Multiple vulnerabilities in WinShadow

[Bahaa Naamneh <b_naamneh@hotmail.com>]

Multiple vulnerabilities in WinShadow
-------------------------------------


Affected Systems: OmniCom WinShadow

version: 2.0 (and possibly earlier versions)

Vendor: OmniCom Technologies - http://www.omnicomtech.com

Issue: 1. Buffer overflow in client handling hostnames in host files
       2. DoS against server

Released: 27 September 2003


Introduction:
=============
"winshdow: Create a secure remote control session on the Internet or private 
WAN/LAN network allowing easy access to remote files and applications. Increase 
productivity by allowing secure remote access for mobile users and system 
administrators."

- Vendors Description
   [ http://www.omnicomtech.com ]


Details:
========
Multiple vulnerabilities has been identified in winShadow version 2.0, which 
allows malicious users to execute arbitrary code on the master client and 
remotely crash the server. 

Buffer Overflow:
----------------
winShadow saves hostnames in host files (*.osh), the process handing the 
hostname parameter read from the file will cause a buffer overflow if 
approximately 250 bytes are passed after this parameter.

Denial of Service:
------------------
By connecting to the server and issuing a long username or password, the server 
will crash, refusing any further connections until the server is closed by 
logging off or rebooting the system, this may be because it a service that runs 
with system privileges.


Vendor status:
==============
The vendor has been informed.


Exploit:
========
Can be downloaded from http://www.elitehaven.net/winshadow.zip
The exploit was written by Peter Winter-Smith.


Discovered by/Credit:
=====================
Bahaa Naamneh
b_naamneh@hotmail.com
http://www.bsecurity.tk