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Date: Thu, 25 Sep 2014 19:43:09 -0400
From: Chet Ramey <chet.ramey@...e.edu>
To: Simon McVittie <smcv@...ian.org>, oss-security@...ts.openwall.com
CC: chet.ramey@...e.edu
Subject: Re: CVE-2014-6271: remote code execution through bash
On 9/25/14, 12:20 PM, Simon McVittie wrote:
> On 25/09/14 16:59, John Haxby wrote:
>> There are lots of things one could do to eliminate that risk, of course,
>> but step back and what are we arguing for?
>
> I'm arguing that privilege boundaries should take responsibility for
> their nature as a privilege boundary, and not pass the buck to the code
> that they call into.
It doesn't help if some process sets ruid = euid and execs bash, but bash
doesn't import functions from the environment if ruid != euid.
Chet
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU chet@...e.edu http://cnswww.cns.cwru.edu/~chet/
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