Improper Authentication Affecting yubico/pam-u2f package, versions [,1.3.1)
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- published15 Jan 2025
- disclosed15 Jan 2025
- creditMatthias Gerstner
Introduced: 15 Jan 2025
NewCVE-2025-23013 (opens in a new tab)How to fix?
Upgrade yubico/pam-u2f to version 1.3.1 or higher.
Overview
Affected versions of this package are vulnerable to Improper Authentication allowing authentication bypass in certain configurations. An attacker can gain elevated privileges by exploiting this vulnerability when they have access to the system as an unprivileged user and, depending on the configuration, may also need to know the user's password.
Workaround
If using libpam, an alternative solution could be to disable the nouserok option and mark “ignore” control values with the action “bad” for all references of pam-u2f in the PAM stack ([success=ok default=bad]). OpenPAM implementation does not support this flexibility.