Vulnerability in Yubico Pam-U2f
CVE-2019-12209
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.028 (86.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 86.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.029 · newest: 0.028 · change: -0.001
Affected products
- Yubico Pam-U2f — versions 1.0.7
Weakness classification (CWE)
References
- github.com/Yubico/pam-u2f/commit/7db3386fcdb454e33a3ea30dcfb8e8960d4c3aa3 (Patch, Third Party Advisory)
- developers.yubico.com/pam-u2f/Release_Notes.html (Release Notes, Vendor Advisory)
- www.openwall.com/lists/oss-security/2019/06/05/1 (mailing-list, Exploit, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2019-07/msg00012.html (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2019-07/msg00018.html (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2019-12209?
- CVE-2019-12209 is a high-severity vulnerability in Yubico Pam-U2f, classified under Improper Link Resolution Before File Access. CVSS score: 7.5/10. Published 2019-06-04.
- How severe is CVE-2019-12209?
- High severity. CVSS v3 base score is 7.5 out of 10.