UBUNTU-CVE-2018-14644

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    UBUNTU-CVE-2018-14644

    Published: 9 Nov 2018Last Modified: 4 Feb 2026
    Upstream:
    CVE-2018-14644
    Aliases:
    USN-7203-1

    Summary:

    Details: An issue has been found in PowerDNS Recursor from 4.0.0 up to and including 4.1.4. A remote attacker sending a DNS query for a meta-type like OPT can lead to a zone being wrongly cached as failing DNSSEC validation. It only arises if the parent zone is signed, and all the authoritative servers for that parent zone answer with FORMERR to a query for at least one of the meta-types. As a result, subsequent queries from clients requesting DNSSEC validation will be answered with a ServFail.

    References: https://ubuntu.com/security/CVE-2018-14644, https://doc.powerdns.com/recursor/security-advisories/powerdns-advisory-2018-07.html, https://downloads.powerdns.com/patches/2018-07/, https://www.cve.org/CVERecord?id=CVE-2018-14644, https://ubuntu.com/security/notices/USN-7203-1

    Affected packages

    Package

    Name: pdns-recursor

    Purl: pkg:deb/ubuntu/[email protected]~alpha2-2ubuntu0.1+esm1?arch=source&distro=esm-apps/xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.0.0~alpha2-2ubuntu0.1+esm1

    Affected versions

    3.7.3-1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
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