u0027)\n\n# Encoder PoC\njavac -cp \"$JARS\" DnsEncoderNullBytePoC.java\njava --add-opens java.base/java.lang=ALL-UNNAMED -cp \"$JARS:.\" DnsEncoderNullBytePoC\n\n# Decoder PoC\njavac -cp \"$JARS\" DnsDecoderLengthPoC.java\njava --add-opens java.base/java.lang=ALL-UNNAMED -cp \"$JARS:.\" DnsDecoderLengthPoC\n```\n\n### PoC Execution Output (Verified on Netty 4.2.12.Final)\n\n**Encoder PoC:**\n```\n=== Netty DNS Encoder Validation Bypass PoC ===\n\n[TEST 1] Null byte in domain name\n Input: \"evil\\0.example.com\"\n Encoded bytes: 05 65 76 69 6c 00 07 65 78 61 6d 70 6c 65 03 63 6f 6d 00\n Null byte in label data: true\n VULNERABLE: YES - Null byte accepted!\n\n[TEST 2] Label \u003e 63 bytes in encoder\n Input: \"aaaaaa...\" (200-char label)\n Encoded bytes: 206\n VULNERABLE: YES - Overlength label accepted in encoder!\n\n[TEST 3] Empty labels (consecutive dots)\n Input: \"a..b.com\"\n Encoded bytes: 01 61 00\n Note: Empty label truncates the name (may lose data)\n```\n\n**Decoder PoC:**\n```\n=== Netty DNS Decoder Length Bypass PoC ===\n\n[TEST 1] Label \u003e 63 bytes (RFC 1035 violation)\n Label length: 100 bytes (RFC limit: 63)\n Decoded name length: 105\n VULNERABLE: YES - Label \u003e 63 bytes accepted!\n\n[TEST 2] Domain \u003e 255 bytes via multiple labels\n 5 labels x 60 bytes = 300+ bytes total\n RFC 1035 limit: 255 bytes\n Decoded name length: 305\n VULNERABLE: YES - Domain \u003e 255 bytes accepted!\n```\n\n## 7. Impact Analysis\n\n| Impact Category | Description |\n|----------------|-------------|\n| **Integrity** | HIGH \u2014 Null byte injection causes differential interpretation across DNS implementations |\n| **Availability** | HIGH \u2014 Malicious DNS responses can cause unbounded memory allocation via decoder |\n| **DNS Cache Poisoning** | Different parsers see different domain names from the same encoded packet |\n| **Domain Validation Bypass** | Null bytes can bypass allowlist/blocklist checks in DNS proxies |\n| **Label/Pointer Confusion** | Length bytes \u003e 63 conflict with RFC 1035 compression pointer encoding |\n| **Silent Truncation** | Empty labels silently drop the remainder of the domain name |\n| **Downstream Failures** | Oversized domain names may crash certificate validators, URL parsers, or other DNS-aware libraries |\n\n## 8. Remediation Recommendations\n\n### Fix for Encoder (encodeDomainName)\n\n```java\nstatic void encodeDomainName(String name, ByteBuf buf) {\n if (ROOT.equals(name)) {\n buf.writeByte(0);\n return;\n }\n int totalLength = 0;\n final String[] labels = name.split(\"\\\\.\");\n for (String label : labels) {\n final int labelLen = label.length();\n if (labelLen == 0) {\n throw new IllegalArgumentException(\"DNS name contains empty label: \" + name);\n }\n if (labelLen \u003e 63) {\n throw new IllegalArgumentException(\n \"DNS label length \" + labelLen + \" exceeds maximum of 63: \" + name);\n }\n for (int i = 0; i \u003c label.length(); i++) {\n if (label.charAt(i) == \u0027\\0\u0027) {\n throw new IllegalArgumentException(\n \"DNS label contains null byte at index \" + i);\n }\n }\n totalLength += 1 + labelLen;\n if (totalLength \u003e 254) {\n throw new IllegalArgumentException(\n \"DNS name exceeds maximum length of 255: \" + name);\n }\n buf.writeByte(labelLen);\n ByteBufUtil.writeAscii(buf, label);\n }\n buf.writeByte(0);\n}\n```\n\n### Fix for Decoder (decodeDomainName)\n\n```java\n// Add after \"} else if (len != 0) {\":\nif (len \u003e 63) {\n throw new CorruptedFrameException(\"DNS label length \" + len + \" exceeds maximum of 63\");\n}\n// Add after \"name.append(...)\":\nif (name.length() \u003e 255) {\n throw new CorruptedFrameException(\"DNS domain name length exceeds maximum of 255\");\n}\n```\n\n## 9. Resources\n\n- [RFC 1035 Section 2.3.4: Size Limits](https://tools.ietf.org/html/rfc1035#section-2.3.4)\n- [RFC 1035 Section 4.1.4: Message Compression](https://tools.ietf.org/html/rfc1035#section-4.1.4)\n- [CWE-20: Improper Input Validation](https://cwe.mitre.org/data/definitions/20.html)\n- [CWE-400: Uncontrolled Resource Consumption](https://cwe.mitre.org/data/definitions/400.html)\n- [CWE-626: Null Byte Interaction Error](https://cwe.mitre.org/data/definitions/626.html)",
"id": "GHSA-cm33-6792-r9fm",
"modified": "2026-05-14T20:40:58Z",
"published": "2026-05-07T00:12:47Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/netty/netty/security/advisories/GHSA-cm33-6792-r9fm"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42579"
},
{
"type": "PACKAGE",
"url": "https://github.com/netty/netty"
},
{
"type": "WEB",
"url": "https://tools.ietf.org/html/rfc1035#section-2.3.4"
},
{
"type": "WEB",
"url": "https://tools.ietf.org/html/rfc1035#section-4.1.4"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "Netty has a DNS Codec Input Validation Bypass (Encoder + Decoder)"
}
GHSA-JMPC-XV4R-M7FW
Vulnerability from github – Published: 2026-08-22 15:31 – Updated: 2026-08-22 15:31
