__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN RealPlayer Vulnerability [RealNetworks, Inc. October 26, 2004 Update] October 27, 2004 18:00 GMT Number P-023 ______________________________________________________________________________ PROBLEM: A vulnerability was discovered in RealNetworks Real Player for Windows platform. The vulnerability involves using a third-party skin file. Skins are colorful, customized and interchangeable sets of graphics, which allow users to continually change the look of an application such as RealPlayer. PLATFORM: Windows: RealPlayer 10.5 (6.0.12.1056), 10.5 (6.0.12.1053), 10.5 (6.0.12.1040), 10.5 Beta (6.0.12.1016), RealPlayer 10, RealOne Player v2, RealOne Player v1 (RealPlayer for Mac, Linux and handheld devices are not affected) DAMAGE: A buffer overrun may occur in a third-party compression library, DUNZIP32.DLL. Skin files from RealNetworks' site are carefully examined before posting for viruses and exploits. To exploit this vulnerability, a user must download a skin file from a malicious website. SOLUTION: Install the available security update. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. If a remote intruder can coerce a user to ASSESSMENT: install a malicious skin file he can execute arbitrary code as the user. Skin files obtained directly from RealNetworks have been checked for malicious code. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/p-023.shtml ORIGINAL BULLETIN: http://www.service.real.com/help/faq/security/041026_player/EN/ ______________________________________________________________________________ [***** Start RealNetworks, Inc. October 26, 2004 Update *****] RealNetworks, Inc. Releases Update to Address Security Vulnerabilities. Updated October 26, 2004 RealNetworks, Inc. has addressed a recently discovered security vulnerability that offered the potential for an attacker to run arbitrary or malicious code on a customer's machine. RealNetworks has received no reports of machines compromised as a result of the now-remedied vulnerability. RealNetworks takes all security vulnerabilities very seriously. The specific exploit was: * To fashion a malicious skin file to cause a buffer overflow which could have allowed an attacker to execute arbitrary code on a customer's machine. The buffer overrun was designed to occur in a 3rd-party compression library, DUNZIP32.DLL. Skins files from RealNetworks' site are carefully examined before posting for viruses and exploits. Affected Software: Windows Software Affected? Language Update Available? RealPlayer 10.5 (6.0.12.1056) No All Supported Not required RealPlayer 10.5 (6.0.12.1053) Yes All Supported Yes RealPlayer 10.5 (6.0.12.1040) Yes English Yes RealPlayer 10.5 Beta (6.0.12.1016) Yes English Requires upgrade RealPlayer 10 Yes All Supported Yes RealOne Player v2 Yes All Supported Yes RealOne Player v1 Yes English Requires upgrade RealPlayer 8 No All Supported Not required RealPlayer Enterprise No English Not required Note: To see your Player version number (6.0.12.xxxx), select Help > About in the Player menus. Mac Software Affected? Language Update Available? Mac RealPlayer 10 No All Supported Not required Mac RealPlayer 10 Beta No English Not required Mac RealOne Player No English Not required Linux Software Affected? Language Update Available? Linux RealPlayer 10 No English Not required Helix Player No English Not required Handheld Devices Software Affected? Language Update Available? Nokia Series60 Handsets No English Not Required Helix Player for Symbian No English Not Required RealPlayer for Palm No English Not Required RealOne Player for Palm No English Not Required Workaround: To ensure that your Player is protected, we recommend installing the available updates. UPDATES Windows Players: RealOne Player (English only) and RealPlayer 10.5 Beta (English only) require a full download to correct this issue. Please click here or use the following steps to upgrade your Player: 1. In the Tools menu select Check for Update. 2. Select the box next to the "RealPlayer 10.5 with Harmony™ Technology" component. 3. Click Install to download and install the update. RealOne Player v2, RealPlayer 10, and RealPlayer 10.5 (Final Release) customers please click here or use the following steps to update your Player: 1. In the Tools menu select Check for Update. 2. Select the box next to the "Security Update - Skin File Overflow" component. 3. Click Install to download and install the update. German English Spanish French Italian Portuguese Japanese Korean Simplified Chinese Traditional Chinese Acknowledgements: RealNetworks would like to acknowledge eEye Digital Security and John Heasman for bringing this exploit to our attention as well those who subsequently worked with RealNetworks to correct the vulnerability. Warranty: RealNetworks Inc. endeavors to provide you with the highest quality products and services, but cannot guarantee, and does not warrant, that the operation of any RealNetworks product will be error-free, uninterrupted or secure. Please see your original license agreement for details of our limited warranty or warranty disclaimer. [***** End RealNetworks, Inc. October 26, 2004 Update *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of RealNetworks, Inc. 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. 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