full-disclosure - Re: DLL hijacking with Autorun on a USB drive

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Date: Fri, 27 Aug 2010 07:20:22 -0400
From: Larry Seltzer <larry@...ryseltzer.com>
To: Dan Kaminsky <dan@...para.com>, Valdis.Kletnieks@...edu
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: DLL hijacking with Autorun on a USB drive

Clearly desktops need to be able to run arbitrary code. That’s what they’re
there for.

Why wouldn’t eliminating the CWD from the DLL search order fix the problem?
I asked Microsoft about this (
http://blogs.pcmag.com/securitywatch/2010/08/list_of_dll_vulnerability_wind.php)
and they said the obvious answer, that it would break too many customer
installations. And I guess it would break a bunch of them, but there really
isn’t a good reason for anyone to load a DLL from the CWD, is there?

I think they dropped the ball on this at Vista time. They made so many other
changes for security reasons then that forced users and developers to change
practice that this one wouldn’t have been such a big stink. And they’ve
known about the basic problem for 10 years (and should have known earlier,
since it was a UNIX attack beforehand).

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