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Gentoo: GLSA-202309-05 Medium: Yubico pam-u2f Remote Access Vulnerability

A vulnerability has been discovered in pam-u2f which could allow a local attacker to bypass PIN entry.. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 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 This email address is being protected from spambots. You need JavaScript enabled to view it. 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/ . Investigate a minor vulnerability in pam-u2f on Gentoo Linux, which permits local users to bypass the PIN requirement, thereby jeopardizing the security of the authentication process.. Gentoo Security Advisory,PAM Module,Yubico PIN Bypass. . Severity: Low. LinuxSecurity.com Team

Aug 10, 2022 •Low Gentoo