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.

References

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZCGU6UQLI3ZTW3UYCTMQW7VDL5M4LCWR/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5FOR4ADC356JPCHAJI5UXZORLC3VNBPS/

https://github.com/Yubico/pam-u2f/commit/7db3386fcdb454e33a3ea30dcfb8e8960d4c3aa3

https://developers.yubico.com/pam-u2f/Release_Notes.html

http://www.openwall.com/lists/oss-security/2019/06/05/1

http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00018.html

http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00012.html

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3