Vulnerability Note VU#264385

OpenCA allows Cross site request forgery (XSRF)

Original Release date: 22 Feb 2008 | Last revised: 25 Feb 2008


OpenCA contains a cross site request forgery (XSRF) vulnerability that may allow an attacker to leverage an administrator's creditials to exectue activities on the Certification Authority.


The OpenCA PKI Development Project is an open source out-of-the-box Certification Authority (CA). OpenCA includes various web forms for executing requests and other activities on the CA such as digital certificate issuance. A cross site request forgery (XSRF) vulnerability exists in the way OpenCA processes requests executed via various forms. By manipulating an administrator who is authenticated to the CA via a session cookie to follow a tag that contains CA commands, an attacker may be able to successfully execute the commands on the CA.


An authenticated user can be manipulated into executing activities on the CA - such as digital certificate issuance - without knowledge or consent.


This vulnerability has been addressed in Security Advisory AKLINK-SA-2008-001.

Systems Affected (Learn More)

VendorStatusDate NotifiedDate Updated
Open CAAffected-15 Feb 2008
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A N/A



This vulnerability was reported by Alexander Klink of Cynops GmbH.

This document was written by Joseph W. Pruszynski.

Other Information

  • CVE IDs: CVE-2008-0556
  • Date Public: 13 Feb 2008
  • Date First Published: 22 Feb 2008
  • Date Last Updated: 25 Feb 2008
  • Severity Metric: 2.39
  • Document Revision: 15


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