====================================================================== Secunia Research 22/08/2008 - Trend Micro Products Web Management Authentication Bypass - ====================================================================== 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 * Trend Micro OfficeScan 7.0 * Trend Micro OfficeScan 7.3 * Trend Micro OfficeScan 8.0 * Worry-Free Business Security 5.0 * Trend Micro Client/Server/Messaging Suite 3.5 * Trend Micro Client/Server/Messaging Suite 3.6 NOTE: Other versions may also be affected. ====================================================================== 2) Severity Rating: Moderately critical Impact: Security bypass Where: Local network ====================================================================== 3) Vendor's Description of Software "Protect your desktops, laptops, and file servers with OfficeScan?, comprehensive security against today?s complex, blended threats and Web-based attacks." Product Link: http://us.trendmicro.com/us/products/enterprise/officescan-client- server-edition/ ====================================================================== 4) Description of Vulnerability Secunia Research has discovered a vulnerability in certain Trend Micro products, which can be exploited by malicious people to bypass authentication. The vulnerability is caused by insufficient entropy being used to create a random session token for identifying an authenticated manager using the web management console. The entropy in the session token comes solely from the system time when the real manager logs in with a granularity of one second. This can be exploited to impersonate a currently logged on manager by brute forcing the authentication token. Successful exploitation further allows execution of arbitrary code via manipulation of the configuration. ====================================================================== 5) Solution The vendor has issued patches for Trend Micro OfficeScan 8.0 and Worry-Free Business Security 5.0. Fixes for other affected versions should be available shortly. ====================================================================== 6) Time Table 12/08/2008 - Vendor notified. 12/08/2008 - Vendor response. 16/08/2008 - Vendor provides status update. 22/08/2008 - Vendor issues patches for some of the affected products. 22/08/2008 - Public disclosure. ====================================================================== 7) Credits Discovered by Dyon Balding, Secunia Research. ====================================================================== 8) References The Common Vulnerabilities and Exposures (CVE) project has assigned CVE-2008-2433 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://corporate.secunia.com/ 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/ 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://corporate.secunia.com/secunia_research/33/ Secunia regularly hires new skilled team members. Check the URL below to see currently vacant positions: http://secunia.com/secunia_vacancies/ Secunia offers a FREE mailing list called Secunia Security Advisories: http://secunia.com/secunia_security_advisories/ ====================================================================== 10) Verification Please verify this advisory by visiting the Secunia website: http://secunia.com/secunia_research/2008-31/ Complete list of vulnerability reports published by Secunia Research: http://secunia.com/secunia_research/ ======================================================================