HardenedBSD/sys/security/mac_biba
Olivier Certner 7974ca1cdb cr_canseejailproc(): New privilege, no direct check for UID 0
Use priv_check_cred() with a new privilege (PRIV_SEEJAILPROC) instead of
explicitly testing for UID 0 (the former has been the rule for almost 20
years).

As a consequence, cr_canseejailproc() now abides by the
'security.bsd.suser_enabled' sysctl and MAC policies.

Update the MAC policies Biba and LOMAC, and prison_priv_check() so that
they don't deny this privilege.  This preserves the existing behavior
(the 'root' user is not restricted, even when jailed, unless
'security.bsd.suser_enabled' is not 0) and is consistent with what is
done for the related policies/privileges (PRIV_SEEOTHERGIDS,
PRIV_SEEOTHERUIDS).

Reviewed by:            emaste (earlier version), mhorne
MFC after:              2 weeks
Sponsored by:           Kumacom SAS
Differential Revision:  https://reviews.freebsd.org/D40626
2023-09-28 11:42:22 -03:00
..
mac_biba.c cr_canseejailproc(): New privilege, no direct check for UID 0 2023-09-28 11:42:22 -03:00
mac_biba.h