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                                 Delphis Consulting Plc
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                               Security Team Advisories
                                    [30/05/2000]
                                        
      
                             securityteam@delphisplc.com
                  [http://www.delphisplc.com/thinking/whitepapers/]
        
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Adv     :       DST2K0007
Title   :       Buffer Overrun in ITHouse Mail Server v1.04
Author  :       DCIST (securityteam@delphisplc.com)
O/S     :       Microsoft Windows NT v4.0 Workstation (SP6)
Product :       ITHouse Mail Server v1.04
Date    :       30/05/2000

I.    Description

II.   Solution

III.  Disclaimer


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I. Description
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Delphis Consulting Internet Security Team (DCIST) discovered the following
vulnerability in the ITHouse Mail Server under Windows NT.

Sending an email via SMTP to an IT House Mail Server with a recipient's name in
excess of 2270 bytes causes the IT House Mail Server to buffer overrun overwriting
the EIP (2270 + EIP). This could allow an attacker to execute arbitrary code on the 
the server.

Example:
HELO example.org
MAIL FROM:example@example.org
RCPT TO:<A x 2270> + EIP
DATA

.
QUIT

Wait for the mail delivery routine to start at which point the server will crash
executing the arbitrary code.


II. Solution
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Vendor Status: Informed

Currently there is no known solution to this problem.


III. Disclaimer
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THE INFORMATION CONTAINED IN THIS ADVISORY IS BELIEVED TO BE ACCURATE AT
THE TIME OF PRINTING, BUT NO REPRESENTATION OR WARRANTY IS GIVEN, EXPRESS OR
IMPLIED, AS TO ITS ACCURACY OR COMPLETENESS.  NEITHER THE AUTHOR NOR THE
PUBLISHER ACCEPTS ANY LIABILITY WHATSOEVER FOR ANY DIRECT, INDIRECT OR
CONSEQUENTIAL LOSS OR DAMAGE ARISING IN ANY WAY FROM ANY USE OF, OR RELIANCE
PLACED ON, THIS INFORMATION FOR ANY PURPOSE.
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