Yubico pam-u2f: Local PIN Bypass vulnerability

Yubico pam-u2f: Local PIN Bypass vulnerability A vulnerability has been discovered in pam-u2f which could allow a local attacker to bypass PIN entry. pam_u2f 2022-08-10 2022-08-10 792270 local 1.1.1 1.1.1

Yubico pam-u2f is a PAM module for FIDO2 and U2F keys.

A logic issue in Yubico pam-u2f could result in the bypass of a PIN entry requirement when authenticating with FIDO2.

An attacker with local access to certain applications using pam-u2f for authentication could incorrectly successfully authenticate without entering the authentication PIN.

There is no known workaround at this time.

All Yubico pam-u2f users should upgrade to the latest version:


          # emerge --sync
          # emerge --ask --oneshot --verbose ">=sys-auth/pam_u2f-1.1.1"

CVE-2021-31924 YSA-2021-03 ajak ajak