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Re: Remote overflow in MSIE script action handlers (mshtml.dll)



This does not repro on IE7 though

-Hariharan

----- Original Message ----- From: "Michal Zalewski" <lcamtuf@xxxxxxxxxxxx>
To: "Daniel Bonekeeper" <thehazard@xxxxxxxxx>
Cc: <bugtraq@xxxxxxxxxxxxxxxxx>; <vulnwatch@xxxxxxxxxxxxx>; <full-disclosure@xxxxxxxxxxxxxxxxx>
Sent: Friday, March 17, 2006 2:43 AM
Subject: Re: Remote overflow in MSIE script action handlers (mshtml.dll)


On Thu, 16 Mar 2006, Daniel Bonekeeper wrote:

BTW, tested the POC on MSIE (File Version = 6.00.2900.2180
(xpsp_sp2_rtm.040803-2158)) with mshtml.dll (6.00.2900.2802
(xpsp_sp2_gdr.051123-1230)) and it didn't worked.

Daniel followed up with me in private and confirmed that the PoC *did*
work for him when he followed certain additional instructions: because the
attack depends on memory layout and usage, to get consistent results, be
sure to close *all* MSIE windows, then go to Start -> Run... and type:

 iexplore http://lcamtuf.coredump.cx/iedie.html

That should crash the browser immediately, because there are no other
buffers nearby to "absorb" the initial fencepost. Still, if no dice, try
hitting 'Reload' a couple of times.

/mz