Application: ParaChat Server
              http://www.parachat.com/

Version: 5.5
Bug: directory traversal
Date: 28-Sep-2004
Author: Donato Ferrante
              e-mail: fdonato_at_autistici.org
              xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx


1. Description
2. The bug
3. The code
4. The fix

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

----------------
1. Description:
----------------


Vendor's Description:


"ParaChat Server v5.5 is a fast, easy and affordable way to host and
manage your own real-time communication software - for one web site,
or for multiple web sites."

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

------------
2. The bug:
------------


The server is not able to manage the sequence "..%5C/", that is
equal to "..\/", this lets an attacker to navigate through the
victim system simply using a web browser.


xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx


-------------
3. The code:
-------------


To test the vulnerability:


http://[host]:7877/..%5C/..%5C/

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx


------------
4. The fix:
------------

Vendor was contacted.
Bug will be fixed in the next version.


xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx