Trend Micro OfficeScan Management Console Authorization Bypass Vulnerability iDefense Security Advisory 07.16.07 http://labs.idefense.com/intelligence/vulnerabilities/ Jul 16, 2007 I. BACKGROUND Trend Micro OfficeScan is a centrally managed AntiVirus solution that allows administrators to manage virus and spyware protection in business environments. More information can be found on the vendors site at the following URL. http://us.trendmicro.com/us/products/enterprise/officescan-client-server-edition/ II. DESCRIPTION Remote exploitation of an authorization bypass vulnerability in Trend Micro Inc.'s OfficeScan for Windows could allow attackers to login to the management console and alter application settings. The OfficeScan installation includes a web management console that allows administrators to configure the application and the Antivirus clients it manages. The web interface login is handled by cgiChkMasterPwd.exe which is passed a hash and an encrypted version of the password generated by an ActiveX control on the login page. If cgiChkMasterPwd.exe is sent an empty encryption string and empty hash it proceeds to issue the client a valid session id which can then be used to access the web management console. III. ANALYSIS Exploitation allows attackers to manage the OfficeScan application settings and the setting of the antivirus clients which it controls. IV. DETECTION iDefense has confirmed the existence of this vulnerability in OfficeScan for Windows 7.3 with all current patches applied. Previous versions may also be affected. V. WORKAROUND iDefense is currently unaware of any workaround for this issue. VI. VENDOR RESPONSE Trend Micro has addressed this vulnerability by releasing the following patches for affected products. CSM3.6 security patch 1149 CSM3.5 security patch 1152 CSM3.0 security patch 1209 http://www.trendmicro.com/download/product.asp?productid=39 OSCE 8.0 security patch 1042 OSCE 7.3 security patch 1293 OSCE 7.0 security patch 1364 OSCE 6.5 security patch 1364 OSCE 6.0 for SMB2.0 security patch 1398 http://www.trendmicro.com/download/product.asp?productid=5 VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2007-3455 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org/), which standardizes names for security problems. VIII. DISCLOSURE TIMELINE 06/14/2007 Initial vendor notification 06/20/2007 Initial vendor response 07/16/2007 Coordinated public disclosure IX. CREDIT This vulnerability was reported to iDefense by David Maciejak. Get paid for vulnerability research http://labs.idefense.com/methodology/vulnerability/vcp.php Free tools, research and upcoming events http://labs.idefense.com/ X. LEGAL NOTICES Copyright © 2007 iDefense, Inc. Permission is granted for the redistribution of this alert electronically. It may not be edited in any way without the express written consent of iDefense. If you wish to reprint the whole or any part of this alert in any other medium other than electronically, please e-mail customerservice@private for permission. Disclaimer: The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.
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