CVE-2019-12209

Published: 04 June 2019

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.

Priority

Medium

CVSS 3 base score: 7.5

Status

Package Release Status
pam-u2f
Launchpad, Ubuntu, Debian
Upstream
Released (1.0.8)
Ubuntu 21.10 (Impish Indri) Not vulnerable
(1.0.8-1)
Ubuntu 21.04 (Hirsute Hippo) Not vulnerable
(1.0.8-1)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(1.0.8-1)
Ubuntu 18.04 LTS (Bionic Beaver) Needed

Ubuntu 16.04 ESM (Xenial Xerus) Ignored
(end of standard support, was needed)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist