Fixes #2974. Adds an "Unknown" level to Exploit::CheckCode, fixes the URI check for exploit/unix/webapp/php_include (which was relying on Unknown).

git-svn-id: file:///home/svn/framework3/trunk@10694 4d416f70-5f16-0410-b530-b9f4589650da

lib/msf/core/exploit.rb

@@ -52,6 +52,11 @@ class Exploit < Msf::Module
 	##
 	module CheckCode
 
+		#
+		# Can't tell if the target is exploitable or not.
+		#
+		Unknown     = [-1, "Cannot reliably check exploitability."]
+
 		#
 		# The target is safe and is therefore not exploitable.
 		#

modules/exploits/unix/webapp/php_include.rb

@@ -62,7 +62,7 @@ class Metasploit3 < Msf::Exploit::Remote
 	end
 
 	def check
-		uri = datastore['PHPURI'].dup
+		uri = datastore['PHPURI'] ? datastore['PHPURI'].dup : ""
 		if(uri and ! uri.empty?)
 			uri.gsub!(/\?.*/, "")
 			print_status("Checking uri #{uri}")