GLSA 202208-11: Yubico pam-u2f: Local PIN Bypass vulnerability

http://security.gentoo.org/

Severity:	low
Title:	Yubico pam-u2f: Local PIN Bypass vulnerability
Date:	08/10/2022
Bugs:	#792270
ID:	202208-11

Synopsis

A vulnerability has been discovered in pam-u2f which could allow a local attacker to bypass PIN entry.

Background

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

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
sys-auth/pam_u2f	< 1.1.1	>= 1.1.1	All supported architectures

Description

A logic issue in Yubico pam-u2f could result in the bypass of a PIN entry requirement when authenticating with FIDO2.

Impact

An attacker with local access to certain applications using pam-u2f for authentication could incorrectly successfully authenticate without entering the authentication PIN.

Workaround

There is no known workaround at this time.

Resolution

All Yubico pam-u2f users should upgrade to the latest version:

          # emerge --sync
          # emerge --ask --oneshot --verbose ">=sys-auth/pam_u2f-1.1.1"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-202208-11.xml

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.