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Date:      Mon, 9 May 2011 10:49:47 -0400
From:      Jason Hellenthal <jhell@DataIX.net>
To:        Dag-Erling =?iso-8859-1?Q?Sm=F8rgrav?= <des@des.no>
Cc:        Jamie Landeg Jones <jamie@bishopston.net>, freebsd-security@freebsd.org, feld@feld.me, Edho P Arief <edhoprima@gmail.com>, utisoft@gmail.com
Subject:   Re: Rooting FreeBSD , Privilege Escalation using Jails (P??????tur)
Message-ID:  <20110509144947.GB77054@DataIX.net>
In-Reply-To: <86zkmwdpdl.fsf@ds4.des.no>
References:  <op.vu2g4b0k34t2sn@tech304> <BANLkTikJgPt4SM_B_7drpgFvO8RkvXaOtw@mail.gmail.com> <201105072231.p47MVktY035491@catflap.bishopston.net> <BANLkTikgnqXB4pdvCd9j9n7pFvg=n5FrdQ@mail.gmail.com> <20110508075203.GA61754@DataIX.net> <BANLkTi=8by=rtbNUDtA8CRSMJsmgPOR2XA@mail.gmail.com> <20110508173931.GA2757@DataIX.net> <86fwoof8lj.fsf@ds4.des.no> <BANLkTi=-0=L0MmezOCa=tiv6DrwHYZ83AQ@mail.gmail.com> <86zkmwdpdl.fsf@ds4.des.no>

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Dag-Erling,

On Mon, May 09, 2011 at 02:34:14PM +0200, Dag-Erling Sm=F8rgrav wrote:
> Chris Rees <utisoft@gmail.com> writes:
> > This is the point I'm making, I can't recommend in the docs that one
> > chmods $D/.. because we (the docs writers) don't know what the user
> > (the reader) is going to set $D to.
>=20
> Ah, OK.  But you could provide an example where $D is /var/jail, or
> something along those lines.
>=20

Do you know if there is a way that chmod on / from within the jail could=20
be prevented easily without breaking something ? Maybe not failing but=20
falling though and return 0 for any operation with the sole argument of /.

--=20

 Regards, (jhell)
 Jason Hellenthal


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