Messages in this thread | | | Date | Wed, 19 Sep 2007 14:27:22 -0400 | From | Bill Davidsen <> | Subject | Re: sys_chroot+sys_fchdir Fix |
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Alan Cox wrote: > On Wed, 19 Sep 2007 09:19:50 +0200 > majkls <majkls@prepere.com> 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 <davidsen@tmr.com> "We have more to fear from the bungling of the incompetent than from the machinations of the wicked." - from Slashdot - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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