UBUNTU-CVE-2020-24606

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    UBUNTU-CVE-2020-24606

    Published: 24 Aug 2020Last Modified: 4 Feb 2026
    Upstream:
    CVE-2020-24606

    Summary:

    Details: Squid before 4.13 and 5.x before 5.0.4 allows a trusted peer to perform Denial of Service by consuming all available CPU cycles during handling of a crafted Cache Digest response message. This only occurs when cache_peer is used with the cache digests feature. The problem exists because peerDigestHandleReply() livelocking in peer_digest.cc mishandles EOF.

    References: https://ubuntu.com/security/CVE-2020-24606, https://github.com/squid-cache/squid/security/advisories/GHSA-vvj7-xjgq-g2jg, https://ubuntu.com/security/notices/USN-4477-1, https://ubuntu.com/security/notices/USN-4551-1, https://www.cve.org/CVERecord?id=CVE-2020-24606

    Affected packages

    Package

    Name: squid3

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.5.12-1ubuntu7.15

    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-2020-24606 | CVE-DB