CVE-2009-2936

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    CVE-2009-2936

    Published: 5 Apr 2010Last Modified: 10 Apr 2026

    Summary:

    Details: The Command Line Interface (aka Server CLI or administration interface) in the master process in the reverse proxy server in Varnish before 2.1.0 does not require authentication for commands received through a TCP port, which allows remote attackers to (1) execute arbitrary code via a vcl.inline directive that provides a VCL configuration file containing inline C code; (2) change the ownership of the master process via param.set, stop, and start directives; (3) read the initial line of an arbitrary file via a vcl.load directive; or (4) conduct cross-site request forgery (CSRF) attacks that leverage a victim's location on a trusted network and improper input validation of directives. NOTE: the vendor disputes this report, saying that it is "fundamentally misguided and pointless.

    References: http://lists.fedoraproject.org/pipermail/package-announce/2010-April/040359.html, http://www.securityfocus.com/archive/1/510360/100/0/threaded, http://www.securityfocus.com/archive/1/510368/100/0/threaded, http://www.varnish-cache.org/changeset/3865, http://www.varnish-cache.org/wiki/CLI

    Affected packages

    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