From 32608c1b10f4646c9c3dda5110d52472cca86233 Mon Sep 17 00:00:00 2001
From: Steve Dower <steve.dower@microsoft.com>
Date: Tue, 10 Mar 2015 13:19:17 -0700
Subject: [PATCH] Issue #22028: Ensure mimetypes will not open registry keys
 with embedded nulls

---
 Lib/mimetypes.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Lib/mimetypes.py b/Lib/mimetypes.py
index ec8fd995ee97..a39b543c4c9a 100644
--- a/Lib/mimetypes.py
+++ b/Lib/mimetypes.py
@@ -242,9 +242,12 @@ class MimeTypes:
             i = 0
             while True:
                 try:
-                    yield _winreg.EnumKey(mimedb, i)
+                    ctype = _winreg.EnumKey(mimedb, i)
                 except EnvironmentError:
                     break
+                else:
+                    if '\0' not in ctype:
+                        yield ctype
                 i += 1
 
         default_encoding = sys.getdefaultencoding()
-- 
2.47.3