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    CVE-2018-1000027

    The Squid Software Foundation Squid HTTP Caching Proxy version prior to version 4.0.23 contains a NULL Pointer Dereference vulnerability in HTTP Response X-Forwarded-For header processing that can result in Denial of Service to all clients of the proxy. This attack appear to be exploitable via Remote HTTP server responding with an X-Forwarded-For header to certain types of HTTP request. This vulnerability appears to have been fixed in 4.0.23 and later.

    Published:Jan 19, 2018
    Last Modified:Nov 21, 2024
    EPS:Feb 9, 2018
    EPSS Score:0.37523
    CVSS Score:7.5

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Squid-cache
    Product
    Squid

    Exploits

    No exploit reference

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    References

    http://www.squid-cache.org/Advisories/SQUID-2018_2.txt
    http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2018_2.patch
    http://www.squid-cache.org/Versions/v4/changesets/SQUID-2018_2.patch
    https://github.com/squid-cache/squid/pull/129/files
    https://lists.debian.org/debian-lts-announce/2018/02/msg00001.html
    https://lists.debian.org/debian-lts-announce/2018/02/msg00002.html
    https://usn.ubuntu.com/3557-1/
    https://usn.ubuntu.com/4059-2/
    https://www.debian.org/security/2018/dsa-4122
    http://www.squid-cache.org/Advisories/SQUID-2018_2.txt
    http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2018_2.patch
    http://www.squid-cache.org/Versions/v4/changesets/SQUID-2018_2.patch
    https://github.com/squid-cache/squid/pull/129/files
    https://lists.debian.org/debian-lts-announce/2018/02/msg00001.html
    https://lists.debian.org/debian-lts-announce/2018/02/msg00002.html
    https://usn.ubuntu.com/3557-1/
    https://usn.ubuntu.com/4059-2/
    https://www.debian.org/security/2018/dsa-4122

    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