• [ GLSA 202105-16 ] X.Org X11 library: Denial of service

    From Thomas Deutschmann@21:1/5 to All on Wed May 26 11:00:02 2021
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    Gentoo Linux Security Advisory GLSA 202105-16
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    https://security.gentoo.org/
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    Severity: Low
    Title: X.Org X11 library: Denial of service
    Date: May 26, 2021
    Bugs: #790824
    ID: 202105-16

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    Synopsis
    ========

    A vulnerability in X.Org X11 library could lead to a Denial of Service condition.

    Background
    ==========

    X.Org is an implementation of the X Window System. The X.Org X11
    library provides the X11 protocol library files.

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

    -------------------------------------------------------------------
    Package / Vulnerable / Unaffected
    -------------------------------------------------------------------
    1 x11-libs/libX11 < 1.7.1 >= 1.7.1

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

    It was discovered that XLookupColor() and other X.Org X11 library
    functions lacked proper validation of the length of their string
    parameters.

    Impact
    ======

    An attacker could emit arbitrary X protocol requests to the X server
    through malicious crafted string parameters in applications linked
    against X.Org X11 library.

    Workaround
    ==========

    There is no known workaround at this time.

    Resolution
    ==========

    All X.Org X11 library users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=x11-libs/libX11-1.7.1"

    References
    ==========

    [ 1 ] CVE-2021-31535
    https://nvd.nist.gov/vuln/detail/CVE-2021-31535

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

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

    https://security.gentoo.org/glsa/202105-16

    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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