iDefense Security Advisory 02.01.10 http://labs.idefense.com/intelligence/vulnerabilities/ Feb 01, 2010 I. BACKGROUND RealPlayer is an application for playing various media formats, developed by RealNetworks Inc. Since late 2003, Real Player has been based on the open-source Helix Player. More information can be found at the URLs shown. For more information, see the vendor's site found at the following links. http://www.real.com/realplayer.html http://helixcommunity.org/ II. DESCRIPTION Remote exploitation of an integer overflow vulnerability in RealNetworks Inc.'s Real Player could allow an attacker to execute arbitrary code with the privileges of the current user. This problem specifically exists in the CMediumBlockAllocator::Alloc method. When calculating the size of a memory allocation, an integer overflow occurs. This leads to heap corruption, which can result in the execution of arbitrary code. III. ANALYSIS Exploitation of this vulnerability results in the execution of arbitrary code with the privileges of the user executing Real Player. To be successful, an attacker must persuade a user to use Real Player to view specially crafted media. This could be accomplished via a Web page or direct link to the malicious media. IV. DETECTION iDefense has confirmed the existence of this vulnerability in Real Player versions 10.5 (build 6.0.12.883) and 11 (build 6.0.14.738) on Windows. Other versions may also be affected. RealNetworks has provided the following matrix of vulnerable products: Windows RealPlayer 11.0.0 - 11.0.4 Windows RealPlayer 10.5 (6.0.12.1040-6.0.12.1663, 6.0.12.1698, 6.0.12.1741) Mac RealPlayer 10 Linux RP10 V. WORKAROUND iDefense is currently unaware of any effective workaround for this issue. VI. VENDOR RESPONSE RealNetworks has released a patch which addresses this issue. Information about downloadable vendor updates can be found by clicking on the URLs shown. http://service.real.com/realplayer/security/01192010_player/en/ VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2009-4248 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org/), which standardizes names for security problems. VIII. DISCLOSURE TIMELINE 01/11/2008 Initial Contact 01/11/2009 Initial Response 02/01/2010 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 © 2010 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 customerservice@xxxxxxxxxxxx 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.
