Re: sys_chroot+sys_fchdir Fix

[Alan Cox]

On Wed, 19 Sep 2007 09:19:50 +0200
majkls <majkls@xxxxxxxxxxx> wrote:

> Hello,
> here is an fix to an exploit (obtained somewhere in internet). This 
> exploit can workaround chroot with CAP_SYS_CHROOT. It is also possible 
> (with sufficient filedescriptor (if there is na directory fd opened in 
> root) workaround chroot with sys_fchdir. This patch fixes it.


If you have the ability to use chroot() you are root. If you are root you
can walk happily out of any chroot by a thousand other means.

Alan
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