Another backdoor to secure mode

JF Martinez (
Tue, 23 Jul 1996 00:34:30 +0200

We all know back door number one: modules. There is another one the
IOPL and IOPERM system calls. If I am not wrong nothing impedes a
privileged program of writing directly to disk with these calls. Of
course it will to know about disk handling and file system layout.

The problem is: X windows needs these calls, so if you forbid them in
secure mode then bye bye X.

I am unsubscribing from the mail list due to holidays so CC comments to
my personal address.


Jean Francois Martinez

Join the Free World side in the holy war against Microsoft's Evil Empire. (Ronald Reagan)