CVE-2019-12525

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    CVE-2019-12525

    Published: 11 Jul 2019Last Modified: 8 Jul 2026

    Summary:

    Details: An issue was discovered in Squid 3.3.9 through 3.5.28 and 4.x through 4.7. When Squid is configured to use Digest authentication, it parses the header Proxy-Authorization. It searches for certain tokens such as domain, uri, and qop. Squid checks if this token's value starts with a quote and ends with one. If so, it performs a memcpy of its length minus 2. Squid never checks whether the value is just a single quote (which would satisfy its requirements), leading to a memcpy of its length minus 1.

    References: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPXN2CLAGN5QSQBTOV5IGVLDOQSRFNTZ/, http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00053.html, http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00056.html, http://www.squid-cache.org/Versions/v4/changesets/, https://lists.debian.org/debian-lts-announce/2019/07/msg00018.html, https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html, https://seclists.org/bugtraq/2019/Aug/42, https://usn.ubuntu.com/4065-1/, https://usn.ubuntu.com/4065-2/, https://www.debian.org/security/2019/dsa-4507, http://www.squid-cache.org/Versions/v4/changesets/squid-4-7f73e9c5d17664b882ed32590e6af310c247f320.patch, https://github.com/squid-cache/squid/commits/v4

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 83f1f03412750fdd98b5219ff5829cd4e319a1b3
    Fixed -None

    Affected versions

    SQUID_4_7

    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