__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN XSS Using Outer Window's Function Object [Mozilla Foundation Security Advisory 2006-76] December 20, 2006 18:00 GMT Number R-090 ______________________________________________________________________________ PROBLEM: moz_bug_r_a4 demonstrated that the Function prototype regression could be exploited to bypass the protections against cross site script (XSS) injection. PLATFORM: Firefox 2.0 DAMAGE: This could be used to steal credentials or sensitive data from arbitrary sites or perform destructive actions on behalf of a logged-in user. SOLUTION: Upgrade to the appropriate version. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. This could be used to steal credentials or ASSESSMENT: sensitive data from arbitrary sites or perform destructive actions on behalf of a logged-in user. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/r-090.shtml ORIGINAL BULLETIN: Mozilla Foundation Security Advisory 2006-76 http://www.mozilla.org/security/announce/2006/mfsa2006-76.html CVE: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CVE-2006-6507 ______________________________________________________________________________ [***** Start Mozilla Foundation Security Advisory 2006-76 *****] Mozilla Foundation Security Advisory 2006-76 Title: XSS using outer window's Function object Impact: High Announced: December 19, 2006 Reporter: moz_bug_r_a4 Products: Firefox 2.0 Fixed in: Firefox 2.0.0.1 Description moz_bug_r_a4 demonstrated that the Function prototype regression described in bug 355161 could be exploited to bypass the protections against cross site script (XSS) injection, which could be used to steal credentials or sensitive data from arbitrary sites or perform destructive actions on behalf of a logged-in user. This vulnerability is a regression introduced in Firefox 2.0, Firefox 1.5 releases are unaffected. Workaround Disable JavaScript until the upgrade is installed. References https://bugzilla.mozilla.org/show_bug.cgi?id=355161 https://bugzilla.mozilla.org/show_bug.cgi?id=359137 CVE-2006-6507 -------------------------------------------------------------------------------- [***** End Mozilla Foundation Security Advisory 2006-76 *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Mozilla 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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