Parsing of the configured authfile (default ~/.config/Yubico/u2f_keys) as root, 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.
Created pam-u2f tracking bugs for this issue:
Affects: fedora-all [bug 1736870]
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.