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FreeBSD-SA-01:06                                           Security Advisory

                                                                FreeBSD, Inc.



Topic:          zope vulnerability allows escalation of privileges



Category:       ports

Module:         zope

Announced:      2001-01-15

Credits:        Erik Enge

Affects:        Ports collection prior to the correction date.

Corrected:      2000-12-20

Vendor status:  Patch released

FreeBSD only:   NO



I.   Background



zope is an object-based dynamic web application platform.



II.  Problem Description



The zope port, versions prior to 2.2.4, contains a vulnerability due

to the computation of local roles not climbing the correct hierarchy

of folders, sometimes granting local roles inappropriately.  This may

allow users with privileges in one folder to gain the same privileges

in another folder.



The zope port is not installed by default, nor is it "part of FreeBSD"

as such: it is part of the FreeBSD ports collection, which contains

nearly 4500 third-party applications in a ready-to-install format.

The ports collections shipped with FreeBSD 3.5.1 and 4.2 contain this

problem since it was discovered after the releases.



FreeBSD makes no claim about the security of these third-party

applications, although an effort is underway to provide a security

audit of the most security-critical ports.



III. Impact



Zope users with privileges in one folder may be able to gain the same

privileges in other folders.



If you have not chosen to install the zope port/package, then your

system is not vulnerable to this problem.



IV.  Workaround



Deinstall the zope port/package, if you have installed it.



V.   Solution



One of the following:



1) Upgrade your entire ports collection and rebuild the zope port.



2) Deinstall the old package and install a new package dated after the

correction date, obtained from:



http://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/www/zope-2.2.4.tgz

http://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/www/zope-2.2.4.tgz

http://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/www/zope-2.2.4.tgz

http://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/www/zope-2.2.4.tgz

http://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/www/zope-2.2.4.tgz



3) download a new port skeleton for the zope 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:



http://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/devel/portcheckout-2.0.tgz

http://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/devel/portcheckout-2.0.tgz

http://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/devel/portcheckout-2.0.tgz

http://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/devel/portcheckout-2.0.tgz

http://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/devel/portcheckout-2.0.tgz



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