CWE-295
AllowedImproper Certificate Validation
Abstraction: Base · Status: Draft
The product does not validate, or incorrectly validates, a certificate.
2259 vulnerabilities reference this CWE, most recent first.
GHSA-536G-66VG-C27F
Vulnerability from github – Published: 2026-07-28 21:31 – Updated: 2026-07-28 21:31IBM TS4500 CLI tool Versions: 0.1.31 through 1.12.0.0 does not validate or improperly validates TLS certificate validation, which could allow an attacker to obtain sensitive information using man in the middle techniques.
{
"affected": [],
"aliases": [
"CVE-2026-16107"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-28T20:17:23Z",
"severity": "MODERATE"
},
"details": "IBM TS4500 CLI tool Versions:\u00a0 0.1.31 through 1.12.0.0 does not validate or improperly validates TLS certificate validation, which could allow\u00a0an attacker to obtain sensitive information using man in the middle techniques.",
"id": "GHSA-536g-66vg-c27f",
"modified": "2026-07-28T21:31:33Z",
"published": "2026-07-28T21:31:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-16107"
},
{
"type": "WEB",
"url": "https://www.ibm.com/support/pages/node/7280583"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-53RM-7GR9-9HFX
Vulnerability from github – Published: 2022-05-13 01:23 – Updated: 2025-04-20 03:49The apt package in Debian jessie before 1.0.9.8.4, in Debian unstable before 1.4~beta2, in Ubuntu 14.04 LTS before 1.0.1ubuntu2.17, in Ubuntu 16.04 LTS before 1.2.15ubuntu0.2, and in Ubuntu 16.10 before 1.3.2ubuntu0.1 allows man-in-the-middle attackers to bypass a repository-signing protection mechanism by leveraging improper error handling when validating InRelease file signatures.
{
"affected": [],
"aliases": [
"CVE-2016-1252"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-12-05T16:29:00Z",
"severity": "MODERATE"
},
"details": "The apt package in Debian jessie before 1.0.9.8.4, in Debian unstable before 1.4~beta2, in Ubuntu 14.04 LTS before 1.0.1ubuntu2.17, in Ubuntu 16.04 LTS before 1.2.15ubuntu0.2, and in Ubuntu 16.10 before 1.3.2ubuntu0.1 allows man-in-the-middle attackers to bypass a repository-signing protection mechanism by leveraging improper error handling when validating InRelease file signatures.",
"id": "GHSA-53rm-7gr9-9hfx",
"modified": "2025-04-20T03:49:24Z",
"published": "2022-05-13T01:23:34Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2016-1252"
},
{
"type": "WEB",
"url": "https://bugs.chromium.org/p/project-zero/issues/detail?id=1020"
},
{
"type": "WEB",
"url": "https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1647467"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2016/dsa-3733"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/exploits/40916"
},
{
"type": "WEB",
"url": "http://packetstormsecurity.com/files/140145/apt-Repository-Signing-Bypass.html"
},
{
"type": "WEB",
"url": "http://www.ubuntu.com/usn/USN-3156-1"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-53X2-3MX9-Q64R
Vulnerability from github – Published: 2022-05-13 01:01 – Updated: 2022-05-13 01:01An exploitable information disclosure vulnerability exists in the crash handler of the hubCore binary of the Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17. When hubCore crashes, Google Breakpad is used to record minidumps, which are sent over an insecure HTTPS connection to the backtrace.io service, leading to the exposure of sensitive data. An attacker can impersonate the remote backtrace.io server in order to trigger this vulnerability.
{
"affected": [],
"aliases": [
"CVE-2018-3927"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-08-27T15:29:00Z",
"severity": "MODERATE"
},
"details": "An exploitable information disclosure vulnerability exists in the crash handler of the hubCore binary of the Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17. When hubCore crashes, Google Breakpad is used to record minidumps, which are sent over an insecure HTTPS connection to the backtrace.io service, leading to the exposure of sensitive data. An attacker can impersonate the remote backtrace.io server in order to trigger this vulnerability.",
"id": "GHSA-53x2-3mx9-q64r",
"modified": "2022-05-13T01:01:56Z",
"published": "2022-05-13T01:01:56Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-3927"
},
{
"type": "WEB",
"url": "https://talosintelligence.com/vulnerability_reports/TALOS-2018-0594"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-53XR-2XX3-73WM
Vulnerability from github – Published: 2026-02-03 03:30 – Updated: 2026-02-19 18:31The DDNS function uses an insecure HTTP connection or fails to validate the SSL/TLS certificate when querying an external server for the device's WAN IP address. An unauthenticated remote attacker can perform a Man-in-the-Middle (MitM) attack to spoof the response, leading the device to update its DDNS record with an incorrect IP address. Affected products and versions include: from ADM 4.1.0 through ADM 4.3.3.ROF1 as well as from ADM 5.0.0 through ADM 5.1.1.RCI1.
