Public Vulnerability Reports

Trend Micro OfficeScan Management Console Authorization Bypass Vulnerability



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.


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.


Exploitation allows attackers to manage the OfficeScan application settings and the setting of the antivirus clients which it controls.


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.


iDefense is currently unaware of any workaround for this issue.


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

 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


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 (, which standardizes names for security problems.


06/14/2007 Initial vendor notification
06/20/2007 Initial vendor response
07/16/2007 Coordinated public disclosure


This vulnerability was reported to iDefense by David Maciejak.

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Copyright © 2007 Verisign, Inc.

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