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    Gentoo: GLSA-202012-19: PowerDNS Recursor: Denial of service

    Date 23 Dec 2020
    417
    Posted By LinuxSecurity Advisories
    A vulnerability in PowerDNS Recursor could lead to a Denial of Service condition.
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    Gentoo Linux Security Advisory                           GLSA 202012-19
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                                                https://security.gentoo.org/
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      Severity: Low
         Title: PowerDNS Recursor: Denial of service
          Date: December 23, 2020
          Bugs: #746923
            ID: 202012-19
    
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    Synopsis
    ========
    
    A vulnerability in PowerDNS Recursor could lead to a Denial of Service
    condition.
    
    Background
    ==========
    
    PowerDNS Recursor is a high-end, high-performance resolving name
    server.
    
    Affected packages
    =================
    
         -------------------------------------------------------------------
          Package              /     Vulnerable     /            Unaffected
         -------------------------------------------------------------------
       1  net-dns/pdns-recursor        < 4.3.5                    >= 4.3.5
    
    Description
    ===========
    
    It was discovered that it was possible to update the DNSSEC validation
    state to a bogus state for a cached record via DNS ANY query.
    
    Impact
    ======
    
    A remote attacker could send specially crafted DNS queries to deny
    DNSSEC validation.
    
    Workaround
    ==========
    
    There is no known workaround at this time.
    
    Resolution
    ==========
    
    All PowerDNS Recursor users should upgrade to the latest version:
    
       # emerge --sync
       # emerge --ask --oneshot --verbose ">=net-dns/pdns-recursor-4.3.5"
    
    References
    ==========
    
    [ 1 ] CVE-2020-25829
           https://nvd.nist.gov/vuln/detail/CVE-2020-25829
    [ 2 ] PowerDNS Security Advisory 2020-07
     
    https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2020-07.html
    
    Availability
    ============
    
    This GLSA and any updates to it are available for viewing at
    the Gentoo Security Website:
    
      https://security.gentoo.org/glsa/202012-19
    
    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
    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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