Vulnerability Note VU#172489

RealNetworks products fail to properly handle chunked data

Original Release date: 05 Apr 2006 | Last revised: 17 May 2006

Overview

Numerous RealNetworks products do not properly handle chunked data. This vulnerability may allow a remote attacker to execute arbitrary code on a vulnerable system.

Description

RealNetworks RealPlayer

RealNetworks RealPlayer is a multimedia application that allows users to view local and remote audio/video content.

Chunked Encoding

Chunked encoding is a means to transfer variable-sized units of data (called chunks) from a web client to a web server.

The Problem

Numerous RealNetworks products fail to properly handle file chunks allowing a buffer overflow to occur. By persuading a user to access a RealPlayer file hosted on a malicious server, a remote attacker may be able to execute arbitrary code.

Considerations

A complete list of affected software is available in the RealNetwork Security Update for March 2006.

Impact

By convincing a user to open RealPlayer file hosted on a malicious server, a remote unauthenticated attacker can execute arbitrary code.

Solution

Patch RealPlayer

Apply the patches supplied in the RealNetwork Security Update for March 2006.

Disable RealPlayer in your web browser


An attacker may be able to exploit this vulnerability by persuading a user to access a RealPlayer file with a web browser. Disabling RealPlayer in the web browser will eliminate this attack vector thereby reducing the chances of exploitation.

To disable RealPlayer in Microsoft Internet Explorer, disable the RealPlayer ActiveX control. In other web browsers, such as Mozilla Firefox, disable the RealPlayer plugin.

Systems Affected (Learn More)

VendorStatusDate NotifiedDate Updated
RealNetworks, Inc.Affected-05 Apr 2006
Red Hat, Inc.Affected-17 May 2006
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A N/A

References

Credit

This vulnerability was reported by iDEFENSE Labs.

This document was written by Jeff Gennari.

Other Information

  • CVE IDs: CVE-2005-2922
  • Date Public: 23 Mar 2006
  • Date First Published: 05 Apr 2006
  • Date Last Updated: 17 May 2006
  • Severity Metric: 20.20
  • Document Revision: 32

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