ALT-PU-2025-2706-4 — pam

BDU:2025-01619

CRITICAL9.4

Уязвимость функции pam_sm_authenticate() модуля аутентификации PAM-PKCS#11 операционных систем Linux, позволяющая нарушителю обойти процедуру аутентификации и получить несанкционированный доступ к защищаемой информации

Published: 2025-02-17Modified: 2026-02-16

CVSS 3.xCRITICAL 9.4

CVSS:3.x/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

CVSS 2.0CRITICAL 9.7

CVSS:2.0/AV:N/AC:L/Au:N/C:C/I:C/A:P

References

CVE-2025-24531

BDU:2025-09007

CRITICAL10.0

Уязвимость модуля аутентификации PAM-PKCS#11 операционных систем Linux, позволяющая нарушителю обойти процесс аутентификации

Published: 2025-07-28Modified: 2026-02-16

CVSS 3.xCRITICAL 10.0

CVSS:3.x/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L

CVSS 2.0CRITICAL 9.7

CVSS:2.0/AV:N/AC:L/Au:N/C:C/I:C/A:P

References

CVE-2025-24032

CVE-2025-24032

CRITICAL9.2

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;`.

Published: 2025-02-10Modified: 2026-04-15

CVSS 4.0CRITICAL 9.2

CVSS:4.0/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

References

CVE-2025-24531

MEDIUM6.7

In OpenSC pam_pkcs11 before 0.6.13, pam_sm_authenticate() wrongly returns PAM_IGNORE in many error situations (such as an error triggered by a smartcard before login), allowing authentication bypass.

Published: 2026-01-16Modified: 2026-04-15

CVSS 3.xMEDIUM 6.7

CVSS:3.x/CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

References

Package update pam_pkcs11 in branch sisyphus

Closed issues (4)

Уязвимость модуля аутентификации PAM-PKCS#11 операционных систем Linux, позволяющая нарушителю обойти процесс аутентификации

In OpenSC pam_pkcs11 before 0.6.13, pam_sm_authenticate() wrongly returns PAM_IGNORE in many error situations (such as an error triggered by a smartcard before login), allowing authentication bypass.