• [ GLSA 202104-02 ] X.Org X Server: Privilege escalation

    From Thomas Deutschmann@21:1/5 to All on Sat May 1 02:10:01 2021
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    Gentoo Linux Security Advisory GLSA 202104-02
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    https://security.gentoo.org/
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    Severity: High
    Title: X.Org X Server: Privilege escalation
    Date: April 30, 2021
    Bugs: #782679
    ID: 202104-02

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    Synopsis
    ========

    A vulnerability in X.Org X Server may allow users to escalate
    privileges.

    Background
    ==========

    The X Window System is a graphical windowing system based on a
    client/server model.

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

    -------------------------------------------------------------------
    Package / Vulnerable / Unaffected
    -------------------------------------------------------------------
    1 x11-base/xorg-server < 1.20.11 >= 1.20.11

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

    It was discovered that X.Org X Server did not sufficiently check the
    length of the XInput extension's ChangeFeedbackControl request.

    Impact
    ======

    An authorized attacker could possibly escalate privileges, or cause a
    Denial of Service condition.

    Workaround
    ==========

    There is no known workaround at this time.

    Resolution
    ==========

    All X.Org X Server users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=x11-base/xorg-server-1.20.11"

    References
    ==========

    [ 1 ] CVE-2021-3472
    https://nvd.nist.gov/vuln/detail/CVE-2021-3472

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

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

    https://security.gentoo.org/glsa/202104-02

    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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