RealNetworks products fail to properly handle chunked data

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.

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Impact

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

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Solution

Patch RealPlayer

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

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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.

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Vendor Information

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RealNetworks, Inc. __ Affected

Updated: April 05, 2006

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

See <http://service.real.com/realplayer/security/03162006_player/en/&gt;.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23172489 Feedback>).

Red Hat, Inc. __ Affected

Updated: May 17, 2006

Status

Affected

Vendor Statement

This issue affected HelixPlayer in Red Hat Enterprise Linux 4, and RealPlayer in Red Hat Enterprise Linux Extras 3 and 4. Updated packages are available along with our advisories at the URL below and by using the Red Hat Network ‘up2date’ tool.

<https://rhn.redhat.com/cve/CVE-2005-2922.html&gt;

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://www.idefense.com/intelligence/vulnerabilities/display.php?id=404&gt;
• <http://securitytracker.com/id?1015808&gt;
• <http://www.service.real.com/realplayer/security/03162006_player/en/&gt;
• <http://secunia.com/advisories/19358/&gt;
• <http://secunia.com/advisories/19365/&gt;

Acknowledgements

This vulnerability was reported by iDEFENSE Labs.

This document was written by Jeff Gennari.

Other Information

CVE IDs:	CVE-2005-2922
Severity Metric:	20.20 Date Public: