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  • [ GLSA 202012-11 ] c-ares: Denial of service

    From Thomas Deutschmann@21:1/5 to All on Wed Dec 23 21:20:02 2020
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    Gentoo Linux Security Advisory GLSA 202012-11
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    https://security.gentoo.org/
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    Severity: Low
    Title: c-ares: Denial of service
    Date: December 23, 2020
    Bugs: #754939
    ID: 202012-11

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    Synopsis
    ========

    A Denial of Service vulnerability was discovered in c-ares.

    Background
    ==========

    c-ares is an asynchronous resolver library.

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

    -------------------------------------------------------------------
    Package / Vulnerable / Unaffected
    -------------------------------------------------------------------
    1 net-dns/c-ares < 1.17.1 >= 1.17.1

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

    It was discovered that c-ares incorrectly handled certain DNS requests.

    Impact
    ======

    A remote attacker, able to trigger a DNS request for a host of their
    choice by an application linked against c-ares, could possibly cause a
    Denial of Service condition.

    Workaround
    ==========

    There is no known workaround at this time.

    Resolution
    ==========

    All c-ares users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-dns/c-ares-1.17.1"

    References
    ==========

    [ 1 ] CVE-2020-8277
    https://nvd.nist.gov/vuln/detail/CVE-2020-8277

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

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

    https://security.gentoo.org/glsa/202012-11

    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 2020 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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