CWE-295
AllowedImproper Certificate Validation
Abstraction: Base · Status: Draft
The product does not validate, or incorrectly validates, a certificate.
2378 vulnerabilities reference this CWE, most recent first.
GHSA-5RXX-PVXX-JW4M
Vulnerability from github – Published: 2022-05-17 00:34 – Updated: 2022-05-17 00:34Smartphone Passbook 1.0.0 does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to obtain sensitive information from encrypted communications via a crafted certificate.
{
"affected": [],
"aliases": [
"CVE-2015-0874"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-09-26T14:29:00Z",
"severity": "MODERATE"
},
"details": "Smartphone Passbook 1.0.0 does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to obtain sensitive information from encrypted communications via a crafted certificate.",
"id": "GHSA-5rxx-pvxx-jw4m",
"modified": "2022-05-17T00:34:21Z",
"published": "2022-05-17T00:34:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2015-0874"
},
{
"type": "WEB",
"url": "http://jvn.jp/en/jp/JVN14522790/index.html"
},
{
"type": "WEB",
"url": "http://jvndb.jvn.jp/en/contents/2015/JVNDB-2015-000015.html"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/72597"
}
],
"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-5V44-XCM9-R9JW
Vulnerability from github – Published: 2022-05-13 01:36 – Updated: 2022-05-13 01:36In curl and libcurl 7.52.0 to and including 7.53.1, libcurl would attempt to resume a TLS session even if the client certificate had changed. That is unacceptable since a server by specification is allowed to skip the client certificate check on resume, and may instead use the old identity which was established by the previous certificate (or no certificate). libcurl supports by default the use of TLS session id/ticket to resume previous TLS sessions to speed up subsequent TLS handshakes. They are used when for any reason an existing TLS connection couldn't be kept alive to make the next handshake faster. This flaw is a regression and identical to CVE-2016-5419 reported on August 3rd 2016, but affecting a different version range.
{
"affected": [],
"aliases": [
"CVE-2017-7468"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-07-16T13:29:00Z",
"severity": "HIGH"
},
"details": "In curl and libcurl 7.52.0 to and including 7.53.1, libcurl would attempt to resume a TLS session even if the client certificate had changed. That is unacceptable since a server by specification is allowed to skip the client certificate check on resume, and may instead use the old identity which was established by the previous certificate (or no certificate). libcurl supports by default the use of TLS session id/ticket to resume previous TLS sessions to speed up subsequent TLS handshakes. They are used when for any reason an existing TLS connection couldn\u0027t be kept alive to make the next handshake faster. This flaw is a regression and identical to CVE-2016-5419 reported on August 3rd 2016, but affecting a different version range.",
"id": "GHSA-5v44-xcm9-r9jw",
"modified": "2022-05-13T01:36:20Z",
"published": "2022-05-13T01:36:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-7468"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7468"
},
{
"type": "WEB",
"url": "https://curl.haxx.se/docs/adv_20170419.html"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/201709-14"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/97962"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id/1038341"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-5V4V-696P-48JF
Vulnerability from github – Published: 2022-05-17 02:34 – Updated: 2022-05-17 02:34An issue was discovered in certain Apple products. iOS before 10.3.2 is affected. The issue involves the "Security" component. It allows attackers to bypass intended access restrictions via an untrusted certificate.
{
"affected": [],
"aliases": [
"CVE-2017-2498"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-05-22T05:29:00Z",
"severity": "HIGH"
},
"details": "An issue was discovered in certain Apple products. iOS before 10.3.2 is affected. The issue involves the \"Security\" component. It allows attackers to bypass intended access restrictions via an untrusted certificate.",
"id": "GHSA-5v4v-696p-48jf",
"modified": "2022-05-17T02:34:54Z",
"published": "2022-05-17T02:34:54Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-2498"
},
{
"type": "WEB",
"url": "https://support.apple.com/HT207798"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/98479"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id/1038485"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-5V5P-5XXR-9XF8
Vulnerability from github – Published: 2026-09-09 06:31 – Updated: 2026-09-09 06:31An issue was discovered in the mirage-crypto-ec function before 2.2.0 for OCaml. The ECDSA functions {P256,P384,P521}.Dsa.pub_of_octets accept 0x00, the encoding of the point at infinity, as a public key. With that public key, signatures can be forged without a private key.
