Temporary Fix for IE Zero Day Malware RE: BAD NEWS: Microsoft Security Bulletin MS03-032
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Hash: SHA1
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\MIME\Database\Content Type\application/hta
Changing this makes one immune. If you change this to application/htaOLD, then
someone has to use application/htaOLD on you. I would suggest a very long
random number/character combination or deletion. As for deletion, the contents
are entirely standard and may be brought back easily.
Deletion is the safest avenue.
Our Network Admin asked:
"Will that fully disable execution of html apps (with the
extension .hta)?"
Some network administrators use documents with the .hta extension. Beyond this
field, I don't think anyone uses it. Regardless, yes, you may still use hta
files -- just they must be identified by having a proper extension. They may
not be identified by MIME Type as the bug depends on.
In the vast majority of instances you will find that even with HTA files being
transferred over the network, they will not depend or even use the MIME type.
There may be as yet undiscovered variants of this issue which I am unaware of
at this time. This fix may not protect against these variants. But, this fix
does protect against this variant, so I suggest people use it.
> -----Original Message-----
> From: http-equiv@xxxxxxxxxx [mailto:1@xxxxxxxxxxx]
> Sent: Saturday, September 06, 2003 4:20 PM
> To: secure@xxxxxxxxxxxxx
> Cc: Russ.Cooper@xxxxxxxxxxxx; dcopley@xxxxxxxx
> Subject: BAD NEWS: Microsoft Security Bulletin MS03-032
>
>
>
>
> Bad news.
>
> Your patch from Drew's object data=funky.hta doesn't work:
>
http://www.malware.com/badnews.html
<script>
var oPopup = window.createPopup();
function showPopup() {
oPopup.document.body.innerHTML = "<object data=ouch.php>";
oPopup.show(0,0,1,1,document.body);
}
showPopup()
</script>
- --
http://www.malware.com
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