__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Opera Web Browser Object Typecasting Vulnerability [PUBLIC ADVISORY: 01.05.07] January 5, 2007 18:00 GMT Number R-100 ______________________________________________________________________________ PROBLEM: Remote exploitation of a typecasting bug in Opera Software ASA's Opera Web browser could allow an attacker to execute arbitrary code on the affected host. PLATFORM: Opera version 9.02 DAMAGE: Exploitation of this vulnerability would allow an attacker to execute arbitrary code on the affected host. SOLUTION: Apply current patches. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. Could allow a remote attacker to execute ASSESSMENT: arbitrary code with the privileges of the local user. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/r-100.shtml ORIGINAL BULLETIN: http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=458 ______________________________________________________________________________ [***** Start PUBLIC ADVISORY: 01.05.07 *****] Opera Software Opera Web Browser createSVGTransformFromMatrix Object Typecasting Vulnerability I. BACKGROUND Opera is a cross-platform web browser. More information is available at http://www.opera.com/ II. DESCRIPTION Remote exploitation of a typecasting bug in Opera Software ASA's Opera Web browser could allow an attacker to execute arbitrary code on the affected host. A flaw exists within Opera's Javascript SVG implementation. When processing a createSVGTransformFromMatrix request Opera does not properly validate the type of object passed to the function. Passing an incorrect object to this function can result in it using a pointer that is user controlled when it attempts to make the virtual function call. III. ANALYSIS Exploitation of this vulnerability would allow an attacker to execute arbitrary code on the affected host. The attacker would first need to construct a website containing the malicious JavaScript and trick the vulnerable user into visiting the site. This would trigger the vulnerability and allow the code to execute with the privileges of the local user. IV. DETECTION iDefense has confirmed the existence of this vulnerability in Opera version 9.02 on both Windows and Linux. Previous versions may also be affected. V. WORKAROUND Disabling JavaScript will prevent the vulnerability from being triggered. VI. VENDOR RESPONSE Opera Software has addressed this vulnerability in version 9.10. More information is available at the following link. http://www.opera.com/support/search/supsearch.dml?index=851 VII. CVE INFORMATION A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not been assigned yet. VIII. DISCLOSURE TIMELINE 11/16/2006 Initial vendor notification 11/17/2006 Initial vendor response 01/05/2007 Coordinated public disclosure IX. CREDIT The discoverer of this vulnerability wishes to remain anonymous. Get paid for vulnerability research http://labs.idefense.com/methodology/vulnerability/vcp.php Free tools, research and upcoming events http://labs.idefense.com/ X. LEGAL NOTICES Copyright © 2006 iDefense, Inc. Permission is granted for the redistribution of this alert electronically. It may not be edited in any way without the express written consent of iDefense. If you wish to reprint the whole or any part of this alert in any other medium other than electronically, please e-mail customer service for permission. Disclaimer: The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information. [***** End PUBLIC ADVISORY: 01.05.07 *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of iDefense 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. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC) R-090: XSS Using Outer Window's Function Object R-091: Tar Security Update R-092: Novell NetWare Client for Windows Vulnerabilities R-093: Security Vulnerabilities in the Java Runtime Environment R-094: Crashes with Evidence of Memory Corruption R-095: Apple QuickTime RTSP buffer overflow R-096: PDF XSS vulnerability announced at CCC R-097: Multiple Vulnerabilities in Cisco Clean Access R-098: OpenOffice.org Security Update R-099: Opera Web Browser Heap Corruption Vulnerability