full-disclosure - Re: Recent claims that windows update is broken

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Date: Sat, 10 Sep 2011 10:05:37 +0300
From: Georgi Guninski <guninski@...inski.com>
To: Dan Kaminsky <dan@...para.com>
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: Recent claims that windows update is broken

On Fri, Sep 09, 2011 at 03:09:25PM -0700, Dan Kaminsky wrote:
> On Thu, Sep 8, 2011 at 2:55 AM, Georgi Guninski <guninski@...inski.com>wrote:
> 
> > http://www.theregister.co.uk/2011/09/07/diginotar_hacker_proof/
> > "I'm able to issue windows update," he [Comodohacker] wrote. "Microsoft's
> > statement about Windows Update and that I can't issue such update is totally
> > false!"
> >
> > The original Comodohacker statement is at: http://pastebin.com/85WV10EL
> >
> > Is this true?
> >
> 
> For the record, no.  Windows Update doesn't just depend on WinVerifyTrust,
> it also calls CertVerifyCertificateChainPolicy with
> the CERT_CHAIN_POLICY_MICROSOFT_ROOT flag, documented here:
> 
> http://msdn.microsoft.com/en-us/library/aa377163(v=vs.85).aspx
> 
> 
>

By your logic there would be no exploits just because the documentation writes so.

I bothered to ask mainly for these reasons:

1. It is unclear to me what collection of private keys/certs Comodohacker has
2. From thereg article:
>Microsoft declined to comment.

-- 
georgi

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