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  • [ GLSA 202012-19 ] PowerDNS Recursor: Denial of service

    From Thomas Deutschmann@21:1/5 to All on Wed Dec 23 21:40:02 2020
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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 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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