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

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Date: Fri, 17 Mar 2006 10:41:12 +1300
From: "Jamie Riden" <jamie.riden@...il.com>
To: "Michal Zalewski" <lcamtuf@...ne.ids.pl>
Cc: bugtraq@...urityfocus.com
Subject: Re: Remote overflow in MSIE script action handlers (mshtml.dll)


Confirmed on XP SP2, latest greatest, etc.

"Unhandled exception at 0x7dcfa61d in iexplore.exe: 0xC0000005: Access
violation writing location 0x002911d8."

I had to shut all (Windows) explorer and Internet Explorer windows first though.

cheers,
 Jamie

On 17/03/06, Michal Zalewski <lcamtuf@...ne.ids.pl> wrote:
> 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
>