[ekohl] 46347: [NTOSKRNL] NtAccessCheck: - Fix returned status if the token is not an impersonation token. - Add a check for the token impersonation level.

Author: ekohl
Date: Tue Mar 23 01:16:14 2010
New Revision: 46347

URL: http://svn.reactos.org/svn/reactos?rev=46347&view=rev
Log:
[NTOSKRNL]
NtAccessCheck:
- Fix returned status if the token is not an impersonation token.
- Add a check for the token impersonation level.

Modified:
    trunk/reactos/ntoskrnl/se/semgr.c

Modified: trunk/reactos/ntoskrnl/se/semgr.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/se/semgr.c?rev=46…
==============================================================================
--- trunk/reactos/ntoskrnl/se/semgr.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/se/semgr.c [iso-8859-1] Tue Mar 23 01:16:14 2010
@@ -743,7 +743,15 @@
     {
         DPRINT1("No impersonation token\n");
         ObDereferenceObject(Token);
-        return STATUS_ACCESS_DENIED;
+        return STATUS_NO_IMPERSONATION_TOKEN;
+    }
+
+    /* Check the impersonation level */
+    if (Token->ImpersonationLevel < SecurityIdentification)
+    {
+        DPRINT1("Impersonation level < SecurityIdentification\n");
+        ObDereferenceObject(Token);
+        return STATUS_BAD_IMPERSONATION_LEVEL;
     }
 
     /* Set up the subject context, and lock it */