Public Vulnerability Reports

RealNetworks RealPlayer SIPR Heap Buffer Overflow Vulnerability

16.08.11

BACKGROUND

RealPlayer is RealNetworks's media player product used to render video and other media. For more information, visit:

http://www.real.com.

DESCRIPTION

Remote exploitation of a memory corruption vulnerability in RealNetworks, Inc.'s RealPlayer media player could allow attackers to execute arbitrary code in the context of the targeted user.

The vulnerability is due to the way RealPlayer handles specially crafted RealMedia files using the SIPR codec. A value is read directly from the media file at a certain offset and is passed to a memory copy operation as the length parameter. This can cause the memory copy operation to overflow the bounds of a fixed sized heap buffer. This condition may lead to arbitrary code execution.

ANALYSIS

Successful exploitation could allow attackers to execute arbitrary code in the context of the currently logged-on user. To exploit this vulnerability, an attacker must persuade a victim into using RealPlayer to open a specially crafted media file. This could be accomplished by either direct link or referenced from a website under the attacker's control. An attacker could host a Web page containing a malformed file. Upon visiting the malicious Web page, exploitation would occur and execution of arbitrary code would be possible. Alternatively a malicious media file could be attached within an e-mail file.

DETECTION

RealPlayer versions prior to 14.0.6 are vulnerable.

WORKAROUND

iDefense is currently unaware of any workarounds for this issue.

VENDOR RESPONSE

RealNetworks has released fixes which addresses this issue. Information about downloadable vendor updates can be found by clicking on the URLs shown.

http://service.real.com/realplayer/security/08162011_player/en/

CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2011-2945 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org/), which standardizes names for security problems.

DISCLOSURE TIMELINE

03/30/2011 Initial Vendor Notification
03/30/2011 Vendor Reply
08/16/2011 Coordinated Public Disclosure

CREDIT

This vulnerability was reported to iDefense by Omair.

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LEGAL NOTICES

Copyright © 2011 Verisign, 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.