UBUNTU-CVE-2021-28652

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    UBUNTU-CVE-2021-28652

    Published: 27 May 2021Last Modified: 4 Feb 2026
    Upstream:
    CVE-2021-28652
    Aliases:
    USN-4981-1

    Summary:

    Details: An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to incorrect parser validation, it allows a Denial of Service attack against the Cache Manager API. This allows a trusted client to trigger memory leaks that. over time, lead to a Denial of Service via an unspecified short query string. This attack is limited to clients with Cache Manager API access privilege.

    References: https://ubuntu.com/security/CVE-2021-28652, https://github.com/squid-cache/squid/security/advisories/GHSA-m47m-9hvw-7447, https://ubuntu.com/security/notices/USN-4981-1, https://www.cve.org/CVERecord?id=CVE-2021-28652

    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-2021-28652 | CVE-DB