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Gentoo: GLSA-202501-04 High: Yubico pam-u2f Partial Auth Bypass

gentoo
Calendar Grey January 23, 2025
Dist Gentoo Esm H88
The Yubico pam-u2f module for Gentoo Linux presents a critical vulnerability that might enable a partial bypass of authentication measures. Users are advised to perform an upgrade immediately.
A vulnerability has been discovered in Yubico pam-u2f, which can lead to a partial authentication bypass.

Summary

Multiple vulnerabilities have been discovered in Yubico pam-u2f. Please review the CVE identifiers referenced below for details.

Topics%20covered

Topics Covered

security advisory Gentoo high severity pam-u2f Yubico partial authentication

Resolution

All Yubico pam-u2f users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=sys-auth/pam_u2f-1.3.2"

References

[ 1 ] CVE-2025-23013 https://nvd.nist.gov/vuln/detail/CVE-2025-23013 [ 2 ] YSA-2025-01 https://www.yubico.com/support/security-advisories/YSA-2025-01

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
https://security.gentoo.org/glsa/202501-04
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Concerns

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.

Severity: High
Title: Yubico pam-u2f: Partial Authentication Bypass
Date: January 23, 2025
Bugs: #948201
ID: 202501-04

Topics%20covered

Topics Covered

security advisory Gentoo high severity pam-u2f Yubico partial authentication

Synopsis

A vulnerability has been discovered in Yubico pam-u2f, which can lead to a partial authentication bypass.

Background

Yubico pam-u2f is a PAM module for FIDO2 and U2F keys.

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Affected Packages

Package Vulnerable Unaffected ---------------- ------------ ------------ sys-auth/pam_u2f < 1.3.2 >= 1.3.2

Impact

Depending on specific settings and usage scenarios the result of the pam-u2f module may be altered or ignored.

Workaround

There is no known workaround at this time.

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