linux-kernel - Re: Chroot bug

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Message-ID: <46F92AAB.1060903@davidnewall.com>
Date:	Wed, 26 Sep 2007 01:05:07 +0930
From:	David Newall <david@...idnewall.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	"Serge E. Hallyn" <serge@...lyn.com>,
	Bill Davidsen <davidsen@....com>,
	Philipp Marek <philipp@...ek.priv.at>, 7eggert@....de,
	majkls <majkls@...pere.com>, bunk@...tum.de,
	linux-kernel@...r.kernel.org
Subject: Re: Chroot bug

Alan Cox wrote:
>> Marek's loading dynamic libraries, it seems clear that the prime purpose 
>> of chroot is to aid security.  Being able to cd your way out is handy 
>>     
>
> Does it - I can't find any evidence for that.

It seems self-evident to me.  What do you think is it prime purpose?

> A root user can get out of a chroot a million different ways

One of those ways shouldn't be that chroot lets you out.
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