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labs33.html

labs33.html
Posted Feb 9, 2000
Authored by Underground Security Systems Research

USSR Advisory #33 - InterAccess Telnetd 4.0 for Windows NT has a remotely exploitable buffer overflow at the login: prompt.

tags | overflow
systems | windows
SHA-256 | 696908771becb481e1b646a43085ad771f7dd89ee4ac08e93e721f31c574653a

labs33.html

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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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