Debian: CVE-2025-24032: pam-pkcs11 -- security update

Debian: CVE-2025-24032: pam-pkcs11 -- security update

Severity

4

CVSS

(AV:L/AC:M/Au:N/C:P/I:P/A:P)

Published

02/10/2025

Created

02/15/2025

Added

02/14/2025

Modified

02/14/2025

Description

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;`.

Solution(s)

• debian-upgrade-pam-pkcs11

References

• https://attackerkb.com/topics/cve-2025-24032
• CVE - 2025-24032
• DSA-5864-1