{
"affected": [],
"aliases": [
"CVE-2026-24934"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-02-03T03:15:53Z",
"severity": "MODERATE"
},
"details": "The DDNS function uses an insecure HTTP connection or fails to validate the SSL/TLS certificate when querying an external server for the device\u0027s WAN IP address. An unauthenticated remote attacker can perform a Man-in-the-Middle (MitM) attack to spoof the response, leading the device to update its DDNS record with an incorrect IP address.\nAffected products and versions include: from ADM 4.1.0 through ADM 4.3.3.ROF1 as well as from ADM 5.0.0 through ADM 5.1.1.RCI1.",
"id": "GHSA-53xr-2xx3-73wm",
"modified": "2026-02-19T18:31:43Z",
"published": "2026-02-03T03:30:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-24934"
},
{
"type": "WEB",
"url": "https://www.asustor.com/security/security_advisory_detail?id=50"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/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-5492-XCW7-P95W
Vulnerability from github – Published: 2022-05-17 02:38 – Updated: 2022-05-17 02:38Late TLS certificate verification in WebKitGTK+ prior to 2.6.6 allows remote attackers to view a secure HTTP request, including, for example, secure cookies.
{
"affected": [],
"aliases": [
"CVE-2015-2330"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-03-10T02:59:00Z",
"severity": "HIGH"
},
"details": "Late TLS certificate verification in WebKitGTK+ prior to 2.6.6 allows remote attackers to view a secure HTTP request, including, for example, secure cookies.",
"id": "GHSA-5492-xcw7-p95w",
"modified": "2022-05-17T02:38:49Z",
"published": "2022-05-17T02:38:49Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2015-2330"
},
{
"type": "WEB",
"url": "https://bugs.webkit.org/show_bug.cgi?id=142244"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/201706-15"
},
{
"type": "WEB",
"url": "https://trac.webkit.org/changeset/181074"
},
{
"type": "WEB",
"url": "https://webkitgtk.org/security/WSA-2015-0002.html"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2015/03/17/11"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2015/03/18/4"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-556X-QJJ2-PH6Q
Vulnerability from github – Published: 2022-05-24 19:21 – Updated: 2022-05-24 19:21The D-Link DIR-615 device before v20.12PTb04 doesn't use SSL for any of the authenticated pages. Also, it doesn't allow the user to generate his own SSL Certificate. An attacker can simply monitor network traffic to steal a user's credentials and/or credentials of users being added while sniffing the traffic.
{
"affected": [],
"aliases": [
"CVE-2017-7406"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-07-07T12:29:00Z",
"severity": "CRITICAL"
},
"details": "The D-Link DIR-615 device before v20.12PTb04 doesn\u0027t use SSL for any of the authenticated pages. Also, it doesn\u0027t allow the user to generate his own SSL Certificate. An attacker can simply monitor network traffic to steal a user\u0027s credentials and/or credentials of users being added while sniffing the traffic.",
"id": "GHSA-556x-qjj2-ph6q",
"modified": "2022-05-24T19:21:20Z",
"published": "2022-05-24T19:21:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-7406"
},
{
"type": "WEB",
"url": "https://www.qualys.com/2017/03/12/qsa-2017-03-12/qsa-2017-03-12.pdf"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-557R-Q6MF-6MFM
Vulnerability from github – Published: 2022-05-13 01:27 – Updated: 2022-05-13 01:27Google Chrome before 17.0.963.56 allows remote attackers to cause a denial of service (application crash) via an empty X.509 certificate.
{
"affected": [],
"aliases": [
"CVE-2011-3024"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2012-02-16T20:55:00Z",
"severity": "MODERATE"
},
"details": "Google Chrome before 17.0.963.56 allows remote attackers to cause a denial of service (application crash) via an empty X.509 certificate.",
"id": "GHSA-557r-q6mf-6mfm",
"modified": "2022-05-13T01:27:15Z",
"published": "2022-05-13T01:27:15Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2011-3024"
},
{
"type": "WEB",
"url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14891"
},
{
"type": "WEB",
"url": "http://code.google.com/p/chromium/issues/detail?id=112451"
},
{
"type": "WEB",
"url": "http://googlechromereleases.blogspot.com/2012/02/chrome-stable-update.html"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/48016"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-55R6-XW9H-2C48
Vulnerability from github – Published: 2023-04-11 12:30 – Updated: 2023-04-11 12:30A vulnerability has been identified in SIMATIC IPC1047 (All versions), SIMATIC IPC1047E (All versions with maxView Storage Manager < 4.09.00.25611 on Windows), SIMATIC IPC647D (All versions), SIMATIC IPC647E (All versions with maxView Storage Manager < 4.09.00.25611 on Windows), SIMATIC IPC847D (All versions), SIMATIC IPC847E (All versions with maxView Storage Manager < 4.09.00.25611 on Windows). The Adaptec Maxview application on affected devices is using a non-unique TLS certificate across installations to protect the communication from the local browser to the local application. A local attacker may use this key to decrypt intercepted local traffic between the browser and the application and could perform a man-in-the-middle attack in order to modify data in transit.
