Fix 'check()' in glossword_upload_exec

Author: bcoles

modules/exploits/multi/http/glossword_upload_exec.rb

@@ -60,12 +60,14 @@ def check
 		print_status("#{peer} - Authenticating as user '#{user}'")
 		begin
 			res = login(base, user, pass)
-			if res and res.code == 200
-				print_error("#{peer} - Authentication failed")
-				return Exploit::CheckCode::Unknown
-			elsif res.code == 301 and res.headers['set-cookie'] =~ /sid([\da-f]+)=([\da-f]{32})/
-				print_good("#{peer} - Authenticated successfully")
-				return Exploit::CheckCode::Appears
+			if res
+				if res.code == 200
+					print_error("#{peer} - Authentication failed")
+					return Exploit::CheckCode::Unknown
+				elsif res.code == 301 and res.headers['set-cookie'] =~ /sid([\da-f]+)=([\da-f]{32})/
+					print_good("#{peer} - Authenticated successfully")
+					return Exploit::CheckCode::Appears
+				end
 			end
 			return Exploit::CheckCode::Safe
 		rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout