Re: GFI Download Security
- From: "Jim Harrison" <jim@xxxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Tue, 8 Jun 2004 08:01:17 -0700
Actually, you don't even have to be web response-specific.
Any Internet-based site delivering a header or URL-style element containing:
"C:\"
"ms-its":
.. deserves to be blocked.
Jim Harrison
MCP(NT4, W2K), A+, Network+, PCG
http://www.microsoft.com/isaserver
http://isaserver.org/Jim_Harrison
http://isatools.org
Read the help, books and articles!
----- Original Message -----
From: "David Farinic" <davidf@xxxxxxx>
To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
Sent: Tuesday, June 08, 2004 07:27
Subject: [isalist] Re: GFI Download Security
http://www.ISAserver.org
To add fresh example to my previous reply post:
There is new 0 day exploit used by more addware/spyware....==Malware.
If you have DownloadSecurity6, it blocks it.
ISA2004 users without DownloadSecurity can use http header checking feature to
Block this malicious code.
Check if 302 reply is found with string in http header:" ms-its:" &
"Help\iexplore.chm"
Then block this connection .
This is reply from webserver you have to block:
====
HTTP/1.1 302 Found Via: 1.0 ISASERVER Connection: Keep-Alive
Proxy-Connection: Keep-Alive Content-Length: 4 Date: Tue, 08 Jun
2004 08:00:49 GMT Location:
URL:ms-its:C:\WINDOWS\Help\iexplore.chm::/iegetsrt.htm Content-Type: text/html
Server: Resin/2.1.11
====
"Location: URL:ms-its:C:\WINDOWS\Help\iexplore.chm::/iegetsrt.htm" shouldn't
pass trough otherwise this exploit works(Location
should not point to your disk)
If your clients run WinXP with SP2 they will be not affected if it passes
trough ISA.
Regards David Farinic
________________________________________
From: Ray Dzek [mailto:rdzek@xxxxxxxxxxxxxxx]
Sent: Thursday, 20 May 2004 5:38 p.m.
To: [ISAserver.org Discussion List]
Subject: [isalist] Re: GFI Download Security
http://www.ISAserver.org
Thanks,
I seriously think this is something worth looking into. It is probably our
#1 or #2 issue right now. It can take up to a few hours to clean a system
from all the crap these (*&#$@(*& install. It is extremely prevelent on
home PC's along with all the spyware. I am also working with the local
school district to find a solution for their systems as well. They are
having a hell of a time keeping their machines clean.
Ray Dzek
Network Operations Supervisor
Specialized Bicycle Components
-----Original Message-----
From: Thomas W Shinder [mailto:tshinder@xxxxxxxxxxx]
Sent: Wednesday, May 19, 2004 4:36 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] Re: GFI Download Security
http://www.ISAserver.org
Hi Ray,
That's a good question. I haven't researched yet what methods are used to
installed scumware on user's computers. I'm sure a variety of methods are
used. I plan to do this if/when I update the application layer filtering kit
to version ISA 2004. I sure its as easy as blocking extensions and content
types, but the devil is always in the details.
Tom
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