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Message-ID: <20110812110504.GA4115@albatros>
Date: Fri, 12 Aug 2011 15:05:04 +0400
From: Vasiliy Kulikov <segoon@...nwall.com>
To: kernel-hardening@...ts.openwall.com
Subject: Re: [RFC] x86, mm: start mmap allocation for
libs from low addresses
On Fri, Aug 12, 2011 at 14:58 +0400, Solar Designer wrote:
> On Fri, Aug 12, 2011 at 02:29:54PM +0400, Vasiliy Kulikov wrote:
> > As a
> > result, it makes it impossible to change the return address on the stack
> > to the address of some library function (e.g. system(3)).
>
> JFYI, this statement is too strong.
[...]
You're right. I was thinking about a single overflow for ret2lib with
1+ argument(s). In general, my statement is wrong, sure.
Thank you!
--
Vasiliy
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