Re: Policies rules generated using "audit2allow -R" questions (risks)

"Large legacy application."

I'm running for the nearest exit and getting off the property already.


On July 23, 2021 8:49:25 AM AKDT, Todd Sandor <[email protected]> wrote:
>I'm a selinux newbie using RHEL7.9 and I'm in the process of creating
>a "private/application" selinux policy for a
>large legacy application.
>
>For some AVCs/denials I've been using the audit2allow to generate some
>of the rules/interfaces to resolve the AVCs/denials.
>
>Questions about using the "-R" option to generate the policy rules:
>
>1. What are the risks of using the "-R" option?
>Do people use the "interfaces" which the "-R" generates in the
>policies deployed in production environments?
>When "-R" is used, how does the tool itself determine which
>"interface" to use?   Is it Linux distribution and release specific so
>if we upgrade will it be a problem?
>
>The redhat documentation and man page (and other vendor's
>documentation) specify it is a risk to use this tool (see [1][2]).
>
>2. When the "-R" option is not used, separate rules are generated that
>do not include "interface" rules.
>Is it safe to use the rules audit2allow generates (without "-R") or
>are those a risk as well?
>
>3. Any other suggestions for resolving AVCs/denials ?
>
>[1]
>https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html-single/selinux_users_and_administrators_guide/index#sect-Security-Enhanced_Linux-Fixing_Problems-Allowing_Access_audit2allow
>
>[2] audit2allow man page
>man audit2allow
>...
>       -R | --reference
>              Generate reference policy using installed macros.  This
>attempts to match denials  against  interfaces  and  may  be
>              inaccurate.
>
>Thanks

-- 
Sent from my Android device with K-9 Mail. Please excuse my brevity.

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