fkie_cve-2025-24031
Vulnerability from fkie_nvd
Published
2025-02-10 16:15
Modified
2025-02-10 16:15
Severity ?
Summary
PAM-PKCS#11 is a Linux-PAM login module that allows a X.509 certificate based user login. In versions 0.6.12 and prior, the pam_pkcs11 module segfaults when a user presses ctrl-c/ctrl-d when they are asked for a PIN. When a user enters no PIN at all, `pam_get_pwd` will never initialize the password buffer pointer and as such `cleanse` will try to dereference an uninitialized pointer. On my system this pointer happens to have the value 3 most of the time when running sudo and as such it will segfault. The most likely impact to a system affected by this issue is an availability impact due to a daemon that uses PAM crashing. As of time of publication, a patch for the issue is unavailable.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "PAM-PKCS#11 is a Linux-PAM login module that allows a X.509 certificate based user login. In versions 0.6.12 and prior, the pam_pkcs11 module segfaults when a user presses ctrl-c/ctrl-d when they are asked for a PIN. When a user enters no PIN at all, `pam_get_pwd` will never initialize the password buffer pointer and as such `cleanse` will try to dereference an uninitialized pointer. On my system this pointer happens to have the value 3 most of the time when running sudo and as such it will segfault. The most likely impact to a system affected by this issue is an availability impact due to a daemon that uses PAM crashing. As of time of publication, a patch for the issue is unavailable."
},
{
"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. En las versiones 0.6.12 y anteriores, el m\u00f3dulo pam_pkcs11 genera un error de segmentaci\u00f3n cuando un usuario presiona Ctrl-C/Ctrl-D cuando se le solicita un PIN. Cuando un usuario no ingresa ning\u00fan PIN, `pam_get_pwd` nunca inicializar\u00e1 el puntero del b\u00fafer de contrase\u00f1a y, como tal, `cleanse` intentar\u00e1 desreferenciar un puntero no inicializado. En mi sistema, este puntero tiene el valor 3 la mayor parte del tiempo cuando se ejecuta sudo y, como tal, generar\u00e1 un error de segmentaci\u00f3n. El impacto m\u00e1s probable en un sistema afectado por este problema es un impacto en la disponibilidad debido a un bloqueo de un daemon que usa PAM. Al momento de la publicaci\u00f3n, no hay disponible un parche para el problema. "
}
],
"id": "CVE-2025-24031",
"lastModified": "2025-02-10T16:15:38.990",
"metrics": {
"cvssMetricV40": [
{
"cvssData": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "LOCAL",
"availabilityRequirement": "NOT_DEFINED",
"baseScore": 5.1,
"baseSeverity": "MEDIUM",
"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": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/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": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"source": "security-advisories@github.com",
"type": "Secondary"
}
]
},
"published": "2025-02-10T16:15:38.990",
"references": [
{
"source": "security-advisories@github.com",
"url": "https://github.com/OpenSC/pam_pkcs11/blob/bb2e3f3a95e44fdf44b0d5a4b377db3179021380/src/pam_pkcs11/pam_pkcs11.c#L211"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/OpenSC/pam_pkcs11/blob/bb2e3f3a95e44fdf44b0d5a4b377db3179021380/src/pam_pkcs11/pam_pkcs11.c#L797"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/OpenSC/pam_pkcs11/security/advisories/GHSA-wvr3-c9x3-9mff"
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"url": "https://github.com/OpenSC/pam_pkcs11/security/advisories/GHSA-wvr3-c9x3-9mff"
}
],
"sourceIdentifier": "security-advisories@github.com",
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-476"
}
],
"source": "security-advisories@github.com",
"type": "Primary"
}
]
}
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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.
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