Domain transition missing

[Dominick Grift]

On Sat, 2009-07-04 at 05:44 -0700, Vadym Chepkov wrote:
> Thank you
> 
> Every single daemon out there was choking, just a few:
> 
> type=AVC msg=audit(1246707387.606:8922): avc:  denied  { connectto } for  pid=1313 comm="dovecot-auth" path="/var/run/winbindd/pipe" scontext=unconfined_u:system_r:dovecot_auth_t:s0 tcontext=system_u:system_r:system_cronjob_t:s0 tclass=unix_stream_socket
> type=AVC msg=audit(1246707463.608:8931): avc:  denied  { connectto } for  pid=6828 comm="sendmail" path="/var/run/winbindd/pipe" scontext=unconfined_u:system_r:sendmail_t:s0 tcontext=system_u:system_r:system_cronjob_t:s0 tclass=unix_stream_socket
> type=AVC msg=audit(1246707468.105:8932): avc:  denied  { connectto } for  pid=6841 comm="procmail" path="/var/run/winbindd/pipe" scontext=unconfined_u:system_r:procmail_t:s0 tcontext=system_u:system_r:system_cronjob_t:s0 tclass=unix_stream_socket
> type=AVC msg=audit(1246707508.622:8935): avc:  denied  { connectto } for  pid=6847 comm="sendmail" path="/var/run/winbindd/pipe" scontext=unconfined_u:system_r:sendmail_t:s0 tcontext=system_u:system_r:system_cronjob_t:s0 tclass=unix_stream_socket
> type=AVC msg=audit(1246707508.629:8936): avc:  denied  { connectto } for  pid=6851 comm="dbus-daemon-lau" path="/var/run/winbindd/pipe" scontext=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 tcontext=system_u:system_r:system_cronjob_t:s0 tclass=unix_stream_socket
> type=AVC msg=audit(1246707632.720:8963): avc:  denied  { connectto } for  pid=7855 comm="pop3" path="/var/run/winbindd/pipe" scontext=unconfined_u:system_r:dovecot_t:s0 tcontext=system_u:system_r:system_cronjob_t:s0 tclass=unix_stream_socket
> type=AVC msg=audit(1246707632.732:8964): avc:  denied  { connectto } for  pid=7857 comm="dbus-daemon-lau" path="/var/run/winbindd/pipe" scontext=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 tcontext=system_u:system_r:system_cronjob_t:s0 tclass=unix_stream_socket
> 
> Sincerely yours,
>   Vadym Chepkov
> 

You need to run winbind in the winbind_t domain.

1. create a policy for your cronjob script.
2. make it so that system_cronjob_t transitions to the domain of your
cronjob script.
3. make your cronjob script domain auto transition to winbind_t

It is not so simple to make his work properly the way cron is currently
configured in SELinux.

I can help you make a policy though but i would need some info

1. where is the cron script located (/path/name)
2. whats ur distro
3. what is the type of winbind executable? ls -alZ /path/to/winbind

Here is an example for a backup cron script i made earlier:

http://desktop1/~dgrift/stuff/modules/backupdgrift.te
http://desktop1/~dgrift/stuff/modules/backupdgrift.if
http://desktop1/~dgrift/stuff/modules/backupdgrift.fc


> --- On Sat, 7/4/09, Dominick Grift <domg472 at gmail.com> wrote:
> 
> > From: Dominick Grift <domg472 at gmail.com>
> > Subject: Re: Domain transition missing
> > To: "Vadym Chepkov" <chepkov at yahoo.com>
> > Cc: "Fedora SELinux" <fedora-selinux-list at redhat.com>
> > Date: Saturday, July 4, 2009, 8:38 AM
> > On Sat, 2009-07-04 at 05:11 -0700,
> > Vadym Chepkov wrote:
> > > Hi,
> > > 
> > > Last night I got a nasty surprise from selinux. I am
> > using winbind for external authentication and since it has
> > history of failures I have a simple watchdog implemented to
> > check the status and restart it if necessary. That is 
> > what happened last night and as a law abiding selinux
> > citizen I used 'service winbind restart', but it seems the
> > proper domain transitions is missing and winbind was started
> > in system_cronjob_t domain instead of winbind_t and none of
> > other domains could connect to it.
> > > 
> > > I think jobs running from cron should be granted the
> > same transition rules as  from unconfined_t. 
> > > 
> > > I will file bugzilla report about it, but could
> > somebody help me with modifying my local policy until/if it
> > gets implemented, please? Thank you.
> > > 
> > > Sincerely yours,
> > >   Vadym Chepkov
> > 
> > A domain transition would be:
> > 
> > policy_module(mywinbind, 0.0.1)
> > 
> > require { type system_cronjob_t, winbind_exec_t, winbind_t;
> > }
> > domain_auto_trans(system_cronjob_t, winbind_exec_t,
> > winbind_t)
> > 
> > Can you show us the full raw avc denial?
> > 
> > > --
> > > fedora-selinux-list mailing list
> > > fedora-selinux-list at redhat.com
> > > https://www.redhat.com/mailman/listinfo/fedora-selinux-list
> > 
> >