full-disclosure - Re: Can CERT VU#786920 be right?

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Date: Wed, 18 Jul 2007 09:57:55 -0400 (EDT)
From: "Steven Adair" <steven@...urityzone.org>
To: "Paul Szabo" <psz@...hs.usyd.edu.au>
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: Can CERT VU#786920 be right?

Did they fix this already because all I see when I go to your URL is:

II. Solution
We are currently unaware of a practical solution to this problem.

Unregister the AIM protocols

Disabling the AIM protocol handler may mitigate this vulnerability. To
unregister the protocol handlers, delete or rename the following registry
keys:

HKEY_CLASSES_ROOT\AIM

Block access to aim: URIs

Administrators may partially mitigate this vulnerability by blocking
access to the aim: URI using proxy server access control lists or the
appropriate content filtering rule.

Nothing about the "aol:".

Steven

> I sent the following to CERT (a few hours ago, no reply yet):
>
>> In http://www.kb.cert.org/vuls/id/786920 you wrote:
>>
>>   Disabling the AIM protocol handler will mitigate this vulnerability.
>>   To unregister the protocol handlers, delete or rename the following
>>   registry keys:
>>   HKEY_CLASSES_ROOT\AOL
>>
>> I believe that renaming that key does NOT unregister the handler.
>> Windows looks for registry values of "URL Protocol" (almost?) anywhere
>> within the registry, not just (directly) under HKCR. And anyway, how
>> would renaming AOL to XYZ affect the AIM handler...
>
> Now I wonder if they can in fact be right... please enlighten me.
>
> Cheers,
>
> Paul Szabo   psz@...hs.usyd.edu.au   http://www.maths.usyd.edu.au/u/psz/
> School of Mathematics and Statistics   University of Sydney    Australia
>
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