Vulnerability Note VU#117139

Sambar Web Server vulnerable to sourcecode disclosure due to improper parsing of scripts

Overview

Sambar Webserver displays script contents instead of interpreting them when the user adds certain characters to the end of the script URL.

I. Description

Sambar Webserver is designed to handle CGI requests by interpreting CGI scripts to produce output returned to the client. However, due to flaws in Sambar Webserver's URL parsing, it is possible to trick the server into into thinking that a CGI script is a regular file and serving the script's contents instead of interpreting the script. This problem occurs when the client adds a space and a null byte to the end of the script URL.

II. Impact

Attackers can access information that may be considered sensitive, including usernames or passwords contained in CGI scripts.

III. Solution

Apply a patch from your vendor

Upgrade to version 5.2b, available at:

http://sambar.dnsalias.org/win32-preview.tar.gz

Remove all CGI scripts from the server, or limit the sensitive information in your CGI scripts.

Systems Affected

Vendor	Status	Date Notified	Date Updated
Sambar Technologies	Vulnerable	7-Jun-2002

References

http://www.sambar.com
http://sambar.dnsaloas.org/win32-preview.tar.gz
http://www.securityfocus.com/bid/4533

Credit

The content of this document is based on information provided by Peter Gr�ndl.

This document was written by Shawn Van Ittersum and Jeffrey P. Lanza.

Other Information

Date Public:	2002-04-17
Date First Published:	2002-07-29
Date Last Updated:	2003-05-19
CERT Advisory:
CVE-ID(s):	CVE-2002-0737
NVD-ID(s):	CVE-2002-0737
US-CERT Technical Alerts:
Severity Metric:	4.56
Document Revision:	12

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