[Dailydave] Dangling pointers exploitation

[Pusscat]

Didn't halvar give a memory painting talk on exploiting this kind of
uninitialized/"dangling" variable bug?

~ Puss


-----Original Message-----
From: dailydave-bounces at lists.immunitysec.com
[mailto:dailydave-bounces at lists.immunitysec.com] On Behalf Of Thomas Ptacek
Sent: Wednesday, July 25, 2007 1:03 PM
To: jf
Cc: dailydave at lists.immunitysec.com
Subject: Re: [Dailydave] Dangling pointers exploitation

Unitialized automatic variables and use-after-free variables seem
of-a-kind: you have a pointer who's value seems unpredictable but is
in fact strongly influenced by the execution environment which is in
turn often influenced by inputs and timing.

On 7/25/07, jf <jf at danglingpointers.net> wrote:
> > Let me just qualify that I was talking about the whole class of
> > wild-pointer bugs.
>
> how would it be any different than
> ptr+overflowed_offset/array[negative_index]/et cetera bugs?
>
> perhaps the guys found a new way of reliably exploiting a very specific
> form of dangling pointer bugs, but i dont see how it could possibly
> qualify as being a new class of vulns, nor can i think of anyone who has
> ever said a dangling pointer was a QA issue and not a security issue
>


-- 
---
Thomas H. Ptacek // matasano security
read us on the web: http://www.matasano.com/log
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