Re: problem with capabilities inheritance and auditing in python

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On Thu, Feb 5, 2009 at 12:10 PM, Stephen Smalley <sds@xxxxxxxxxxxxx> wrote:
> On Thu, 2009-02-05 at 11:08 -0600, Xavier Toth wrote:
>> I've set the capabilities on a script that runs some python code with
>> auditing calls in it but I'm not getting audit records written to the
>> audit log. From what I've read I thought the +i would all the
>> capability to be inherited across execve but this doesn't appear to be
>> the case. Can anyone help me understand what's going wrong here? Is
>> there a way in the python code to get the capabilities to see if
>> indeed cap_audit_write was inherited?
>
> Linux doesn't honor setuid on scripts, and file capabilities are
> supposed to have the same behavior (they didn't for a while due to an
> oversight, but that was corrected).  You need an executable wrapper
> program that invokes the script, like:
> http://oss.tresys.com/projects/clip/browser/trunk/RHEL5.2/scripts/wrappers/wrapper.c
>
> --
> Stephen Smalley
> National Security Agency
>
>

Having used this wrapper code pretty much as is I'm now seeing
self:capability dac_override and dac_read_search AVCs. Do I need to do
something similar to what newrole does to drop capabilities that I
don't need my python script to have after all I'm only trying to give
it the ability to audit?

Ted

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