UBUNTU-CVE-2020-11653

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    UBUNTU-CVE-2020-11653

    Published: 8 Apr 2020Last Modified: 22 Apr 2026
    Upstream:
    CVE-2020-11653

    Summary:

    Details: An issue was discovered in Varnish Cache before 6.0.6 LTS, 6.1.x and 6.2.x before 6.2.3, and 6.3.x before 6.3.2. It occurs when communication with a TLS termination proxy uses PROXY version 2. There can be an assertion failure and daemon restart, which causes a performance loss.

    References: https://ubuntu.com/security/CVE-2020-11653, https://varnish-cache.org/security/VSV00005.html#vsv00005, https://github.com/varnishcache/varnish-cache/commit/2d8fc1a784a1e26d78c30174923a2b14ee2ebf62, https://ubuntu.com/security/notices/USN-5474-1, https://www.cve.org/CVERecord?id=CVE-2020-11653, https://ubuntu.com/security/notices/USN-5474-2

    Affected packages

    Package

    Name: varnish

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=focal

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -6.2.1-2ubuntu0.1

    Affected versions

    6.1.1-1

    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-2020-11653 | CVE-DB