Privilege Escalation and Information Disclosure in Yubico pam-u2f 1.0.7

CVE-2019-12209 · MEDIUM Severity

AV:N/AC:L/AU:N/C:P/I:N/A:N

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.

Learn more about our Cis Benchmark Audit For Suse Linux Enterprise Server.