bugtraq - RE: [ok] RE: Unchecked buffer in mstask.dll

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Message-ID: <002e01c46b6b$36116980$3c2ea8c0@LUFKIN.DPSOL.COM>
Date: Fri, 16 Jul 2004 14:29:27 -0500
From: "Curt Purdy" <purdy@...man.com>
To: <bugtraq@...urityfocus.com>, <full-disclosure@...ts.netsys.com>,
   <tlarholm@...x.com>, <brett.moore@...urity-assessment.com>
Subject: RE: [ok] RE: Unchecked buffer in mstask.dll


Dmitry Yu wrote:
> > Being curious, on Win2k, I copied cmd.exe (from
> winnt\system32) as xyz.pif;
> > then (right-click) Properties, Program crashes explorer. Is
> this related to
> > IconHandler, and is it exploitable?
>
> 	Disassembly window shows that there was an attempt to read dword
> at [EAX] (EAX=0).  So at first glance this doesn't seem to be
> trivially
> exploitable, but I'm not a win32 expert, and intuition
> suggests that there
> must be a way.

One possible exploit is to simply place the file on your desktop.
explorer.exe goes to 100% cpu.

Curt Purdy CISSP, GSEC, MCSE+I, CNE, CCDA
Information Security Engineer
DP Solutions

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If you spend more on coffee than on IT security, you will be hacked.
What's more, you deserve to be hacked.
-- former White House cybersecurity adviser Richard Clarke

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