AUDIT_NETFILTER_CFG event format

[Steve Grubb]

On Thursday, January 19, 2017 5:10:44 AM EST Richard Guy Briggs wrote:
> On 2017-01-17 10:42, Richard Guy Briggs wrote:
> > On 2017-01-17 09:07, Steve Grubb wrote:
> > > Hell Richard,
> > > 
> > > While we're in the NETFILTER area, the CFG event is lacking some fields,
> > > too. Its currently:
> > > 
> > > table,family,entries
> > > 
> > > its missing everything about *who* sent it:
> > > pid,uid,auid,ses,subj,exe,res
> > > 
> > > I'd suggest:
> > > 
> > > pid,uid,auid,ses,subj,table,family,entries,exe,res
> > > 
> > > to make it compatible with the majority of records.
> > 
> > Ok, I've created an issue to track this:
> > 	https://github.com/linux-audit/audit-kernel/issues/35
> 
> And I've just closed it since the associated SYSCALL setsockopt record
> lists all that information.

AUDIT_NETFILTER_CFG sometimes comes out of the kernel with no syscall record. 
Try this, 

ausearch --start today -m netfilter_cfg | less

You should see at least one that has no syscall record. This begs the question 
of why there is even a SYSCALL record? AUDIT_NETFILTER_CFG is not extra 
information that is gathered to help explain what the syscall means. Its a 
change to system configuration in its own right. It should not be attached to a 
syscall record - especially if its not consistent. It should be complete and 
stand on its own.

Thanks,
-Steve

> > > Incidentally, I created a
> > > chart that shows how each record type is alike and different from every
> > > other record. You might call it a record grammar tree:
> > > 
> > > http://people.redhat.com/sgrubb/audit/record-fields.html
> > > 
> > > I'd like to align as many events as possible to pid,uid,auid section of
> > > the
> > > graph.
> > > 
> > > -Steve
> > 
> > - RGB
> 
> - RGB
> 
> --
> Richard Guy Briggs <rgb at redhat.com>
> Kernel Security Engineering, Base Operating Systems, Red Hat
> Remote, Ottawa, Canada
> Voice: +1.647.777.2635, Internal: (81) 32635