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

    From glsamaker@gentoo.org@21:1/5 to All on Wed Aug 10 06:50:01 2022
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    Gentoo Linux Security Advisory GLSA 202208-11
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    https://security.gentoo.org/
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    Severity: Low
    Title: Yubico pam-u2f: Local PIN Bypass vulnerability
    Date: August 10, 2022
    Bugs: #792270
    ID: 202208-11

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    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
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