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Re: Apple Safari 4 Beta feeds: URI NULL Pointer Dereference Denial of, Service Vulnerability
From: neeko () feelingsinister net
Date: Thu, 26 Feb 2009 20:01:09 -0800


On Fri, Feb 27, 2009 at 01:22:36PM +1100, Jubei Trippataka wrote:
On Fri, Feb 27, 2009 at 12:26 PM, <neeko () feelingsinister net> wrote:

BM_X-Force_WP_final.pdf is called "Application-Specific Attacks:
Leveraging the ActionScript Virtual Machine" and if you haven't read it,
you should. It'll make you smile.



OK, and what about this vulnerability makes use of a NULL pointer? This goes

See this --------------------------------------------------^

to show the shallow exploitation knowledge of this community. If you
actually understood the paper it's (NULL + offset). This is NOT the same as

and then this -------------------------^

a plain NULL deref bug. Also, you need to be able to map the NULL address,
so I ask again, in examples such as this, in users-space apps name one
exploitable condition.


-- 
ciao

JT

I'll clarify for everyone since you seem lost.
EVERYONE, THE NULL POINTER DOES NOT GET DEREFERENCED. It only 
gets referenced. And Jubei isn't even sure a null pointer is involved 
at all =)

With that out of the way, I'd just like to say that I only meant to 
encourage people to check out an excellent paper. I didn't mean to say 
anything related to your argument other than to say that that 
paper is a must-read. If you can't appreciate that, why the fuck are you 
on F-D? Think about it.

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