UBUNTU-CVE-2023-4236

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    UBUNTU-CVE-2023-4236

    Published: 20 Sept 2023Last Modified: 22 Apr 2026
    Upstream:
    CVE-2023-4236
    Aliases:
    USN-6390-1

    Summary:

    Details: A flaw in the networking code handling DNS-over-TLS queries may cause `named` to terminate unexpectedly due to an assertion failure. This happens when internal data structures are incorrectly reused under significant DNS-over-TLS query load. This issue affects BIND 9 versions 9.18.0 through 9.18.18 and 9.18.11-S1 through 9.18.18-S1.

    References: https://ubuntu.com/security/CVE-2023-4236, https://kb.isc.org/docs/cve-2023-4236, https://ubuntu.com/security/notices/USN-6390-1, https://www.cve.org/CVERecord?id=CVE-2023-4236

    Affected packages

    Package

    Name: bind9

    Purl: pkg:deb/ubuntu/bind9@1:9.18.12-0ubuntu0.22.04.3?arch=source&distro=jammy

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1:9.18.12-0ubuntu0.22.04.3

    Affected versions

    1:9.16.15-1ubuntu1
    1:9.16.15-1ubuntu2
    1:9.16.15-1ubuntu3

    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-2023-4236 | CVE-DB