Can we prevent IE exploits a priori?
We all know that yet another critical IE vulnerability (download.ject [aka
SCOB, finally patched by M$ after 10 months] caused some high profile groups
(http://slate.msn.com/id/2103152/, http://www.theinquirer.net/?article=16922,
slashdot.org/articles/04/07/02/1441242.shtml?tid=103&tid=113&tid=126&tid=172&tid=95&tid=99)
to suggest that people stop using Internet Explorer. Yet a variation on SCOB
(shell.application), remains unpatched, allowing our favorite Russian spam
crime lords another crack people's boxes. Of course, I use Mozilla, but some
of my clients use IE and won't give it up, so I started to look around for a
permanent fix, something that could prevent these attacks a priori.
I found this post (http://seclists.org/lists/bugtraq/2004/May/0153.html) on
Bugtraq, from Thor Larholm which claims that his company
(http://pivx.com/qwikfix/) has fixed all of these problems, half a year ago,
with his program Qwik-fix. It apparently does this by harderning IE's "my
local machine" zone (which is only visible if you hack the registry) and
proactively prevent these type of attacks for good. Another program, Smartfix
((http://www.einfodaily.com/about.php#smartfix)), claims to do the same, so I
decided to try these programs.
I found Smartfix to be an unbearable resource hog on even a burly laptop,
maxing the CPU almost every time I opened a web page in any browser, so I
ripped it off my system. On the other hand, Qwik-Fix is MIA for me. Despite
being supposedly available from multiple locations, in various versions (0.58
beta: http://www.majorgeeks.com/download4033.html , 0.57 beta:
http://fileforum.betanews.com/detail/1068047556/1 , and 0.60 beta:
http://superdownloads.ubbi.com.br/download/i24346.html), none of the downloads
work right. The site doesn't list the current version, so I don't know if the
0.60 beta is even the latest version. Anyway, all of the downloads either
fail, or when you get one of them and try to install it, the application
attempts to download an MSI file that doesn't exist on the server. The Bugtraq
post says you can download it from their site, but the download page
(http://pivx.com/qwikfix/download.html) only allows you to email them so they
can send you a copy. I
still haven't heard from them. I don't mean to flame you Thor, as your
client list is certainly impressive: (http://pivx.com/clients.html) I just
can't seem to get your program from anywhere.
So I wanted to know, has anyone tried these programs successfully? Can anyone
validate their claims? Better yet, does anyone have a link to a "how to" doc,
that tells smart geeks how to make the registry changes ourselves, so we don't
have to rely on some program to do it for us?