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Local / Remote Exploiteable Buffer Overflow Vulnerability in InterAccess TelnetD Server 4.0 for Windows NT
From: labs () USSRBACK COM (Ussr Labs)
Date: Mon, 21 Feb 2000 01:41:10 -0300


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Local / Remote Exploiteable Buffer Overflow Vulnerability in
InterAccess TelnetD Server 4.0 for Windows NT

USSR Advisory Code:   USSR-2000033

Release Date:
February 22, 2000

Systems Affected:
InterAccess TelnetD Server 4.0 for Windows NT  and possibly others
versions.

THE PROBLEM

UssrLabs found a Local / Remote Buffer overflow, The code that
handles the login commands in the telnet session
has an unchecked buffer that will allow arbitrary code to be executed
if it is overflowed.

Example:
[hellme () die-communitech net$ telnet example.com
Trying example.com...
Connected to example.com.
Escape character is '^]'.

InterAccess TelnetD Server (30 Day Trial Version)
Release 4.0
Copyright (C) 1994-1999 by Pragma Systems, Inc.
All rights reserved.

This copy will expire on Tue Mar 21 21:55:14 2000

login name:  (buffer)

Where [buffer] is aprox. 300 characters.

Binary or source for this Exploit:

http://www.ussrback.com/

Exploit: the Exploit, lags the machine until 100% cpu time

Vendor Status:
i email the vendor 4 times, and i dont have any responce :(

Vendor   Url: http://www.pragmasys.com/
Program Url: http://www.pragmasys.com/TelnetD/

Credit: USSRLABS

SOLUTION
 Noting yet.

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

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

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