CVE-2019-12209

Name	CVE-2019-12209
Description	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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	930021

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
pam-u2f (PTS)	buster	1.0.7-1+deb10u1	fixed
	bookworm, bullseye	1.1.0-1.1	fixed
	sid, trixie	1.3.0-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
pam-u2f	source	buster	1.0.7-1+deb10u1
pam-u2f	source	(unstable)	1.0.8-1	low		930021

Notes

[stretch] - pam-u2f <no-dsa> (Minor issue)
https://github.com/Yubico/pam-u2f/commit/7db3386fcdb454e33a3ea30dcfb8e8960d4c3aa3
https://www.openwall.com/lists/oss-security/2019/06/05/1