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Validate & sanitize formspec fields (#3022)

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Lars Müller 2023-04-08 18:13:45 +02:00 • committed by GitHub
parent 4c6e19968a
commit 833ed77620
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4 changed files with 16 additions and 9 deletions
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6
mods/default/nodes.lua
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@ -2597,12 +2597,12 @@ local function register_sign(material, desc, def)
if not text then
return
end
if string.len(text) > 512 then
if #text > 512 then
minetest.chat_send_player(player_name, S("Text too long"))
return
end
default.log_player_action(sender, "wrote \"" .. text ..
"\" to the sign at", pos)
text = text:gsub("[%z-\8\11-\31\127]", "") -- strip naughty control characters (keeps \t and \n)
default.log_player_action(sender, ("wrote %q to the sign at"):format(text), pos)
local meta = minetest.get_meta(pos)
meta:set_string("text", text)