VLAI
Details
Netty (io.netty:netty-codec-socks) versions 4.2.0.Final through 4.2.16.Final and 4.1.x through 4.1.136.Final contain null byte, CRLF, and credential injection vulnerabilities in the SOCKS4 (Socks4ClientEncoder) and SOCKS5 (Socks5ClientEncoder) client encoders, which fail to validate domain address and authentication (username/password) fields. An attacker able to control these fields can inject null bytes or CRLF characters to truncate or alter values, potentially enabling domain spoofing, SOCKS4 userid truncation, authentication data injection, and protocol confusion. Fixed in 4.2.17.Final and 4.1.137.Final.
Severity
{
"affected": [],
"aliases": [
"CVE-2026-62380"
],
"database_specific": {
"cwe_ids": [
"CWE-626"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-22T13:16:39Z",
"severity": "MODERATE"
},
"details": "Netty (io.netty:netty-codec-socks) versions 4.2.0.Final through 4.2.16.Final and 4.1.x through 4.1.136.Final contain null byte, CRLF, and credential injection vulnerabilities in the SOCKS4 (Socks4ClientEncoder) and SOCKS5 (Socks5ClientEncoder) client encoders, which fail to validate domain address and authentication (username/password) fields. An attacker able to control these fields can inject null bytes or CRLF characters to truncate or alter values, potentially enabling domain spoofing, SOCKS4 userid truncation, authentication data injection, and protocol confusion. Fixed in 4.2.17.Final and 4.1.137.Final.",
"id": "GHSA-jmpc-xv4r-m7fw",
"modified": "2026-08-22T15:31:02Z",
"published": "2026-08-22T15:31:02Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/netty/netty/security/advisories/GHSA-cc6x-ffm5-83wf"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-62380"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/netty-before-final-socks-proxy-null-byte-injection"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-M3R7-XJQ8-GC4R
Vulnerability from github – Published: 2026-05-07 12:31 – Updated: 2026-07-22 15:31
VLAI
Details
A flaw was found in gnutls. Servers configured with RSA-PSK (Rivest–Shamir–Adleman – Pre-Shared Key) wrongfully matched usernames containing a NUL character with truncated usernames. A remote attacker could exploit this by sending a specially crafted username, leading to an authentication bypass. This vulnerability allows an attacker to gain unauthorized access by circumventing the authentication process.
Severity
7.1 (High)
{
"affected": [],
"aliases": [
"CVE-2026-42010"
],
"database_specific": {
"cwe_ids": [
"CWE-170",
"CWE-626"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-07T12:16:17Z",
"severity": "HIGH"
},
"details": "A flaw was found in gnutls. Servers configured with RSA-PSK (Rivest\u2013Shamir\u2013Adleman \u2013 Pre-Shared Key) wrongfully matched usernames containing a NUL character with truncated usernames. A remote attacker could exploit this by sending a specially crafted username, leading to an authentication bypass. This vulnerability allows an attacker to gain unauthorized access by circumventing the authentication process.",
"id": "GHSA-m3r7-xjq8-gc4r",
"modified": "2026-07-22T15:31:13Z",
"published": "2026-05-07T12:31:23Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42010"
},
{
"type": "WEB",
"url": "https://www.gnutls.org/security-new.html#GNUTLS-SA-2026-04-29-4"
},
{
"type": "WEB",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42010.json"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467289"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2026-42010"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:41921"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:40762"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:36006"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:36005"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:36004"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:34790"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:34788"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:34764"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:33125"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:32962"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:30850"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:30849"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:30004"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:29197"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:26409"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:26319"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:20613"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:20612"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:20611"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:13274"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N",
"type": "CVSS_V3"
}
]
}
Mitigation
Implementation
Remove null bytes from all incoming strings.
No CAPEC attack patterns related to this CWE.