What’s Vulnerable › Vulnerabilities

CVE-2009-2936

• Severity: high (CVSS 7.5 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 63.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2010-04-05 · updated 2026-06-16
• Weakness: CWE-287

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.

Affected products

• Varnish.Projects.Linpro Varnish: 0.9, 0.9.1, 1.0, 1.0.1, 1.0.2, 1.0.3 (+14)

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
• 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

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