commit 7e1e6b9: [Minor] Mime_types: Add exclusion for numbers in extensions

[Vsevolod Stakhov]

Author: Vsevolod Stakhov
Date: 2018-12-27 14:46:37 +0000
URL: https://github.com/rspamd/rspamd/commit/7e1e6b947ddf30741e44bdca52150493e9bbf2fd

[Minor] Mime_types: Add exclusion for numbers in extensions

---
 src/plugins/lua/mime_types.lua | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/plugins/lua/mime_types.lua b/src/plugins/lua/mime_types.lua
index e52933af1..e13d535b4 100644
--- a/src/plugins/lua/mime_types.lua
+++ b/src/plugins/lua/mime_types.lua
@@ -1001,7 +1001,9 @@ local function check_mime_type(task)
               if ext2 then
                 local enc_ext = gen_extension(fl[1].name)
 
-                if enc_ext and enc_ext ~= ext2 then
+                if enc_ext and
+                    not string.match(ext2, '^%d+$')
+                    and enc_ext ~= ext2 then
                   task:insert_result(settings['symbol_double_extension'], 2.0,
                       string.format("%s!=%s", ext2, enc_ext))
                 end