rhsa-2025_0039
Vulnerability from csaf_redhat
Published
2025-01-06 13:36
Modified
2025-01-06 22:00
Summary
Red Hat Security Advisory: bind and bind-dyndb-ldap security update
Notes
Topic
An update for bind and bind-dyndb-ldap is now available for Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
The Berkeley Internet Name Domain (BIND) is an implementation of the Domain Name System (DNS) protocols. BIND includes a DNS server (named); a resolver library (routines for applications to use when interfacing with DNS); and tools for verifying that the DNS server is operating correctly.
Security Fix(es):
* bind: stack exhaustion in control channel code may lead to DoS (CVE-2023-3341)
* bind9: Parsing large DNS messages may cause excessive CPU load (CVE-2023-4408)
* bind9: KeyTrap - Extreme CPU consumption in DNSSEC validator (CVE-2023-50387)
* bind9: Preparing an NSEC3 closest encloser proof can exhaust CPU resources (CVE-2023-50868)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
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"title": "bind: stack exhaustion in control channel code may lead to DoS"
},
{
"cve": "CVE-2023-4408",
"cwe": {
"id": "CWE-400",
"name": "Uncontrolled Resource Consumption"
},
"discovery_date": "2024-02-12T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2263896"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the bind package. This issue may allow a remote attacker with no specific privileges to craft a specially long DNS message leading to an excessive and uncontrolled CPU usage, the server being unavailable, and a Denial of Service.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "bind9: Parsing large DNS messages may cause excessive CPU load",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This vulnerability in the DNS message parsing code of BIND is of important severity due to its potential to cause excessive and uncontrolled CPU usage through specially crafted DNS queries or responses. The flaw exposes both authoritative DNS servers and recursive resolvers to Denial of Service (DoS) attacks, where an attacker can exploit the high computational complexity of the parsing routine to overwhelm the server. This can lead to significant degradation of service, rendering the DNS server unresponsive and disrupting network operations.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2023-4408"
},
{
"category": "external",
"summary": "RHBZ#2263896",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2263896"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2023-4408",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-4408"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-4408",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-4408"
},
{
"category": "external",
"summary": "https://kb.isc.org/docs/cve-2023-4408",
"url": "https://kb.isc.org/docs/cve-2023-4408"
}
],
"release_date": "2024-02-13T00:00:00+00:00",
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{
"category": "vendor_fix",
"date": "2025-01-06T13:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
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"title": "bind9: Parsing large DNS messages may cause excessive CPU load"
},
{
"cve": "CVE-2023-50387",
"cwe": {
"id": "CWE-400",
"name": "Uncontrolled Resource Consumption"
},
"discovery_date": "2024-02-12T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2263914"
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],
"notes": [
{
"category": "description",
"text": "Processing specially crafted responses coming from DNSSEC-signed zones can lead to uncontrolled CPU usage, leading to a Denial of Service in the DNSSEC-validating resolver side.\r\n\r\nThis vulnerability applies only for systems where DNSSEC validation is enabled.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "bind9: KeyTrap - Extreme CPU consumption in DNSSEC validator",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This vulnerability in DNSSEC-validating resolvers is of important severity because it can lead to uncontrolled CPU consumption, resulting in a Denial of Service (DoS). By exploiting this flaw, attackers can send specially crafted DNS responses that cause the resolver to enter a state of excessive resource utilization. This can severely impact the availability and performance of DNS services, affecting not only the targeted resolver but potentially cascading to other dependent systems and services.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2023-50387"
},
{
"category": "external",
"summary": "RHBZ#2263914",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2263914"
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{
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"url": "https://www.cve.org/CVERecord?id=CVE-2023-50387"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-50387",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-50387"
},
{
"category": "external",
"summary": "https://blog.powerdns.com/2024/02/13/powerdns-recursor-4-8-6-4-9-3-5-0-2-released",
"url": "https://blog.powerdns.com/2024/02/13/powerdns-recursor-4-8-6-4-9-3-5-0-2-released"
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{
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"summary": "https://kb.isc.org/docs/cve-2023-50387",
"url": "https://kb.isc.org/docs/cve-2023-50387"
},
{
"category": "external",
"summary": "https://www.knot-resolver.cz/2024-02-13-knot-resolver-5.7.1.html",
"url": "https://www.knot-resolver.cz/2024-02-13-knot-resolver-5.7.1.html"
}
],
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{
"category": "vendor_fix",
"date": "2025-01-06T13:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"scope": "UNCHANGED",
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"title": "bind9: KeyTrap - Extreme CPU consumption in DNSSEC validator"
},
{
"cve": "CVE-2023-50868",
"cwe": {
"id": "CWE-400",
"name": "Uncontrolled Resource Consumption"
},
"discovery_date": "2024-02-12T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2263917"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in bind9. By flooding a DNSSEC resolver with responses coming from a DNSEC-signed zone using NSEC3, an attacker can lead the targeted resolver to a CPU exhaustion, further leading to a Denial of Service on the targeted host.\r\n\r\nThis vulnerability applies only for systems where DNSSEC validation is enabled.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "bind9: Preparing an NSEC3 closest encloser proof can exhaust CPU resources",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "The vulnerability in BIND9 that leads to CPU exhaustion through a flood of DNSSEC responses with NSEC3 signatures is a important severity issue due to its potential to induce a Denial of Service (DoS) condition on affected resolvers. By exploiting this flaw, an attacker can overwhelm a DNSSEC-enabled resolver with computationally intensive tasks, depleting CPU resources and disrupting normal DNS operations. This can result in significant service outages, affecting the resolver\u0027s ability to process legitimate DNS queries and thereby compromising network availability and reliability. The impact is exacerbated in high-traffic environments or where DNSSEC validation is extensively employed, making prompt remediation essential to prevent operational disruptions and maintain DNS infrastructure integrity.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2023-50868"
},
{
"category": "external",
"summary": "RHBZ#2263917",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2263917"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2023-50868",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-50868"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-50868",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-50868"
},
{
"category": "external",
"summary": "https://blog.powerdns.com/2024/02/13/powerdns-recursor-4-8-6-4-9-3-5-0-2-released",
"url": "https://blog.powerdns.com/2024/02/13/powerdns-recursor-4-8-6-4-9-3-5-0-2-released"
},
{
"category": "external",
"summary": "https://kb.isc.org/docs/cve-2023-50868",
"url": "https://kb.isc.org/docs/cve-2023-50868"
},
{
"category": "external",
"summary": "https://www.knot-resolver.cz/2024-02-13-knot-resolver-5.7.1.html",
"url": "https://www.knot-resolver.cz/2024-02-13-knot-resolver-5.7.1.html"
}
],
"release_date": "2024-02-13T00:00:00+00:00",
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{
"category": "vendor_fix",
"date": "2025-01-06T13:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
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]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "bind9: Preparing an NSEC3 closest encloser proof can exhaust CPU resources"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.