SELinux constrain policy for escalated root user

[Dominick Grift]

On Tue, 2013-09-03 at 06:28 +0000, Anamitra Dutta Majumdar (anmajumd)
wrote:
> We need to constrain a tomcat escalated root user from executing "useradd" and "semanage" commands on RHEL6.
> 
> Can we add a SELinux constraint policy to achieve  the same?
> 
> A tomcat escalated root user (I.e when a "tomcat" user escalates to the "root" user on the system)
>  has the following security context
> 
> uid=0(root) gid=0(root)
>   groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel)
> context=system_u:system_r:tomcatd_t:SystemLow-SystemHigh
> 
> The logic of this constraint should be be as follows..
> 
> If id="root" and source type="tomcatd_t"
> 
>    Then disallow domain transition to both "useradd_exec_t" as well as "semanage_exec_t"
> 
> 1. Is this something doable through an SELinux constrain policy.
> 2. If so what should be the syntax of the policy.
> --

I do not believe you can use traditional Linux security identifiers
(uid/gid) in policy constrain statements

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