Link Following Affecting libu2f-host0 package, versions <1.1.6-3.6.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-SLES150-LIBU2FHOST0-2746676
- published14 Apr 2022
- disclosed4 Jul 2019
Introduced: 4 Jul 2019
CVE-2019-12209 (opens in a new tab)How to fix?
Upgrade SLES:15.0 libu2f-host0 to version 1.1.6-3.6.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libu2f-host0 package and not the libu2f-host0 package as distributed by SLES.
See How to fix? for SLES:15.0 relevant fixed versions and status.
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://www.suse.com/security/cve/CVE-2019-12209.html
- https://bugzilla.suse.com/1087061
- https://bugzilla.suse.com/1135727
- https://bugzilla.suse.com/1135729
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5FOR4ADC356JPCHAJI5UXZORLC3VNBPS/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZCGU6UQLI3ZTW3UYCTMQW7VDL5M4LCWR/
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00012.html
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00018.html
- http://www.openwall.com/lists/oss-security/2019/06/05/1
- https://developers.yubico.com/pam-u2f/Release_Notes.html
- https://github.com/Yubico/pam-u2f/commit/7db3386fcdb454e33a3ea30dcfb8e8960d4c3aa3
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5FOR4ADC356JPCHAJI5UXZORLC3VNBPS/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZCGU6UQLI3ZTW3UYCTMQW7VDL5M4LCWR/