From d0be8238074dd15254838e4af12069ff4bef67d2 Mon Sep 17 00:00:00 2001
From: Kahrl <kahrl@gmx.net>
Date: Mon, 8 Dec 2014 07:47:51 +0100
Subject: [PATCH] Always escape user provided data in mainmenu fields

---
 builtin/mainmenu/tab_multiplayer.lua | 9 ++++++---
 builtin/mainmenu/tab_server.lua      | 8 ++++----
 builtin/mainmenu/tab_simple_main.lua | 9 ++++++---
 3 files changed, 16 insertions(+), 10 deletions(-)

diff --git a/builtin/mainmenu/tab_multiplayer.lua b/builtin/mainmenu/tab_multiplayer.lua
index c3a7d921e..b235eaecf 100644
--- a/builtin/mainmenu/tab_multiplayer.lua
+++ b/builtin/mainmenu/tab_multiplayer.lua
@@ -24,8 +24,10 @@ local function get_formspec(tabview, name, tabdata)
 		"label[1,-0.25;".. fgettext("Favorites:") .. "]"..
 		"label[1,4.25;".. fgettext("Address/Port") .. "]"..
 		"label[9,2.75;".. fgettext("Name/Password") .. "]" ..
-		"field[1.25,5.25;5.5,0.5;te_address;;" ..core.setting_get("address") .."]" ..
-		"field[6.75,5.25;2.25,0.5;te_port;;" ..core.setting_get("remote_port") .."]" ..
+		"field[1.25,5.25;5.5,0.5;te_address;;" ..
+		core.formspec_escape(core.setting_get("address")) .."]" ..
+		"field[6.75,5.25;2.25,0.5;te_port;;" ..
+		core.formspec_escape(core.setting_get("remote_port")) .."]" ..
 		"checkbox[1,3.6;cb_public_serverlist;".. fgettext("Public Serverlist") .. ";" ..
 		dump(core.setting_getbool("public_serverlist")) .. "]"
 
@@ -36,7 +38,8 @@ local function get_formspec(tabview, name, tabdata)
 
 	retval = retval ..
 		"button[9,4.95;2.5,0.5;btn_mp_connect;".. fgettext("Connect") .. "]" ..
-		"field[9.3,3.75;2.5,0.5;te_name;;" ..core.setting_get("name") .."]" ..
+		"field[9.3,3.75;2.5,0.5;te_name;;" ..
+		core.formspec_escape(core.setting_get("name")) .."]" ..
 		"pwdfield[9.3,4.5;2.5,0.5;te_pwd;]" ..
 		"textarea[9.3,0.25;2.5,2.75;;"
 		
diff --git a/builtin/mainmenu/tab_server.lua b/builtin/mainmenu/tab_server.lua
index 154a54cc7..34706efbe 100644
--- a/builtin/mainmenu/tab_server.lua
+++ b/builtin/mainmenu/tab_server.lua
@@ -36,20 +36,20 @@ local function get_formspec(tabview, name, tabdata)
 		"checkbox[0.5,1.15;cb_server_announce;".. fgettext("Public") .. ";" ..
 		dump(core.setting_getbool("server_announce")) .. "]"..
 		"field[0.8,3.2;3.5,0.5;te_playername;".. fgettext("Name") .. ";" ..
-		core.setting_get("name") .. "]" ..
+		core.formspec_escape(core.setting_get("name")) .. "]" ..
 		"pwdfield[0.8,4.2;3.5,0.5;te_passwd;".. fgettext("Password") .. "]"
 		
 	local bind_addr = core.setting_get("bind_address")
 	if bind_addr ~= nil and bind_addr ~= "" then
 		retval = retval ..
 			"field[0.8,5.2;2.25,0.5;te_serveraddr;".. fgettext("Bind Address") .. ";" ..
-			core.setting_get("bind_address") .."]" ..
+			core.formspec_escape(core.setting_get("bind_address")) .."]" ..
 			"field[3.05,5.2;1.25,0.5;te_serverport;".. fgettext("Port") .. ";" ..
-			core.setting_get("port") .."]"
+			core.formspec_escape(core.setting_get("port")) .."]"
 	else
 		retval = retval ..
 			"field[0.8,5.2;3.5,0.5;te_serverport;".. fgettext("Server Port") .. ";" ..
-			core.setting_get("port") .."]"
+			core.formspec_escape(core.setting_get("port")) .."]"
 	end
 	
 	retval = retval ..
diff --git a/builtin/mainmenu/tab_simple_main.lua b/builtin/mainmenu/tab_simple_main.lua
index 0724acf87..b48e523f3 100644
--- a/builtin/mainmenu/tab_simple_main.lua
+++ b/builtin/mainmenu/tab_simple_main.lua
@@ -23,14 +23,17 @@ local function get_formspec(tabview, name, tabdata)
 
 	retval = retval ..
 		"label[8,0.5;".. fgettext("Name/Password") .. "]" ..
-		"field[0.25,3.25;5.5,0.5;te_address;;" ..core.setting_get("address") .."]" ..
-		"field[5.75,3.25;2.25,0.5;te_port;;" ..core.setting_get("remote_port") .."]" ..
+		"field[0.25,3.25;5.5,0.5;te_address;;" ..
+		core.formspec_escape(core.setting_get("address")) .."]" ..
+		"field[5.75,3.25;2.25,0.5;te_port;;" ..
+		core.formspec_escape(core.setting_get("remote_port")) .."]" ..
 		"checkbox[8,-0.25;cb_public_serverlist;".. fgettext("Public Serverlist") .. ";" ..
 		render_details .. "]"
 
 	retval = retval ..
 		"button[8,2.5;4,1.5;btn_mp_connect;".. fgettext("Connect") .. "]" ..
-		"field[8.75,1.5;3.5,0.5;te_name;;" ..core.setting_get("name") .."]" ..
+		"field[8.75,1.5;3.5,0.5;te_name;;" ..
+		core.formspec_escape(core.setting_get("name")) .."]" ..
 		"pwdfield[8.75,2.3;3.5,0.5;te_pwd;]"
 
 	--favourites