[NT] Easy Chat Server Multiple Vulnerabilities
From: SecuriTeam (support_at_securiteam.com)
To: firstname.lastname@example.org Date: 4 Jul 2004 20:03:59 +0200
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Easy Chat Server Multiple Vulnerabilities
" <http://www.echatserver.com/> Easy Chat Server is a easy, fast and
affordable way to host and manage your own real-time communication
software, it allows friends/colleagues to chat with you through a Web
Browser (IE, Netscape, Mozilla, Opera etc.) on any computer (Windows,
Linux, Solaris...) without any special plug-ins or software. It can help
you setup your community chat rooms, collaborative work sessions or online
meetings". Easy Chat suffers from vulnerabilities that allow malicious
users to crash it in more than one way, one of which is the addition of an
unusually large amount of users.
* Easy Char server version 1.2
* It is possible to crash the server by providing a very long username
string. The string is not bounds checked and an overly long string will
bring down the server.
* The program has no good checks on the users who enter free rooms.
Therefore it's possible to add an arbitrarily large number of fake users
to the system eventually causing it to crash.
The first issue can be tested using the following request:
GET /chat.ghp?username=aaaa[ 295 of a ]aaaa&password=&room=1&sex=0
The second can be tested by:
Which will create a fake user on the system with the provided password.
Naturally, issuing many such requests with bogus (perhaps random)
usernames will eventually cause the server to crash.
The vendor has been contacted and a fix will be out in the next version of
The information has been provided by <mailto:email@example.com>
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