Trend Micro OfficeScan Management Console Authorization Bypass Vulnerability
iDefense Security Advisory 07.16.07
Jul 16, 2007
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.
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
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
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
VIII. DISCLOSURE TIMELINE
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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