{
"affected": [],
"aliases": [
"CVE-2026-87733"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-09T05:18:20Z",
"severity": "MODERATE"
},
"details": "An issue was discovered in the mirage-crypto-ec function before 2.2.0 for OCaml. The ECDSA functions {P256,P384,P521}.Dsa.pub_of_octets accept 0x00, the encoding of the point at infinity, as a public key. With that public key, signatures can be forged without a private key.",
"id": "GHSA-5v5p-5xxr-9xf8",
"modified": "2026-09-09T06:31:39Z",
"published": "2026-09-09T06:31:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-87733"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/OSEC-2026-13"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-5V8J-JFMM-6X86
Vulnerability from github – Published: 2023-04-29 00:30 – Updated: 2025-11-04 00:30CPAN.pm before 2.35 does not verify TLS certificates when downloading distributions over HTTPS.
{
"affected": [],
"aliases": [
"CVE-2023-31484"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-04-29T00:15:09Z",
"severity": "HIGH"
},
"details": "CPAN.pm before 2.35 does not verify TLS certificates when downloading distributions over HTTPS.",
"id": "GHSA-5v8j-jfmm-6x86",
"modified": "2025-11-04T00:30:37Z",
"published": "2023-04-29T00:30:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-31484"
},
{
"type": "WEB",
"url": "https://github.com/andk/cpanpm/pull/175"
},
{
"type": "WEB",
"url": "https://blog.hackeriet.no/perl-http-tiny-insecure-tls-default-affects-cpan-modules"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2024/10/msg00017.html"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BM6UW55CNFUTNGD5ZRKGUKKKFDJGMFHL"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LEGCEOKFJVBJ2QQ6S2H4NAEWTUERC7SB"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BM6UW55CNFUTNGD5ZRKGUKKKFDJGMFHL"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LEGCEOKFJVBJ2QQ6S2H4NAEWTUERC7SB"
},
{
"type": "WEB",
"url": "https://metacpan.org/dist/CPAN/changes"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20240621-0007"
},
{
"type": "WEB",
"url": "https://www.openwall.com/lists/oss-security/2023/04/18/14"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2023/04/29/1"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2023/05/03/3"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2023/05/03/5"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2023/05/07/2"
}
],
"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:H",
"type": "CVSS_V3"
}
]
}
GHSA-5VVH-22MV-PF93
Vulnerability from github – Published: 2022-03-29 00:01 – Updated: 2022-04-05 00:00The client applications in 3CX on Windows, the 3CX app for iOS, and the 3CX application for Android through 2022-03-17 lack SSL certificate validation.
{
"affected": [],
"aliases": [
"CVE-2021-45490"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-03-28T02:15:00Z",
"severity": "CRITICAL"
},
"details": "The client applications in 3CX on Windows, the 3CX app for iOS, and the 3CX application for Android through 2022-03-17 lack SSL certificate validation.",
"id": "GHSA-5vvh-22mv-pf93",
"modified": "2022-04-05T00:00:58Z",
"published": "2022-03-29T00:01:14Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-45490"
},
{
"type": "WEB",
"url": "https://packetstormsecurity.com/files/166376/3CX-Client-Missing-TLS-Validation.html"
},
{
"type": "WEB",
"url": "https://www.3cx.com/community/forums/posts-articles-news"
}
],
"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:N",
"type": "CVSS_V3"
}
]
}
GHSA-5VXF-PM6W-9VFM
Vulnerability from github – Published: 2022-05-13 01:31 – Updated: 2022-05-13 01:31A vulnerability in the Identity Services Engine (ISE) integration feature of Cisco Prime Infrastructure (PI) could allow an unauthenticated, remote attacker to perform a man-in-the-middle attack against the Secure Sockets Layer (SSL) tunnel established between ISE and PI. The vulnerability is due to improper validation of the server SSL certificate when establishing the SSL tunnel with ISE. An attacker could exploit this vulnerability by using a crafted SSL certificate and could then intercept communications between the ISE and PI. A successful exploit could allow the attacker to view and alter potentially sensitive information that the ISE maintains about clients that are connected to the network. This vulnerability affects Cisco Prime Infrastructure Software Releases 2.2 through 3.4.0 when the PI server is integrated with ISE, which is disabled by default.
