Alan Cox wrote:
On Wed, 19 Sep 2007 09:19:50 +0200
majkls <[email protected]> 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.
I thought this was to prevent breaking out of chroot as a normal user.
ie. chroot /var/myjail /bin/su - guest
or similar.
--
Bill Davidsen <[email protected]>
"We have more to fear from the bungling of the incompetent than from
the machinations of the wicked." - from Slashdot
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