{
"affected": [],
"aliases": [
"CVE-2023-23588"
],
"database_specific": {
"cwe_ids": [
"CWE-200",
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-04-11T10:15:00Z",
"severity": "MODERATE"
},
"details": "A vulnerability has been identified in SIMATIC IPC1047 (All versions), SIMATIC IPC1047E (All versions with maxView Storage Manager \u003c 4.09.00.25611 on Windows), SIMATIC IPC647D (All versions), SIMATIC IPC647E (All versions with maxView Storage Manager \u003c 4.09.00.25611 on Windows), SIMATIC IPC847D (All versions), SIMATIC IPC847E (All versions with maxView Storage Manager \u003c 4.09.00.25611 on Windows). The Adaptec Maxview application on affected devices is using a non-unique TLS certificate across installations to protect the communication from the local browser to the local application.\nA local attacker may use this key to decrypt intercepted local traffic between the browser and the application and could perform a man-in-the-middle attack in order to modify data in transit.",
"id": "GHSA-55r6-xw9h-2c48",
"modified": "2023-04-11T12:30:26Z",
"published": "2023-04-11T12:30:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-23588"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-511182.pdf"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-568W-37QX-3QC6
Vulnerability from github – Published: 2026-05-07 15:38 – Updated: 2026-10-02 03:31A flaw was found in gnutls. This vulnerability occurs because permitted name constraints were incorrectly ignored when previous Certificate Authorities (CAs) only had excluded name constraints. A remote attacker could exploit this to bypass critical name constraint checks during certificate validation. This bypass could lead to the acceptance of invalid certificates, potentially enabling spoofing or man-in-the-middle attacks against affected systems.
{
"affected": [],
"aliases": [
"CVE-2026-42011"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-07T15:16:09Z",
"severity": "HIGH"
},
"details": "A flaw was found in gnutls. This vulnerability occurs because permitted name constraints were incorrectly ignored when previous Certificate Authorities (CAs) only had excluded name constraints. A remote attacker could exploit this to bypass critical name constraint checks during certificate validation. This bypass could lead to the acceptance of invalid certificates, potentially enabling spoofing or man-in-the-middle attacks against affected systems.",
"id": "GHSA-568w-37qx-3qc6",
"modified": "2026-10-02T03:31:01Z",
"published": "2026-05-07T15:38:42Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42011"
},
{
"type": "WEB",
"url": "https://www.gnutls.org/security-new.html#GNUTLS-SA-2026-04-29-6"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467437"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2026-42011"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:74674"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:72502"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:60019"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:59831"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:58981"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:57483"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:56853"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:43575"
},
{
"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-2026:33125"
},
{
"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:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-56CM-RMMQ-HQPV
Vulnerability from github – Published: 2022-05-24 22:01 – Updated: 2022-05-24 22:01In Logstash versions after 6.4.0 and before 6.8.15 and 7.12.0 a TLS certificate validation flaw was found in the monitoring feature. When specifying a trusted server CA certificate Logstash would not properly verify the certificate returned by the monitoring server. This could result in a man in the middle style attack against the Logstash monitoring data.
{
"affected": [],
"aliases": [
"CVE-2021-22138"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-05-13T18:15:00Z",
"severity": "LOW"
},
"details": "In Logstash versions after 6.4.0 and before 6.8.15 and 7.12.0 a TLS certificate validation flaw was found in the monitoring feature. When specifying a trusted server CA certificate Logstash would not properly verify the certificate returned by the monitoring server. This could result in a man in the middle style attack against the Logstash monitoring data.",
"id": "GHSA-56cm-rmmq-hqpv",
"modified": "2022-05-24T22:01:37Z",
"published": "2022-05-24T22:01:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-22138"
},
{
"type": "WEB",
"url": "https://discuss.elastic.co/t/elastic-stack-7-12-0-and-6-8-15-security-update/268125"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20210629-0001"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
}
]
}
Mitigation
Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.
Mitigation
If certificate pinning is being used, ensure that all relevant properties of the certificate are fully validated before the certificate is pinned, including the hostname.
CAPEC-459: Creating a Rogue Certification Authority Certificate
An adversary exploits a weakness resulting from using a hashing algorithm with weak collision resistance to generate certificate signing requests (CSR) that contain collision blocks in their "to be signed" parts. The adversary submits one CSR to be signed by a trusted certificate authority then uses the signed blob to make a second certificate appear signed by said certificate authority. Due to the hash collision, both certificates, though different, hash to the same value and so the signed blob works just as well in the second certificate. The net effect is that the adversary's second X.509 certificate, which the Certification Authority has never seen, is now signed and validated by that Certification Authority.
CAPEC-475: Signature Spoofing by Improper Validation
An adversary exploits a cryptographic weakness in the signature verification algorithm implementation to generate a valid signature without knowing the key.