Home / mailingsPDF  

[gentoo-announce] [ GLSA 202208-11 ] Yubico pam-u2f: Local PIN Bypass vulnerability

Posted on 10 August 2022
Gentoo-announce

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory GLSA 202208-11
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
https://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Severity: Low
Title: Yubico pam-u2f: Local PIN Bypass vulnerability
Date: August 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
-------------------------------------------------------------------
1 sys-auth/pam_u2f < 1.1.1 >= 1.1.1

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
==========
[ 1 ] CVE-2021-31924
https://nvd.nist.gov/vuln/detail/CVE-2021-31924
[ 2 ] YSA-2021-03

Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

https://security.gentoo.org/glsa/202208-11

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.

License
=======
Copyright 2022 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/2.5
--===============5979021923917597478==Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="signature.asc"

 

TOP