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.
- 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.
- Dave Aitel - [Dailydave] Real Security
- Trend Micro - Chinese Weekend Compromise
- Real Networks - Home Page
- Trend Micro - JS_IFRAME.AD
- Microsoft - Microsoft Knowledge Base Article 240797
- Symantec - RealPlayer Exploit On The Loose
- CoffeeandSecurity - RealPlayer ierpplug.dll ActiveX Control BO Exploit Demo
The discoverer of this issue is currently anonymous.
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