From ebb8c2d528e07df71c345826fc1290327b1e369e Mon Sep 17 00:00:00 2001
From: Steve Dower <steve.dower@microsoft.com>
Date: Tue, 10 Mar 2015 13:17:21 -0700
Subject: [PATCH] Issue #22028: Ensure mimetypes will not open registry keys
 with embedded nulls

---
 Lib/mimetypes.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Lib/mimetypes.py b/Lib/mimetypes.py
index b98c8749f63..d64726b80fb 100644
--- a/Lib/mimetypes.py
+++ b/Lib/mimetypes.py
@@ -246,7 +246,8 @@ class MimeTypes:
                 except EnvironmentError:
                     break
                 else:
-                    yield ctype
+                    if '\0' not in ctype:
+                        yield ctype
                 i += 1
 
         with _winreg.OpenKey(_winreg.HKEY_CLASSES_ROOT, '') as hkcr: