====================================================================== Secunia Research 15/04/2009 - DivX Web Player Stream Format Chunk Buffer Overflow - ====================================================================== Table of Contents Affected Software....................................................1 Severity.............................................................2 Vendor's Description of Software.....................................3 Description of Vulnerability.........................................4 Solution.............................................................5 Time Table...........................................................6 Credits..............................................................7 References...........................................................8 About Secunia........................................................9 Verification........................................................10 ====================================================================== 1) Affected Software * DivX Web Player version 1.4.2.7 NOTE: Other versions may also be affected. ====================================================================== 2) Severity Rating: Highly critical Impact: System access Where: Remote ====================================================================== 3) Vendor's Description of Software "DivX Web Player lets you play up to HD-quality DivX? video in your web browser. You can also use DivX Web Player to easily embed DivX videos onto your website or blog." Product Link: http://www.divx.com/en/web-player-windows ====================================================================== 4) Description of Vulnerability Secunia Research has discovered a vulnerability in DivX Web Player, which can be exploited by malicious people to compromise a user's system. The vulnerability is caused due to a signedness error in the processing of "STRF" (Stream Format) chunks. This can be exploited to cause a heap-based buffer overflow via a specially crafted DivX file. Successful exploitation may allow execution of arbitrary code by tricking a user into visiting a malicious website. ====================================================================== 5) Solution Update to version 1.4.3.4, included in an updated DivX bundle. ====================================================================== 6) Time Table 17/12/2008 - Vendor notified. 18/12/2008 - Vendor response. 11/03/2009 - DivX Web Player 1.4.3 released in a bundle update. 15/04/2009 - Public disclosure. ====================================================================== 7) Credits Discovered by Alin Rad Pop, Secunia Research. ====================================================================== 8) References The Common Vulnerabilities and Exposures (CVE) project has assigned CVE-2008-5259 for the vulnerability. ====================================================================== 9) About Secunia Secunia offers vulnerability management solutions to corporate customers with verified and reliable vulnerability intelligence relevant to their specific system configuration: http://secunia.com/advisories/business_solutions/ Secunia also provides a publicly accessible and comprehensive advisory database as a service to the security community and private individuals, who are interested in or concerned about IT-security. http://secunia.com/advisories/ Secunia believes that it is important to support the community and to do active vulnerability research in order to aid improving the security and reliability of software in general: http://secunia.com/secunia_research/ Secunia regularly hires new skilled team members. Check the URL below to see currently vacant positions: http://secunia.com/corporate/jobs/ Secunia offers a FREE mailing list called Secunia Security Advisories: http://secunia.com/advisories/mailing_lists/ ====================================================================== 10) Verification Please verify this advisory by visiting the Secunia website: http://secunia.com/secunia_research/2008-57/ Complete list of vulnerability reports published by Secunia Research: http://secunia.com/secunia_research/ ======================================================================