• [ GLSA 202105-19 ] Firejail: Privilege escalation

    From Thomas Deutschmann@21:1/5 to All on Wed May 26 11:10:02 2021
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    Gentoo Linux Security Advisory GLSA 202105-19
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    https://security.gentoo.org/
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    Severity: High
    Title: Firejail: Privilege escalation
    Date: May 26, 2021
    Bugs: #769542
    ID: 202105-19

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    Synopsis
    ========

    A vulnerability was discovered in Firejail which may allow local
    attackers to gain root privileges.

    Background
    ==========

    A SUID program that reduces the risk of security breaches by
    restricting the running environment of untrusted applications using
    Linux namespaces and seccomp-bpf.

    Affected packages
    =================

    -------------------------------------------------------------------
    Package / Vulnerable / Unaffected
    -------------------------------------------------------------------
    1 sys-apps/firejail < 0.9.64.4 >= 0.9.64.4

    Description
    ===========

    It was discovered that a flaw in Firejail's OverlayFS code allowed
    restricted programs to escape sandbox.

    Impact
    ======

    A local attacker could obtain arbitrary file system access via an
    application running within a Firejail sandbox, possibly resulting in
    privilege escalation.

    Workaround
    ==========

    There is no known workaround at this time.

    Resolution
    ==========

    All Firejail users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=sys-apps/firejail-0.9.64.4"

    References
    ==========

    [ 1 ] CVE-2021-26910
    https://nvd.nist.gov/vuln/detail/CVE-2021-26910

    Availability
    ============

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

    https://security.gentoo.org/glsa/202105-19

    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 2021 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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