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RealNetworks products fail to properly handle chunked data

Description

### 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](<http://www.real.com/>) 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](<http://service.real.com/realplayer/security/03162006_player/en/>) 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](<http://service.real.com/realplayer/security/03162006_player/en/>) 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. --- ### Vendor Information 172489 Filter by status: All Affected Not Affected Unknown Filter by content: __ Additional information available __ Sort by: Status Alphabetical Expand all **Javascript is disabled. Click here to view vendors.** ### 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/>. If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:cert@cert.org?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> ### 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> * <http://securitytracker.com/id?1015808> * <http://www.service.real.com/realplayer/security/03162006_player/en/> * <http://secunia.com/advisories/19358/> * <http://secunia.com/advisories/19365/> ### Acknowledgements This vulnerability was reported by iDEFENSE Labs. This document was written by Jeff Gennari. ### Other Information **CVE IDs:** | [CVE-2005-2922](<http://web.nvd.nist.gov/vuln/detail/CVE-2005-2922>) ---|--- **Severity Metric:** | 20.20 **Date Public:** | 2006-03-23 **Date First Published:** | 2006-04-05 **Date Last Updated: ** | 2006-05-17 12:45 UTC **Document Revision: ** | 33


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