I don't normally post alerts like these below where they state 
something NEEDED has to be disabled unless they are critical, 
and this one is.  Notice there is no M$ links regarding this 
issue.

Since many if not most 'big' sites use ActiveX, disabling it 
can cause problems at these sites, and since it's not a good 
idea to put any sites in your "Trusted zones" or sites except 
for maybe sites like your personal ban*king and related 
sites(1), those of you that are for some reason still not 
running *SpywareBlaster, *SpyBot (and others that block harmful 
ActiveX), REALLY NEED to INSTALL THEM now!  Also, many AV 
software programs will block bad ActiveX.

Most people have IE's "Privacy" setting area set to only 
"Medium" which is NOT good.  This will allow a lot of bad 
ActiveX (among many other things) to be placed on your PC. 
That area should be set to "High".  Yes, it's a pain with sites 
that insist on force-feeding you their #$%$@ Cookie even when 
it's not technically needed, but all you have to do is 
double-click that red "-" at lower right of the IE browser 
window (which denotes a blocked Cookie(s) and in the window 
that pops up double-click the MAIN URL, that's the MAIN URL 
ONLY, and dot the area to "Always allow this site to use 
Cookies" and IE will remember that.

An example of when you DO NOT need to do this is 
http://www.nasa.gov/ .  I just went there to check on the 
shuttle launch and you'll see that red "-" sign I mentioned 
above.  The site still functions without allowing it (but it 
may be needed for the Flash version).  Notice when you 
double-click that red "-" sign you see only ONE URL and it's 
theirs.  Now go to http://cnn.com/ for a good example of a site 
that tries to load all sorts of bad unnecessary garbage Cookies 
on your PC!  Now double-click that red "-" sign you'll see all 
sorts of BS!  I show SEVEN Cookies, and note how the last 5 of 
them are adware tracking Cookies!  (SpywareBlaster will block 
these).  If for example this was a site that demanded you 
needed to accept a Cookie for the site to function, or if it 
was a site where you had to order something, you would ONLY, 
that's ONLY accept the Cookie from the MAIN ROOT domain/URL!!

*SpywareBlaster & SpyBot are both free.
http://www.javacoolsoftware.com/spywareblaster.html
http://www.safer-networking.org/en/download/
Note that with all of these type programs, they MUST be setup 
CORRECTLY in order to block ALL of the bad things.  With 
SpywareBlaster you have to go to ALL of the areas, check the 
boxes, and click "Enable all protection".  With SpyBot, 
"TeaTimer" must be enabled (go to "Resident" under "Tools" and 
check BOTH boxes), and you have to go to the "Immunize" area 
and enable BOTH areas there so that both show the green check 
marks.

(1) Personally I don't even trust personal ban*king sites or 
ANY site for that matter because they too will try and load you 
up with garbage!  If you place one of those sites in the 
"Trusted sites" area, that means all ActiveX and bad Cookies 
could then be loaded on your PC without warning, (depending on 
the way you have the "Trusted sites" area setup).  This is 
under the "Security" tab in Internet Options for IE.
-Clint


TITLE:
Internet Explorer HTML Help ActiveX Control Memory Corruption

SECUNIA ADVISORY ID:
SA20906

VERIFY ADVISORY:
http://secunia.com/advisories/20906/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
Microsoft Internet Explorer 6.x
http://secunia.com/product/11/

DESCRIPTION:
A vulnerability in Internet Explorer, which potentially can be 
exploited by malicious people to compromise a user's system.

The vulnerability is caused due to an error in the HTML Help 
ActiveX control (hhctrl.ocx) when handling the "Image" 
property. This can be exploited to cause a memory corruption by 
setting an overly long string multiple times for the property.

Successful exploitation may allow execution of arbitrary code.

The vulnerability has been confirmed on a fully patched system 
running Windows XP SP2 with Internet Explorer 6.0. Other 
versions may also be affected.

SOLUTION:
Disable the "Run ActiveX controls and plug-ins" setting for all 
but trusted sites.

ORIGINAL ADVISORY:
http://browserfun.blogspot.com/2006/07/mobb-2-internethhctrl-image-property.html
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