Stephen Smalley wrote:
On Thu, 2007-04-26 at 20:00 -0500, Joe Nall wrote:
On Apr 26, 2007, at 3:18 PM, Stephen Smalley wrote:
On Thu, 2007-04-26 at 14:55 -0500, Joe Nall wrote:
I'm running an mls/permissive policy on FC6 and service and system-
config-services start daemons in the user's selinux context rather
than those in /etc/selinux/mls/contexts/initrc_context. Since our
policies use init_daemon_domain to establish domain transitions, they
are not transitioning into the correct domain on user initiated (re)
starts.
"run_init service <service> restart" - works, but leaves us in a
situation where documentation doesn't match experience. What is the
right approach to getting the transitions to work properly? Patch
service and friends? Write a more generic transition?
That should be governed by the DIRECT_INITRC= setting in the refpolicy
build.conf (or as overridden on the make command line in the .spec
file
for building the policy). DIRECT_INITRC=y (as in -targeted) turns on
direct role transitions and domain transitions from
sysadm_r:sysadm_t to
system_r:initrc_t and/or system_r:<daemon domain>, although we
can't yet
automatically transition the user identity field.
If you want the DIRECT_INITRC=n situation, then yes, you need to
integrate run_init or similar functionality into the init script
and/or
service script infrastructure, as they have done in Hardened Gentoo.
Why does run_init prompt for a root password rather than perform a
role check?
The role authorization is handled transparently by policy - if you
weren't in an authorized role/domain, then you couldn't use run_init to
transition to system_r:initrc_t anyway. Same as with newrole. The
re-authentication stage is purely a (weak) countermeasure against
invocation by malicious code without user consent - if we had a trusted
path mechanism in Linux, we'd use that instead.
Most people are adding pam_rootok to /etc/pam.d/run_init so that it will
work for sysadm_t.
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