Security-Enhanced Linux secures the getty processes via flexible mandatory access control.
If you want to allow users to resolve user passwd entries directly from ldap rather then using a sssd serve for the getty_t, you must turn on the authlogin_nsswitch_use_ldap boolean.
setsebool -P authlogin_nsswitch_use_ldap 1
If you want to allow confined applications to run with kerberos for the getty_t, you must turn on the kerberos_enabled boolean.
setsebool -P kerberos_enabled 1
You can see the context of a file using the -Z option to lsP Policy governs the access confined processes have to these files. SELinux getty policy is very flexible allowing users to setup their getty processes in as secure a method as possible.
The following file types are defined for getty:
getty_etc_t
- Set files with the getty_etc_t type, if you want to store getty files in the /etc directories.
getty_exec_t
- Set files with the getty_exec_t type, if you want to transition an executable to the getty_t domain.
getty_lock_t
- Set files with the getty_lock_t type, if you want to treat the files as getty lock data, stored under the /var/lock directory
getty_log_t
- Set files with the getty_log_t type, if you want to treat the data as getty log data, usually stored under the /var/log directory.
getty_tmp_t
- Set files with the getty_tmp_t type, if you want to store getty temporary files in the /tmp directories.
getty_unit_file_t
- Set files with the getty_unit_file_t type, if you want to treat the files as getty unit content.
getty_var_run_t
- Set files with the getty_var_run_t type, if you want to store the getty files under the /run directory.
Note: File context can be temporarily modified with the chcon command. If you want to permanently change the file context you need to use the semanage fcontext command. This will modify the SELinux labeling database. You will need to use restorecon to apply the labels.
You can see the context of a process using the -Z option to psP Policy governs the access confined processes have to files. SELinux getty policy is very flexible allowing users to setup their getty processes in as secure a method as possible.
The following process types are defined for getty:
getty_t
Note: semanage permissive -a PROCESS_TYPE can be used to make a process type permissive. Permissive process types are not denied access by SELinux. AVC messages will still be generated.
The SELinux user type getty_t can manage files labeled with the following file types. The paths listed are the default paths for these file types. Note the processes UID still need to have DAC permissions.
getty_lock_t
getty_log_t
/var/log/mgetty.log.*
/var/log/vgetty.log..*
getty_tmp_t
getty_var_run_t
/var/spool/fax(/.*)?
/var/spool/voice(/.*)?
/var/run/mgetty.pid.*
initrc_var_run_t
/var/run/utmp
/var/run/random-seed
/var/run/runlevel.dir
/var/run/setmixer_flag
var_run_t
/run/.*
/var/run/.*
/run
/var/run
/var/run
/var/spool/postfix/pid
wtmp_t
/var/log/wtmp.*