RE: how to break a personal firewall
- From: "James Grant" <jgrant@xxxxxxxxxxxx>
- Date: Tue, 3 Jan 2006 10:16:33 -0800
> While it's true that the speech was held a year ago your
> assumption that
> it wouldn't apply to current personal firewalls is wrong.
Not so. Look, you contradict yourself later on.
> In general we were exploiting a design flaw in Windows, not a bug or
> flaw in any specific personal firewall. Since the messaging system
> Windows uses for IPC between windows has not yet been re-designed, the
> things said back then still apply.
No. You were exploiting a limitation to the personal firewalls of the
time. The capabilities have been expanded. The exploit has been
prevented.
> As for Zone Alarm in particular: the free version is still susceptible
> to our attack. The pro version does intercept it, but since I
Here you admit I am right.
The rest is a commentary on usability, a pretty poor defense to
your grand claim.
> doubt that
> they have patched the Windows messaging system my guess (from a quick
> glance, maybe I'll take a closer look after the holidays) is that they
> hook into the message queues to intercept such attacks. That
> attempt is
> futile, though, since I simply need to place my hook before any other
> hook to circumvent it. Besides, the additional PopUps make the program
> completely unusable for normal users, because they won't
> understand the
> question (what do users know about "windows messages"?). Even
> more since
> the PopUps won't give the full path of the executable but just the
> filename.
This is not a forum for usability so I won't argue with you about it.
Your over-reaching claim has been addressed.
James Grant
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