RealPlayer ierpplug.dll ActiveX Control Import Playlist Name Stack Buffer Overflow Vulnerability



Date Discovered

October 18, 2007


RealPlayer is prone to a stack-based buffer-overflow vulnerability because it fails to perform adequate boundary checks of user-supplied input before copying it to an insufficiently sized memory buffer. Attackers can exploit this issue to execute arbitrary code in the context of the application using the affected control (typically Internet Explorer). Successful attacks can compromise the application and possibly the underlying computer. Failed attacks will likely cause denial-of-service conditions.

Technologies Affected

  • Real Networks RealPlayer 10.0.0
  • Real Networks RealPlayer 10.5.0
  • Real Networks RealPlayer 11 Beta


Set web browser security to disable the execution of script code or active content.
Disabling support for client-side scripting and active content may limit exposure to these issues. This is especially prudent for untrusted sites in the Internet Zone.

Do not use client software to access unknown or untrusted hosts from critical systems.
To reduce the likelihood of successful exploits, never visit sites of questionable integrity or follow links provided by unfamiliar or untrusted sources.

Do not accept communications that originate from unknown or untrusted sources.
Do not open or view email from unknown or untrusted sources. Configuring email clients to view messages as plain text will also mitigate this issue.

Implement multiple redundant layers of security.
Various memory-protection schemes (such as nonexecutable and randomly mapped memory segments) may hinder an attacker's ability to exploit this vulnerability to execute arbitrary code.

Run all software as a nonprivileged user with minimal access rights.
Perform all nonadministrative tasks, such as browsing the web, as an unprivileged user with minimal access rights.

The vendor released updates to address this issue. Please see the references for more information.



The discoverer of this issue is currently anonymous.

© 1995- Symantec Corporation

Permission to redistribute this alert electronically is granted as long as it is not edited in any way unless authorized by Symantec Security Response. Reprinting the whole or part of this alert in any medium other than electronically requires permission from


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.

Symantec, Symantec products, Symantec Security Response, and are registered trademarks of Symantec Corp. and/or affiliated companies in the United States and other countries. All other registered and unregistered trademarks represented in this document are the sole property of their respective companies/owners.