Public Vulnerability Reports

Trend Micro ServerProtect Web Interface Authorization Bypass Vulnerability

02.16.07

BACKGROUND

Trend ServerProtect is an Anti-virus application designed to run on file servers to catch viruses before they make it to network users. More information can be found on the vendors site at:

http://www.trendmicro.com/en/products/file-server/sp-linux/evaluate/overview.htm

DESCRIPTION

TrendMicro's ServerProtect product uses a web interface which runs on port TCP 14942 to configure the product. This interface is protected with a user configurable password. Upon successful login, a cookie is set with the name 'splx_2376_info' and a valid session id as its value.

The ServerProtect web application suffers from a design error vulnerability in its authorization checking routines. Attackers can gain full access to the web application by requesting any internal page while supplying their own 'splx_2376_info' cookie with an arbitrary value.

ANALYSIS

Exploitation of this vulnerability allows a remote attacker to edit and disable Anti-Virus features on the server machine.

Cookie values can be easily edited using raw HTTP requests or tools such as intercept proxies and browser plug-ins. By not checking for a valid session id and only looking for the cookie name, any value can grant an attacker full access to the web application.

DETECTION

iDefense has confirmed this vulnerability in Trend ServerProtect v1.3 for Linux. This vulnerability is not present in the Windows based versions of Server protect.

WORKAROUND

iDefense recommends limiting network access to the ServerProtect web interface to trusted clients.

VENDOR RESPONSE

Trend Micro has address this vulnerability with a patch release. More information is available at the Trend Micro Update Center for ServerProtect for Linux at the following URL.

http://www.trendmicro.com/download/product.asp?productid=20

CVE INFORMATION

A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not been assigned yet.

DISCLOSURE TIMELINE

01/17/2007 Initial vendor notification
01/24/2007 Initial vendor response
02/16/2007 Coordinated public disclosure

CREDIT

This vulnerability was reported to iDefense by Damian Put.

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LEGAL NOTICES

Copyright © 2007 Verisign, Inc.

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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.