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Date:      Thu, 1 Feb 2001 15:18:26 -0500
From:      Will Andrews <will@physics.purdue.edu>
To:        Paul Andrews <andrews@powersurfr.com>
Cc:        security@FreeBSD.ORG
Subject:   Re: FreeBSD Ports Security Advisory: FreeBSD-SA-01:07.xfree86
Message-ID:  <20010201151826.C479@puck.firepipe.net>
In-Reply-To: <005301c08c89$33722260$b13e6c18@videon.ca>; from andrews@powersurfr.com on Thu, Feb 01, 2001 at 12:57:26PM -0700
References:  <200101300909.f0U99qv87528@freefall.freebsd.org> <005301c08c89$33722260$b13e6c18@videon.ca>

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On Thu, Feb 01, 2001 at 12:57:26PM -0700, Paul Andrews wrote:
> Does this issue affect only those that installed the XFree86 3.3.6 port or
> does it also affect those who have installed FreeBSD 4.2 RELEASE.

FreeBSD !=3D XFree86.  The advisory specifies what is vulnerable.

> If it does affect the RELEASE version what is the easiest why to fix this
> problem, without upgrading to XFree86 4.01.

If you have no users, just firewall off your X sockets (or tell X to turn
them off).  If you have users, just make sure they can't run anything
setuid linked to libX11.  8)

For other fixes, see below (as specified in the advisory):

> > 1) Upgrade your entire ports collection and rebuild the XFree86-3.3.6
> > port.
> >
> > 2) Deinstall the old package and install an XFree86-4.0.2 package
> > obtained from:
> >
> > [i386]
> >
> ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/x11/XFree8=
6-4
> .0.2_5.tgz
> >
> ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/x11/XFree8=
6-4
> .0.2_5.tgz
> >
> ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/x11/XFree=
86-
> 4.0.2_5.tgz
> >
> > [alpha]
> > Packages are not automatically generated for the alpha architecture at
> > this time due to lack of build resources.
> >
> > NOTE: XFree86-3.3.6 packages are no longer made available, only the
> > newer XFree86-4.0.2 packages.
> >
> > Note also that the XFree86-aoutlibs port has not yet been fixed: there
> > is currently no solution to the problem other than removing the
> > port/package and recompiling any dependent software to use ELF
> > libraries, or switching to an ELF-based version of the software, if
> > available (e.g. the BSD/OS or Linux versions of Netscape, as an
> > alternative to the FreeBSD native version).  The potential impact of
> > the vulnerabilities to the local environment may be deemed not
> > sufficiently great to warrant this approach, however.
> >
> > 3) download a new port skeleton for the XFree86-3.3.6 port from:
> >
> > http://www.freebsd.org/ports/
> >
> > and use it to rebuild the port.
> >
> > 4) Use the portcheckout utility to automate option (3) above. The
> > portcheckout port is available in /usr/ports/devel/portcheckout or the
> > package can be obtained from:
> >
> >
> ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/devel/port=
che
> ckout-2.0.tgz
> >
> ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/devel/port=
che
> ckout-2.0.tgz
> >
> ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/devel/por=
tch
> eckout-2.0.tgz
> >
> ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/devel/por=
tch
> eckout-2.0.tgz
> >
> ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/devel/po=
rtc
> heckout-2.0.tgz

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wca

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