UBUNTU-CVE-2021-28116

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    UBUNTU-CVE-2021-28116

    Published: 9 Mar 2021Last Modified: 4 Feb 2026
    Upstream:
    CVE-2021-28116
    Aliases:
    USN-5104-1

    Summary:

    Details: Squid through 4.14 and 5.x through 5.0.5, in some configurations, allows information disclosure because of an out-of-bounds read in WCCP protocol data. This can be leveraged as part of a chain for remote code execution as nobody.

    References: https://ubuntu.com/security/CVE-2021-28116, https://www.zerodayinitiative.com/advisories/ZDI-21-157/, http://www.squid-cache.org/Versions/, https://github.com/squid-cache/squid/security/advisories/GHSA-rgf3-9v3p-qp82, https://www.openwall.com/lists/oss-security/2021/10/04/1, https://ubuntu.com/security/notices/USN-5104-1, https://www.cve.org/CVERecord?id=CVE-2021-28116

    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-2021-28116 | CVE-DB