Re: Chroot bug

[David Newall <david@davidnewall.com>]

Jan Engelhardt wrote:
> On Sep 26 2007 01:11, David Newall wrote:
>   
> > Jan Engelhardt wrote:
> >     
> > > On Sep 26 2007 00:40, David Newall wrote:
> > >   
> > >       
> > > > Miloslav Semler pointed out that a root process can chdir("..") out of its
> > > > chroot.
> > > >         
> > > So what? Just do this: chdir into the root after chroot.
> > >       
> > I don't think so.  His exploit just got me all the way out of a chroot within a
> > chroot within a chroot, inclusive of lots of chdirs.
> >     
>
> Close all fds that point to directories outside the root ;-)
>   

Nope, still gets out.
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