[UNIX] Penguin TraceRoute Allows Remote Command Execution

From: support@securiteam.com
Date: 03/22/02 

From: support@securiteam.com
To: list@securiteam.com
Date: Fri, 22 Mar 2002 11:37:05 +0100 (CET)

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  Penguin TraceRoute Allows Remote Command Execution
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SUMMARY

 <http://www.linux-directory.com/scripts/traceroute.shtml> Penguin
TraceRoute, a Perl based host trace routing program has been found to
contain a vulnerability that would allow remote attackers to cause the
perl script to execute arbitrary commands.

DETAILS

Vulnerable systems:
Penguin TraceRoute version 1.0

This script does not filter out any ; | characters thus allowing anyone to
execute arbitrary commands with the permissions of the running user
(usually 'nobody').

Example:
"127.0.0.1;cat /www/secure/.htpasswd"
Or if the user has write access:
"127.0.0.1;echo I iz 1337>index.html".

Fix:
Open up the perl script in your favorite text editor, find a line that has
"$host = $q->param('host');" Its usually the 13th line down then just add
this line "$host =~ s/[;\*\|'&\$!?#\(\)\[\]\{\}:'"\\]//g;" under it and
that should parse out any unwanted characters.

ADDITIONAL INFORMATION

The information has been provided by <mailto:jenkins@securityfreaks.com>
paul jenkins.

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