[UNIX] Webmin view_man.cgi Security Vulnerability

From: support@securiteam.com
Date: 12/25/01 

From: support@securiteam.com
To: list@securiteam.com
Date: Tue, 25 Dec 2001 07:53:01 +0100 (CET)

The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
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  Webmin view_man.cgi Security Vulnerability
------------------------------------------------------------------------

SUMMARY

 <http://www.webmin.com/webmin/> Webmin is a user administration tool
written by Jamie Cameron in Perl that is designed to be lightweight,
functional, and easily extensible. A security vulnerability in the product
allows remote attackers to execute arbitrary code by manipulating a user
provided information field.

DETAILS

Vulnerable systems:
Webmin version 0.91 and prior

Webmin's view_man.cgi does not do any input checking allowing commands to
be executed by using a special string inside a normal request. By default,
the server runs as root, allowing an attacker to execute commands as root.

Example:
By including inside such a URL as:
http://photon:10000/man/view_man.cgi?page=ipcs&sec=8&opts=&for=rm

A command, an attacker can cause the viewing of the man files to do other
things besides viewing of the man files, such as execution of arbitrary
commands.

Solution:
An update for the view_man module has been released, for more information
please see:
 <http://www.webmin.com/webmin/updates.html>
http://www.webmin.com/webmin/updates.html

ADDITIONAL INFORMATION

The information has been provided by Gobbles.

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