full-disclosure - Re: Microsoft Windows vulnerability in TCP/IP Could Allow Remote Code Execution (2588516)

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Message-ID: <20111109151656.GA473@agathon.enslaved.lan>
Date: Wed, 9 Nov 2011 16:16:56 +0100
From: GomoR <gomor-fd@...or.org>
To: full-disclosure@...ts.grok.org.uk
Subject: Re: Microsoft Windows vulnerability in TCP/IP
	Could Allow Remote Code Execution (2588516)

On Wed, Nov 09, 2011 at 06:45:59AM -0500, Dan Rosenberg wrote:
[..]
> While I'd love to see an exploit from a purely academic perspective,
> it doesn't appear that this is the type of bug where exploitation is
> going to be reliable enough to support a worm.  The reference counter
> in question is most likely 32 bits, but even giving the benefit of the
> doubt and saying it's a 16-bit refcount, that's still 2^16 events
> (probably receiving a certain UDP packet) that need to be triggered
> precisely in order to cause a refcount overflow and then trigger a
> remote kernel use-after-free condition, which wouldn't be trivial to
> exploit even by itself.  On an unreliable network like the Internet,
> it seems unlikely that the kind of traffic volume required to trigger
> this bug could be generated without dropping a single packet.
> Reliable DoS seems more likely though.

I would love to hear about results running this exploit/PoC/whatever 
against a xBSD TCP/IP stack.

Microsoft Windows TCP/IP stack looks so BSDish to me since Windows Vista.

But that's probably because they "rewrote" it completely at that 
time (with integration of their "new" IPv6 stack also).

Joke: "Chuck Norris can exploit sockets that aren't even listening."

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