full-disclosure - Re: [FD] the other bash RCEs (CVE-2014-6277 and CVE-2014-6278)

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Message-ID: <CAGuiMHgiK9C=S9=c0VJAqTT0X3PYkA1dys_q6WbH5e54EaasBA@mail.gmail.com>
Date: Sat, 4 Oct 2014 03:48:52 -0400
From: Michael Bazzinotti <mbazzinotti@...il.com>
To: fulldisclosure@...lists.org
Subject: Re: [FD] the other bash RCEs (CVE-2014-6277 and CVE-2014-6278)

In reference to Michal Zalewski's detailed post:
>Perhaps notably, the ability to specify attacker-controlled addresses
>hinges on the state of --enable-bash-malloc and --enable-mem-scramble

The correct ./configure argument for bash-malloc is --with-bash-malloc.
Just wanted to note that out. I learned this from going to compile bash
myself with these flags just now. :)

>compile-time flags; if both are enabled, the memory returned by
>xmalloc() will be initialized to 0xdf, making the prospect of
>exploitation more speculative (essentially depending on whether the
>stack or any other memory region can be grown to overlap with
>0xdfdfdfdf)

Cheers,
-- 
*****************************
Michael Bazzinotti
University of Massachusetts Boston
bazz@...umb.edu
http://www.bazz1.com

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