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The U.S. Department of Energy
Computer Incident Advisory Capability
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INFORMATION BULLETIN
OpenCA Vulnerability
[US-CERT Vulnerability Note VU#264385]
February 25, 2008 21:00 GMT Number S-198
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PROBLEM: OpenCA contains a cross site request forgery (XSRF)
vulenrability that may allow an attacker to leverage an
administrator's creditials to execute activities on the
Certification Authority.
PLATFORM: OpenCA 0.9.2.5, possibly 0.9.2.x
DAMAGE: May allow an attacker to leverage an administrator's
credentials to execute activities on the Certification
Authority.
SOLUTION: Upgrade to the appropriate verion.
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VULNERABILITY The risk is MEDIUM. An authenticated user can be manipulated
ASSESSMENT: into executing activities on the CA - such as digital
certificate issuance - without knowledge or consent.
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LINKS:
CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/s-198.shtml
ORIGINAL BULLETIN: http://www.kb.cert.org/vuls/id/264385
CVE: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=
CVE-2008-0556
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[***** Start US-CERT Vulnerability Note VU#264385 *****]
Vulnerability Note VU#264385
OpenCA allows Cross site request forgery (XSRF)
Overview
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.
I. Description
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.
II. Impact
An authenticated user can be manipulated into executing activities on the CA -
such as digital certificate issuance - without knowledge or consent.
III. Solution
This vulnerability has been addressed in Security Advisory AKLINK-SA-2008-001.
Systems Affected
Vendor Status Date Updated
Open CA Vulnerable 15-Feb-2008
References
https://www.cynops.de/advisories/CVE-2008-0556.txt
http://secunia.com/advisories/28951/
http://www.owasp.org/index.php/XSRF
Credit
This vulnerability was reported by Alexander Klink of Cynops GmbH.
This document was written by Joseph W. Pruszynski.
Other Information
Date Public 02/13/2008
Date First Published 02/22/2008 04:41:00 PM
Date Last Updated 02/25/2008
CERT Advisory
CVE Name CVE-2008-0556
US-CERT Technical Alerts
Metric 2.39
Document Revision 15
[***** End US-CERT Vulnerability Note VU#264385 *****]
_______________________________________________________________________________
CIAC wishes to acknowledge the contributions of US-CERT for the
information contained in this bulletin.
_______________________________________________________________________________
CIAC, the Computer Incident Advisory Capability, is the computer
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