From 4a74e9edcc6a8acba1616b53f14a0dec41bdf4ac Mon Sep 17 00:00:00 2001
From: Philippe Antoine <contact@catenacyber.fr>
Date: Thu, 6 Jun 2019 15:42:47 +0200
Subject: [PATCH] signature: error for rules with illegal port

Fixes #2080
---
 src/detect-engine-port.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/detect-engine-port.c b/src/detect-engine-port.c
index 36083e5bc1..d935d90740 100644
--- a/src/detect-engine-port.c
+++ b/src/detect-engine-port.c
@@ -1465,7 +1465,10 @@ error:
  */
 int DetectPortIsValidRange(char *port)
 {
-    if(atoi(port) >= 0 && atoi(port) <= 65535)
+    char *end;
+    long r = strtol(port, &end, 10);
+
+    if(*end == 0 && r >= 0 && r <= 65535)
         return 1;
     else
         return 0;