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    Gentoo: GLSA-202012-11: c-ares: Denial of service

    Date 23 Dec 2020
    212
    Posted By LinuxSecurity Advisories
    A Denial of Service vulnerability was discovered in c-ares.
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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
    This email address is being protected from spambots. You need JavaScript enabled to view it. 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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