Vulnerability Note VU#461187

RealPlayer file deletion overflow vulnerability

Overview

RealPlayer contains a buffer overflow vulnerability that may allow an attacker to execute code on a vulnerable system.

I. Description

RealPlayer media player that is distributed by RealNetworks. RealPlayer supports streaming and local media.

Per the Zero Day Initiative advisory ZDI-08-046:

The specific flaw exists in RealPlayer's rjbdll.dll module when handling the deletion of media library files. An attacker could exploit this vulnerability using an ActiveX control {FDC7A535-4070-4B92-A0EA-D9994BCC0DC5} to import a vulnerable file into the user's media library. Upon deletion of this file, an exploitable stack based buffer overflow can be triggered.

II. Impact

By convincing a user to visit a website, a remote attacker may be able to execute arbitrary code.

III. Solution

Upgrade

RealPlayer updates for multiple operating systems are available on the RealNetworks support site. Users are encouraged to apply updates as soon as possible.

Disable Active X control

Setting the kill bit for the {FDC7A535-4070-4B92-A0EA-D9994BCC0DC5} CLSID may prevent this vulnerability from being exploited by a remote attacker. See US-Cert Vulnerability Note VU#871673 for more information on how to disable this control.

Systems Affected

Vendor	Status	Date Updated
RealNetworks, Inc.	Vulnerable	28-Jul-2008

References

http://www.zerodayinitiative.com/advisories/ZDI-08-046/
http://service.real.com/realplayer/security/07252008_player/en/
http://www.kb.cert.org/vuls/id/871673

Credit

Thanks to ZDI for information that was used in this report.

This document was written by Ryan Giobbi.

Other Information

Date Public	07/25/2008
Date First Published	07/28/2008 03:50:09 PM
Date Last Updated	07/28/2008
CERT Advisory
CVE-ID(s)
NVD-ID(s)
US-CERT Technical Alerts
Metric	25.31
Document Revision	3