Fixed ruby 1.9 String Indexing issue, using Rex::Text.uri_encode

modules/exploits/multi/http/php_cgi_arg_injection.rb

@@ -29,7 +29,8 @@ class Metasploit3 < Msf::Exploit::Remote
 				a system-defined manner" from the RFC) and then passes them to the CGI
 				binary."
 			},
-			'Author'         => [ 'egypt', 'hdm' ],
+			'Author'         => [ 'egypt', 'hdm', #original msf exploit
+					      'jjarmoc' ],    #added URI encoding obfuscation
 			'License'        => MSF_LICENSE,
 			'Version'        => '$Revision$',
 			'References'     => [
@@ -177,7 +178,7 @@ class Metasploit3 < Msf::Exploit::Remote
 				max.times { chars << rand(string.length)}
 			end
 		end
-		chars.uniq.sort.reverse.each{|index|  string[index] = "%"+"%02x" % string[index]}
+		chars.uniq.sort.reverse.each{|index|  string[index] = Rex::Text.uri_encode(string[index,1], "hex-all")}
 		string
 	end