From: Vsevolod Stakhov <vsevolod@rspamd.com>
Date: Sat, 30 Jul 2022 19:52:08 +0000 (+0100)
Subject: [Minor] Restrict `m` patterns in regexps
X-Git-Tag: 3.3~101
X-Git-Url: https://source.dussan.org/?a=commitdiff_plain;h=50101aca1924f3d4ca4db4c34580e7fc560771b4;p=rspamd.git

[Minor] Restrict `m` patterns in regexps

Issue: #4221
---

diff --git a/src/libutil/regexp.c b/src/libutil/regexp.c
index cd34a5998..534187f37 100644
--- a/src/libutil/regexp.c
+++ b/src/libutil/regexp.c
@@ -336,7 +336,7 @@ rspamd_regexp_new_len (const gchar *pattern, gsize len, const gchar *flags,
 		if (*start == '/') {
 			sep = '/';
 		}
-		else if (*start == 'm' && !g_ascii_isalnum(start[1])) {
+		else if (*start == 'm' && start[1] != '\\' && g_ascii_ispunct(start[1])) {
 			start ++;
 			sep = *start;