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{"cveTags": [], "descriptions": [{"lang": "en", "value": "PAM-PKCS#11 is a Linux-PAM login module that allows a X.509 certificate based user login. Prior to version 0.6.13, if cert_policy is set to none (the default value), then pam_pkcs11 will only check if the user is capable of logging into the token. An attacker may create a different token with the user's public data (e.g. the user's certificate) and a PIN known to the attacker. If no signature with the private key is required, then the attacker may now login as user with that created token. The default to *not* check the private key's signature has been changed with commit commi6638576892b59a99389043c90a1e7dd4d783b921, so that all versions starting with pam_pkcs11-0.6.0 should be affected. As a workaround, in `pam_pkcs11.conf`, set at least `cert_policy = signature;`."}, {"lang": "es", "value": "PAM-PKCS#11 es un m\u00f3dulo de inicio de sesi\u00f3n de Linux-PAM que permite un inicio de sesi\u00f3n de usuario basado en certificado X.509. Antes de la versi\u00f3n 0.6.13, si cert_policy se configuraba en none (el valor predeterminado), entonces pam_pkcs11 solo verificaba si el usuario puede iniciar sesi\u00f3n en el token. Un atacante puede crear un token diferente con los datos p\u00fablicos del usuario (por ejemplo, el certificado del usuario) y un PIN conocido por el atacante. Si no se requiere una firma con la clave privada, entonces el atacante puede iniciar sesi\u00f3n como usuario con ese token creado. El valor predeterminado de *no* verificar la firma de la clave privada se ha cambiado con el commit commi6638576892b59a99389043c90a1e7dd4d783b921, por lo que todas las versiones que comiencen con pam_pkcs11-0.6.0 deber\u00edan verse afectadas. Como workaround, en `pam_pkcs11.conf`, establezca al menos `cert_policy = signature;`."}], "id": "CVE-2025-24032", "lastModified": "2026-04-15T00:35:42.020", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 9.2, "baseSeverity": "CRITICAL", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:L/SI:L/SA:L/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", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2025-02-10T16:15:39.153", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/OpenSC/pam_pkcs11/commit/470263258d1ac59c5eade439c4d9caba0097e6e6"}, {"source": "security-advisories@github.com", "url": "https://github.com/OpenSC/pam_pkcs11/commit/b665b287ff955bbbd9539252ff9f9e2754c3fb48"}, {"source": "security-advisories@github.com", "url": "https://github.com/OpenSC/pam_pkcs11/commit/d9530167966a77115db6e885d459382a2e52ee9e"}, {"source": "security-advisories@github.com", "url": "https://github.com/OpenSC/pam_pkcs11/releases/tag/pam_pkcs11-0.6.13"}, {"source": "security-advisories@github.com", "url": "https://github.com/OpenSC/pam_pkcs11/security/advisories/GHSA-8r8p-7mgp-vf56"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/02/msg00021.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.vicarius.io/vsociety/posts/cve-2025-24032-detect-vulnerability-in-linux-pam-module"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.vicarius.io/vsociety/posts/cve-2025-24032-mitigate-linux-pam-module-vulnerability"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-287"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "pam_pkcs11: PAM-PKCS#11 vulnerable to authentication bypass with default value for `cert_policy` (`none`)", "id": "2344664", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2344664"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L", "status": "draft"}, "cwe": "CWE-287", "details": ["PAM-PKCS#11 is a Linux-PAM login module that allows a X.509 certificate based user login. Prior to version 0.6.13, if cert_policy is set to none (the default value), then pam_pkcs11 will only check if the user is capable of logging into the token. An attacker may create a different token with the user's public data (e.g. the user's certificate) and a PIN known to the attacker. If no signature with the private key is required, then the attacker may now login as user with that created token. The default to *not* check the private key's signature has been changed with commit commi6638576892b59a99389043c90a1e7dd4d783b921, so that all versions starting with pam_pkcs11-0.6.0 should be affected. As a workaround, in `pam_pkcs11.conf`, set at least `cert_policy = signature;`.", "A flaw was found in the pam_pkcs11 Linux-PAM login module. If the `cert_policy` is set to none, which is the default value, then pam_pkcs11 will only check if the user is capable of logging into the token. This flaw allows an attacker to create a different token with the user's public data, for example, the user's certificate and a PIN known to the attacker. If no signature with the private key is required, the attacker can log in as a user with that created token."], "mitigation": {"lang": "en:us", "value": "Restrict the cert_policy value to `signature` in the pam_pkcs11.conf configuration file (`cert_policy = signature`)."}, "name": "CVE-2025-24032", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "pam_pkcs11", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Will not fix", "package_name": "pam_pkcs11", "product_name": "Red Hat Enterprise Linux 7"}], "public_date": "2025-02-10T15:43:47Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-24032\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-24032\nhttps://github.com/OpenSC/pam_pkcs11/commit/470263258d1ac59c5eade439c4d9caba0097e6e6\nhttps://github.com/OpenSC/pam_pkcs11/commit/b665b287ff955bbbd9539252ff9f9e2754c3fb48\nhttps://github.com/OpenSC/pam_pkcs11/commit/d9530167966a77115db6e885d459382a2e52ee9e\nhttps://github.com/OpenSC/pam_pkcs11/releases/tag/pam_pkcs11-0.6.13\nhttps://github.com/OpenSC/pam_pkcs11/security/advisories/GHSA-8r8p-7mgp-vf56"], "statement": "This vulnerability is of moderate severity because it only applies when the configuration explicitly disables signature verification (cert_policy = none), which is not a secure best practice. The attack requires an adversary to create a fake token using the victim\u2019s public certificate and a known PIN, but it does not compromise the private key itself. Since private key possession is typically required for strong authentication, systems enforcing proper certificate verification (including signature validation) remain unaffected. Additionally, RHEL is not vulnerable by default, further reducing the real-world impact.", "threat_severity": "Moderate"}

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