[DSE-Dev] Re: Fixing up SELinux reference policy for Debian
srivasta at debian.org
Sat May 12 01:53:47 UTC 2007
I have just uploaded a version of refpolicy that has a number of
Debian specific SELinux policy changes. I can now do and aptitude
update, and aptitude upgrade while running strict policy in enforcing
mode in my UML machine. The createfs.sh script now incorporates all
the recommended changes on http://wiki.debian.org/SELinux/Setup, so it
is relatively easy to create such a UML.
I also have a patch for sysvinit's /etc/network/if-up.d/mountnfs
to provide the context when creating /var/run/network/mountnft; if and
only if we are running selinux. I'll send in a wishlist bug report
My local policy file has been reduced to a single allow rule,
and a bout half a dozen dontaudit rules; and is now shipped with the
strict policy package as an example.
The single allow rule that I still need is due to Bug#390067, I
have not yet had a chance to create a helper script that would do the
logging, and which can be put into a different security domain.
However, a more basic problem exists: as an ordinary user, I
can't run dpkg-checkbuilddeps, or do anything that needs looking at
/var/lib/dpkg -- since plain old users can't look into /var.
I think we need to create debian specific policy changes to
allow searching /var, /var/lib. and /var/lib/dpkg. We also read file
permissions on files in /var/lib/dpkg; and these need to be added to a
Any objections? (I don't think I want to create a whole
different class of user for this capability). This would be the
minimal requirements to start building my Debian packages in enforcing
After that, I need to start branching out, and adding, say,
apache2 servers to my UML, and checking validity of strict policy.
Given the magnitude of these changes, I am planning on trying to
do a backport of SELinux packages for Etch, at least, for the current
release, before the kernel requirements diverge too much.
No use getting too involved in life -- you're only here for a limited
Manoj Srivastava <srivasta at debian.org> <http://www.debian.org/~srivasta/>
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