__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN OpenCA Vulnerability [US-CERT Vulnerability Note VU#264385] February 25, 2008 21:00 GMT Number S-198 ______________________________________________________________________________ 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. ______________________________________________________________________________ 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. ______________________________________________________________________________ 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 ______________________________________________________________________________ [***** 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 security incident response team for the U.S. Department of Energy (DOE) and the emergency backup response team for the National Institutes of Health (NIH). CIAC is located at the Lawrence Livermore National Laboratory in Livermore, California. CIAC is also a founding member of FIRST, the Forum of Incident Response and Security Teams, a global organization established to foster cooperation and coordination among computer security teams worldwide. CIAC services are available to DOE, DOE contractors, and the NIH. CIAC can be contacted at: Voice: +1 925-422-8193 (7x24) FAX: +1 925-423-8002 STU-III: +1 925-423-2604 E-mail: ciac@ciac.org Previous CIAC notices, anti-virus software, and other information are available from the CIAC Computer Security Archive. World Wide Web: http://www.ciac.org/ Anonymous FTP: ftp.ciac.org PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing communities receive CIAC bulletins. If you are not part of these communities, please contact your agency's response team to report incidents. Your agency's team will coordinate with CIAC. The Forum of Incident Response and Security Teams (FIRST) is a world-wide organization. A list of FIRST member organizations and their constituencies can be obtained via WWW at http://www.first.org/. This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. 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