CVE-2019-12209: Yubico Pam-u2f

High severity, CVSS 7.5. EPSS: 2.8% chance of exploitation in the next 30 days.

Yubico pam-u2f 1.0.7 attempts parsing of the configured authfile (default $HOME/.config/Yubico/u2f_keys) as root (unless openasuser was enabled), and does not properly verify that the path lacks symlinks pointing to other files on the system owned by root. If the debug option is enabled in the PAM configuration, part of the file contents of a symlink target will be logged, possibly revealing sensitive information.

Affected products

• Yubico Pam-u2f: version 1.0.7 only

Published 2019-06-04. Last modified 2026-06-17.