UBUNTU-CVE-2022-40188

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    UBUNTU-CVE-2022-40188

    Published: 23 Sept 2022Last Modified: 22 Apr 2026
    Upstream:
    CVE-2022-40188
    Aliases:
    USN-6225-1

    Summary:

    Details: Knot Resolver before 5.5.3 allows remote attackers to cause a denial of service (CPU consumption) because of algorithmic complexity. During an attack, an authoritative server must return large NS sets or address sets.

    References: https://ubuntu.com/security/CVE-2022-40188, https://github.com/CZ-NIC/knot-resolver/commit/f6577a20e493c7fbdac124d7544bf1846b084185, https://www.knot-resolver.cz/2022-09-21-knot-resolver-5.5.3.html, https://gitlab.nic.cz/knot/knot-resolver/-/merge_requests/1343#note_262558, https://ubuntu.com/security/notices/USN-6225-1, https://www.cve.org/CVERecord?id=CVE-2022-40188

    Affected packages

    Package

    Name: knot-resolver

    Purl: pkg:deb/ubuntu/[email protected]~beta3-1ubuntu0.1~esm1?arch=source&distro=esm-apps/xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.0.0~beta3-1ubuntu0.1~esm1

    Affected versions

    1.0.0~beta2-123-g6134920-1
    1.0.0~beta3-1

    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
    UBUNTU-CVE-2022-40188 | CVE-DB