{
"affected": [],
"aliases": [
"CVE-2019-1659"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-02-21T15:29:00Z",
"severity": "HIGH"
},
"details": "A vulnerability in the Identity Services Engine (ISE) integration feature of Cisco Prime Infrastructure (PI) could allow an unauthenticated, remote attacker to perform a man-in-the-middle attack against the Secure Sockets Layer (SSL) tunnel established between ISE and PI. The vulnerability is due to improper validation of the server SSL certificate when establishing the SSL tunnel with ISE. An attacker could exploit this vulnerability by using a crafted SSL certificate and could then intercept communications between the ISE and PI. A successful exploit could allow the attacker to view and alter potentially sensitive information that the ISE maintains about clients that are connected to the network. This vulnerability affects Cisco Prime Infrastructure Software Releases 2.2 through 3.4.0 when the PI server is integrated with ISE, which is disabled by default.",
"id": "GHSA-5vxf-pm6w-9vfm",
"modified": "2022-05-13T01:31:28Z",
"published": "2022-05-13T01:31:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-1659"
},
{
"type": "WEB",
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190220-prime-validation"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/107092"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-5W52-QRHJ-GRG8
Vulnerability from github – Published: 2022-05-24 17:00 – Updated: 2022-05-24 17:00Sensitive information disclosure vulnerability resulting from a lack of certificate validation during the File-Based Backup and Restore operations of VMware vCenter Server Appliance (6.7 before 6.7u3a and 6.5 before 6.5u3d) may allow a malicious actor to intercept sensitive data in transit over FTPS and HTTPS. A malicious actor with man-in-the-middle positioning between vCenter Server Appliance and a backup target may be able to intercept sensitive data in transit during File-Based Backup and Restore operations.
{
"affected": [],
"aliases": [
"CVE-2019-5537"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-10-28T16:15:00Z",
"severity": "MODERATE"
},
"details": "Sensitive information disclosure vulnerability resulting from a lack of certificate validation during the File-Based Backup and Restore operations of VMware vCenter Server Appliance (6.7 before 6.7u3a and 6.5 before 6.5u3d) may allow a malicious actor to intercept sensitive data in transit over FTPS and HTTPS. A malicious actor with man-in-the-middle positioning between vCenter Server Appliance and a backup target may be able to intercept sensitive data in transit during File-Based Backup and Restore operations.",
"id": "GHSA-5w52-qrhj-grg8",
"modified": "2022-05-24T17:00:00Z",
"published": "2022-05-24T17:00:00Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-5537"
},
{
"type": "WEB",
"url": "https://www.vmware.com/security/advisories/VMSA-2019-0018.html"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-5WJ7-RHF5-HQX4
Vulnerability from github – Published: 2022-05-13 01:01 – Updated: 2025-04-20 03:36An exploitable free of a stack pointer vulnerability exists in the x509 certificate parsing code of ARM mbed TLS before 1.3.19, 2.x before 2.1.7, and 2.4.x before 2.4.2. A specially crafted x509 certificate, when parsed by mbed TLS library, can cause an invalid free of a stack pointer leading to a potential remote code execution. In order to exploit this vulnerability, an attacker can act as either a client or a server on a network to deliver malicious x509 certificates to vulnerable applications.
{
"affected": [],
"aliases": [
"CVE-2017-2784"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-04-20T18:59:00Z",
"severity": "HIGH"
},
"details": "An exploitable free of a stack pointer vulnerability exists in the x509 certificate parsing code of ARM mbed TLS before 1.3.19, 2.x before 2.1.7, and 2.4.x before 2.4.2. A specially crafted x509 certificate, when parsed by mbed TLS library, can cause an invalid free of a stack pointer leading to a potential remote code execution. In order to exploit this vulnerability, an attacker can act as either a client or a server on a network to deliver malicious x509 certificates to vulnerable applications.",
"id": "GHSA-5wj7-rhf5-hqx4",
"modified": "2025-04-20T03:36:21Z",
"published": "2022-05-13T01:01:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-2784"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/201706-18"
},
{
"type": "WEB",
"url": "https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2017-01"
},
{
"type": "WEB",
"url": "http://www.talosintelligence.com/reports/TALOS-2017-0274"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-5XCX-XJWC-J24X
Vulnerability from github – Published: 2025-11-17 06:30 – Updated: 2025-11-17 06:30Improper certificate validation vulnerability exists in 'デジラアプリ' App for iOS prior to ver.80.10.00. If this vulnerability is exploited, a man-in-the-middle attack may allow an attacker to eavesdrop on and/or tamper with an encrypted communication.
{
"affected": [],
"aliases": [
"CVE-2025-60022"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-11-17T06:15:44Z",
"severity": "LOW"
},
"details": "Improper certificate validation vulnerability exists in \u0027\u30c7\u30b8\u30e9\u30a2\u30d7\u30ea\u0027 App for iOS prior to ver.80.10.00. If this vulnerability is exploited, a man-in-the-middle attack may allow an attacker to eavesdrop on and/or tamper with an encrypted communication.",
"id": "GHSA-5xcx-xjwc-j24x",
"modified": "2025-11-17T06:30:15Z",
"published": "2025-11-17T06:30:15Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-60022"
},
{
"type": "WEB",
"url": "https://jvn.jp/en/jp/JVN54005037"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/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"
}
]
}
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.