Aw: Re: How to configure auditd to register like internal bash commands?

[Casey Schaufler]

On 2/8/2022 5:12 PM, André Letterer wrote:
> Yes, history is a bash internal command and that's why I opened initally this thread because I wanted to know if there is any chance to track internal bash commands like history as well via auditd. For now it seems pam_tty_audit doesn't do the job.

Audit tracks security relevant events. Invoking a built-in
command such as history, export or set does not involve any
security relevant events. Invoking a built-in simply sends the
existing shell process down a specified code path. There's no
audit record because there's nothing happening to audit.

> *Gesendet:* Mittwoch, 09. Februar 2022 um 02:09 Uhr
> *Von:* "Casey Schaufler" <casey at schaufler-ca.com>
> *An:* "André Letterer" <andre.letterer at web.de>, "Richard Guy Briggs" <rgb at redhat.com>
> *Cc:* Linux-audit at redhat.com
> *Betreff:* Re: How to configure auditd to register like internal bash commands?
> On 2/8/2022 4:24 PM, André Letterer wrote:
> > Yeah, it's a very good start.
> > However it seems it still doesn't do what I want.
> > It seems only changing the 2 files doesn't do the job:
> >           nano /etc/pam.d/system-auth
> >             session    required pam_tty_audit.so disable=* enable=logs log_passwd
> >           nano /etc/pam.d/password-auth
> >             session    required pam_tty_audit.so disable=* enable=logs log_passwd
> > I get much more entries in /var/log/audit/audit.log for user logs like for instance if I su to this one.
> > However unfortunately commands like "history -c" don't still trigger an entry...
>
> There are a significant number of commands that are shell built-ins,
> including "history".
>
> > Is there still a follow-up idea on this?
> > *Gesendet:* Mittwoch, 09. Februar 2022 um 00:20 Uhr
> > *Von:* "Richard Guy Briggs" <rgb at redhat.com>
> > *An:* "André Letterer" <andre.letterer at web.de>
> > *Cc:* Linux-audit at redhat.com
> > *Betreff:* Re: How to configure auditd to register like internal bash commands?
> > On 2022-02-07 23:37, André Letterer wrote:
> > > Hi folks,
> > >
> > > I would like to have some help on configuring auditd for very short
> > > running commands like
> > > unset ...
> > > set ...
> > > export ...
> > > history -c
> > >
> > > or similar commands.
> > > How would that be possible?
> > > Would you mind please to help me on some knowledge about that?
> >
> > You may want to look into pam_tty_audit, but it may flood your logs.
> >
> > - RGB
> >
> > --
> > Richard Guy Briggs <rgb at redhat.com>
> > Sr. S/W Engineer, Kernel Security, Base Operating Systems
> > Remote, Ottawa, Red Hat Canada
> > IRC: rgb, SunRaycer
> > Voice: +1.647.777.2635, Internal: (81) 32635
> >
> > --
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