UBUNTU-CVE-2024-23638

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    UBUNTU-CVE-2024-23638

    Published: 24 Jan 2024Last Modified: 4 Feb 2026
    Upstream:
    CVE-2024-23638
    Aliases:
    USN-6728-1

    Summary:

    Details: Squid is a caching proxy for the Web. Due to an expired pointer reference bug, Squid prior to version 6.6 is vulnerable to a Denial of Service attack against Cache Manager error responses. This problem allows a trusted client to perform Denial of Service when generating error pages for Client Manager reports. Squid older than 5.0.5 have not been tested and should be assumed to be vulnerable. All Squid-5.x up to and including 5.9 are vulnerable. All Squid-6.x up to and including 6.5 are vulnerable. This bug is fixed by Squid version 6.6. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives. As a workaround, prevent access to Cache Manager using Squid's main access control: `http_access deny manager`.

    References: https://ubuntu.com/security/CVE-2024-23638, https://github.com/squid-cache/squid/security/advisories/GHSA-j49p-553x-48rx, https://megamansec.github.io/Squid-Security-Audit/stream-assert.html, https://ubuntu.com/security/notices/USN-6728-1, https://www.cve.org/CVERecord?id=CVE-2024-23638

    Affected packages

    Package

    Name: squid3

    Purl: pkg:deb/ubuntu/[email protected]+esm6?arch=source&distro=esm-infra/xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    3.3.8-1ubuntu16
    3.3.8-1ubuntu17

    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-2024-23638 | CVE-DB