full-disclosure - Re: Microsoft Windows default ZIP handler bug

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Message-ID: <4728388D.7010602@gmail.com>
Date: Wed, 31 Oct 2007 09:10:53 +0100
From: Nicolas RUFF <nicolas.ruff@...il.com>
To: Kristian Erik Hermansen <kristian.hermansen@...il.com>
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: Microsoft Windows default ZIP handler bug

> However, I put together a Flash video showing the bug.  It may not be
> exploitable, but I also haven't been keeping up with the latest bad
> pointer / alternate code path research stuff.  Maybe someone can do
> some ninjitsu code exec using this...
	
	Hello,

I had a quick look with SysInternals' ProcMon.

Given a B.ZIP file inside an A.ZIP file, the sequence is roughly the
following:

- User clicks on A.ZIP
- Explorer opens A.ZIP and extracts content into a temporary "A" directory
- User clicks on B.ZIP inside A.ZIP
- Explorer opens B.ZIP and extracts content into a temporary "B" directory
- Since A.ZIP is no longer referenced, temporary directory "A" is deleted
- User clicks "back"
- "A" directory not found, explorer closing

I feel you'll have a hard time trying to control EIP ;)

Regards,
- Nicolas RUFF

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