UBUNTU-CVE-2016-4556

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    UBUNTU-CVE-2016-4556

    Published: 10 May 2016Last Modified: 4 Feb 2026
    Upstream:
    CVE-2016-4556
    Aliases:
    USN-2995-1

    Summary:

    Details: Double free vulnerability in Esi.cc in Squid 3.x before 3.5.18 and 4.x before 4.0.10 allows remote servers to cause a denial of service (crash) via a crafted Edge Side Includes (ESI) response.

    References: https://ubuntu.com/security/CVE-2016-4556, http://www.squid-cache.org/Advisories/SQUID-2016_9.txt, https://ubuntu.com/security/notices/USN-2995-1, https://www.cve.org/CVERecord?id=CVE-2016-4556

    Affected packages

    Package

    Name: squid3

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.3.8-1ubuntu6.8

    Affected versions

    3.3.8-1ubuntu3
    3.3.8-1ubuntu4
    3.3.8-1ubuntu5
    3.3.8-1ubuntu6
    3.3.8-1ubuntu6.1
    3.3.8-1ubuntu6.2
    3.3.8-1ubuntu6.3
    3.3.8-1ubuntu6.4
    3.3.8-1ubuntu6.6

    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-2016-4556 | CVE-DB