Auth bypass in Fedoraproject Selinux-Policy
CVE-2020-24612
An issue was discovered in the selinux-policy (aka Reference Policy) package 3.14 through 2020-08-24 because the .config/Yubico directory is mishandled. Consequently, when SELinux is in enforced mode, pam-u2f is not allowed to read the user's U2F configuration file. If configured with the nouserok option (the default when configured by the authselect tool), and that file cannot be read, the second factor is disabled. An attacker with only the knowledge of the password can then log in, bypassing 2FA.
Vulnerability class: Broken Authentication
EPSS: 0.003 (24.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Fedoraproject Selinux-policy
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Third Party Advisory, x_refsource_MISC, Issue Tracking)
- cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2020-24612?
- CVE-2020-24612 is a medium-severity vulnerability in Fedoraproject Selinux-Policy, classified under Improper Authentication. CVSS score: 6.7/10. Published 2020-08-24.
- How severe is CVE-2020-24612?
- Medium severity. CVSS v3 base score is 6.7 out of 10.