From: Vsevolod Stakhov <vsevolod@highsecure.ru>
Date: Tue, 5 Nov 2019 10:50:34 +0000 (+0000)
Subject: [Fix] Rbl: Allow utf8 lookups for IDN domains
X-Git-Tag: 2.2~83
X-Git-Url: https://source.dussan.org/?a=commitdiff_plain;h=1ee4b159437edc1d991860008371f587c3283cda;p=rspamd.git

[Fix] Rbl: Allow utf8 lookups for IDN domains

Issue: #3137
---

diff --git a/src/plugins/lua/rbl.lua b/src/plugins/lua/rbl.lua
index 623de0a37..521e63708 100644
--- a/src/plugins/lua/rbl.lua
+++ b/src/plugins/lua/rbl.lua
@@ -70,9 +70,12 @@ local function validate_dns(lstr)
     -- two dots in a row
     return false
   end
+  if not rspamd_util.is_valid_utf8(lstr) then
+    -- invalid utf8 detected
+    return false
+  end
   for v in lstr:gmatch('[^%.]+') do
-    if not v:match('^[%w-]+$') or v:len() > 63
-        or v:match('^-') or v:match('-$') then
+    if v:len() > 63 or v:match('^-') or v:match('-$') then
       -- too long label or weird labels
       return false
     end