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July 2007

iDefense Security Advisories concerning Trend Micro OfficeScan

ID: 3261
Date: 23 July 2007 12:08

Title: iDefense Security Advisories concerning Trend Micro OfficeScan
Abstract: Details of security advisories: Trend Micro OfficeScan Management Console Authorization Bypass Vulnerability Trend Micro OfficeScan Session Cookie Buffer Overflow Vulnerability
Vendors affected:Trend Micro
Availability of fix: Available
Type of fix: Patch

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

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@idefense.com 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.

Trend Micro OfficeScan Session Cookie Buffer Overflow Vulnerability

iDefense Security Advisory 07.16.07
http://labs.idefense.com/intelligence/vulnerabilities/
Jul 16, 2007

I. BACKGROUND

http://us.trendmicro.com/us/products/enterprise/officescan-client-server-edition/

II. DESCRIPTION

Remote exploitation of a stack-based buffer overflow vulnerability in Trend
Micro Inc.'s OfficeScan for Windows could allow attackers to execute arbitrary
code with the privileges of the IIS Web User.

The OfficeScan installation includes a series of CGI executables that are used
for configuration through the Web interface. A shared library, CGIOCommon.dll,
is used by many of these binaries to access environment variables passed to
them from the parent IIS process. If a malicious Web request is made for a
vulnerable binary, including an overly long session cookie, a stack-based
Unicode buffer overflow will occur.

III. ANALYSIS

Exploitation allows attackers to execute arbitrary code with the permissions
of the IIS Web user. Exploitation does not require authentication.

While the IIS Web user account is a limited account, this attack could be used
to conduct further privilege escalation attacks.

IV. DETECTION

iDefense has confirmed this vulnerability in OfficeScan 7.3 with all current
patches applied. Testing has shown that this attack can be conducted by
requesting multiple CGI binaries that make use of the shared library. Other
versions are suspected to be vulnerable.

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-2007-3454 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

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

IX. CREDIT

The discoverer of this vulnerability wishes to remain anonymous.

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

CPNI wishes to acknowledge the contributions of iDefense & Trend Micro
for the information contained in this advisory.

This advisory contains information released by the original author. Some of the information may have changed since it was released. If the issue affects you, it may be prudent to retrieve the advisory from the site of the original source to ensure that you receive the most current information concerning that problem. Reference to any specific commercial product, process, or service by trade name, trademark manufacturer, or otherwise, does not constitute or imply its endorsement, recommendation, or favouring by CPNI.

The views and opinions of authors expressed within this notice shall not be used for advertising or product endorsement purposes. CPNI shall not accept responsibility for any errors or omissions contained within this advisory. In particular, they shall not be liable for any loss or damage whatsoever, arising from or in connection with the usage of information contained within this advisory.

CSIRTUK is a member of the Forum of Incident Response and Security Teams (FIRST) and has contacts with other international Incident Response Teams (IRTs) in order to foster cooperation and coordination in incident prevention, to prompt rapid reaction to incidents, and to promote information sharing amongst its members and the community at large.