CVE-2020-24612

Name: CVE-2020-24612
Creator: NVD / NIST
Published: 2020-08-24T21:15:15.877+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.7/10EPSS 0.32%

Last modified Jun 17, 2026

CVE-2020-24612 is a medium-severity vulnerability rated 4.7/10 on the CVSS scale. 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. EPSS estimates a 0.32% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

4.7/10

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.32%

23.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Fedoraproject	Selinux-Policy	>= 3.14, <= 2020-08-24

References

https://bugzilla.redhat.com/show_bug.cgi?id=1860888Issue Tracking, Third Party Advisory
https://github.com/fedora-selinux/selinux-policy/commit/71e1989028802c7875d3436fd3966c587fa383fbPatch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1860888Issue Tracking, Third Party Advisory
https://github.com/fedora-selinux/selinux-policy/commit/71e1989028802c7875d3436fd3966c587fa383fbPatch, Third Party Advisory

Timeline

Published: Aug 24, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-24612?

How severe is CVE-2020-24612?

CVE-2020-24612 has a CVSS score of 4.7/10 (MEDIUM severity). The EPSS model estimates a 0.32% probability of exploitation in the next 30 days.

How do I fix CVE-2020-24612?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-24612?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST