Security-Enhanced Linux secures the certmaster 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 certmaster_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 certmaster_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 certmaster policy is very flexible allowing users to setup their certmaster processes in as secure a method as possible.
The following file types are defined for certmaster:
certmaster_etc_rw_t
- Set files with the certmaster_etc_rw_t type, if you want to treat the files as certmaster etc read/write content.
certmaster_exec_t
- Set files with the certmaster_exec_t type, if you want to transition an executable to the certmaster_t domain.
certmaster_initrc_exec_t
- Set files with the certmaster_initrc_exec_t type, if you want to transition an executable to the certmaster_initrc_t domain.
certmaster_var_lib_t
- Set files with the certmaster_var_lib_t type, if you want to store the certmaster files under the /var/lib directory.
certmaster_var_log_t
- Set files with the certmaster_var_log_t type, if you want to treat the data as certmaster var log data, usually stored under the /var/log directory.
certmaster_var_run_t
- Set files with the certmaster_var_run_t type, if you want to store the certmaster 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 types associated with a port by using the following command:
semanage port -l
Policy governs the access confined processes have to these ports. SELinux certmaster policy is very flexible allowing users to setup their certmaster processes in as secure a method as possible.
The following port types are defined for certmaster:
Default Defined Ports: tcp 51235
You can see the context of a process using the -Z option to psP Policy governs the access confined processes have to files. SELinux certmaster policy is very flexible allowing users to setup their certmaster processes in as secure a method as possible.
The following process types are defined for certmaster:
certmaster_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 certmaster_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.
cert_t
/etc/pki(/.*)?
/etc/httpd/alias(/.*)?
/usr/share/ssl/certs(/.*)?
/usr/share/ssl/private(/.*)?
/var/named/chroot/etc/pki(/.*)?
certmaster_etc_rw_t
/etc/certmaster(/.*