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CVE-2009-2936

7.5 · HIGH

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 receiv…

Published Apr 5, 2010varnish.projects.linproCWE-287EPSS 63.82%

Overview

CVE-2009-2936 is a high-severity vulnerability affecting varnish.projects.linpro varnish. It was published on April 5, 2010 and has a CVSS 2.0 base score of 7.5 (HIGH).

This vulnerability has a CVSS 2.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories and patches from varnish.projects.linpro. Update varnish to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Reflists.fedoraproject.org/pipermail/package-announce/2010-April/040359.htmlRefwww.securityfocus.com/archive/1/510360/100/0/threadedRefwww.securityfocus.com/archive/1/510368/100/0/threadedRefwww.varnish-cache.org/changeset/3865Refwww.varnish-cache.org/wiki/CLIReflists.fedoraproject.org/pipermail/package-announce/2010-April/040359.htmlRefwww.securityfocus.com/archive/1/510360/100/0/threadedRefwww.securityfocus.com/archive/1/510368/100/0/threadedRefwww.varnish-cache.org/changeset/3865Refwww.varnish-cache.org/wiki/CLI

How CyberStrike helps

Frequently asked questions

What is CVE-2009-2936?

CVE-2009-2936 is a high-severity vulnerability affecting varnish.projects.linpro varnish. It was published on April 5, 2010 and has a CVSS 2.0 base score of 7.5 (HIGH).

How severe is CVE-2009-2936?

This vulnerability has a CVSS 2.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2009-2936?

Check the references section for vendor advisories and patches from varnish.projects.linpro. Update varnish to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2009-2936?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2009-2936 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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