From 490083eebe545d753089f9ec90957d5ec68a4e45 Mon Sep 17 00:00:00 2001
From: Bob Halley <halley@nominum.com>
Date: Tue, 12 Jul 2011 17:57:21 -0700
Subject: [PATCH] increase IPv4 parsing strictness yet more

---
 dns/ipv4.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/dns/ipv4.py b/dns/ipv4.py
index 1860ddcb..f3b6c5c5 100644
--- a/dns/ipv4.py
+++ b/dns/ipv4.py
@@ -28,6 +28,12 @@ def inet_aton(text):
     parts = text.split('.')
     if len(parts) != 4:
         raise dns.exception.SyntaxError
+    for part in parts:
+        if not part.isdigit():
+            raise dns.exception.SyntaxError
+        if len(part) > 1 and part[0] == '0':
+            # No leading zeros
+            raise dns.exception.SyntaxError
     try:
         bytes = [int(part) for part in parts]
         return struct.pack('BBBB', *bytes)
-- 
2.47.3