secadm_selinux(8) secadm SELinux Policy documentation secadm_selinux(8)NAME
secadm_r - Security administrator role - Security Enhanced Linux Policy
DESCRIPTION
SELinux supports Roles Based Access Control (RBAC), some Linux roles
are login roles, while other roles need to be transition into.
Note: Examples in this man page will use the staff_u SELinux user.
Non login roles are usually used for administrative tasks. For example,
tasks that require root privileges. Roles control which types a user
can run processes with. Roles often have default types assigned to
them.
The default type for the secadm_r role is secadm_t.
The newrole program to transition directly to this role.
newrole -r secadm_r -t secadm_t
sudo is the preferred method to do transition from one role to another.
You setup sudo to transition to secadm_r by adding a similar line to
the /etc/sudoers file.
USERNAME ALL=(ALL) ROLE=secadm_r TYPE=secadm_t COMMAND
sudo will run COMMAND as staff_u:secadm_r:secadm_t:LEVEL
When using a a non login role, you need to setup SELinux so that your
SELinux user can reach secadm_r role.
Execute the following to see all of the assigned SELinux roles:
semanage user -l
You need to add secadm_r to the staff_u user. You could setup the
staff_u user to be able to use the secadm_r role with a command like:
$ semanage user -m -R 'staff_r system_r secadm_r' staff_u
SELinux policy also controls which roles can transition to a different
role. You can list these rules using the following command.
search --role_allow
SELinux policy allows the sysadm_r, staff_r, auditadm_r roles can tran‐
sition to the secadm_r role.
BOOLEANS
SELinux policy is customizable based on least access required. secadm
policy is extremely flexible and has several booleans that allow you to
manipulate the policy and run secadm with the tightest access possible.
If you want to allow users to resolve user passwd entries directly from
ldap rather then using a sssd server, you must turn on the authlo‐
gin_nsswitch_use_ldap boolean. Disabled by default.
setsebool -P authlogin_nsswitch_use_ldap 1
If you want to deny user domains applications to map a memory region as
both executable and writable, this is dangerous and the executable
should be reported in bugzilla, you must turn on the deny_execmem bool‐
ean. Enabled by default.
setsebool -P deny_execmem 1
If you want to deny any process from ptracing or debugging any other
processes, you must turn on the deny_ptrace boolean. Enabled by
default.
setsebool -P deny_ptrace 1
If you want to allow all domains to use other domains file descriptors,
you must turn on the domain_fd_use boolean. Enabled by default.
setsebool -P domain_fd_use 1
If you want to allow all domains to have the kernel load modules, you
must turn on the domain_kernel_load_modules boolean. Disabled by
default.
setsebool -P domain_kernel_load_modules 1
If you want to allow all domains to execute in fips_mode, you must turn
on the fips_mode boolean. Enabled by default.
setsebool -P fips_mode 1
If you want to enable reading of urandom for all domains, you must turn
on the global_ssp boolean. Disabled by default.
setsebool -P global_ssp 1
If you want to allow confined applications to run with kerberos, you
must turn on the kerberos_enabled boolean. Enabled by default.
setsebool -P kerberos_enabled 1
If you want to allow logging in and using the system from /dev/console,
you must turn on the login_console_enabled boolean. Enabled by default.
setsebool -P login_console_enabled 1
If you want to allow system to run with NIS, you must turn on the
nis_enabled boolean. Disabled by default.
setsebool -P nis_enabled 1
If you want to allow confined applications to use nscd shared memory,
you must turn on the nscd_use_shm boolean. Disabled by default.
setsebool -P nscd_use_shm 1
If you want to disallow programs, such as newrole, from transitioning
to administrative user domains, you must turn on the secure_mode bool‐
ean. Enabled by default.
setsebool -P secure_mode 1
If you want to boolean to determine whether the system permits loading
policy, setting enforcing mode, and changing boolean values. Set this
to true and you have to reboot to set it back, you must turn on the
secure_mode_policyload boolean. Enabled by default.
setsebool -P secure_mode_policyload 1
If you want to allow unconfined executables to make their stack exe‐
cutable. This should never, ever be necessary. Probably indicates a
badly coded executable, but could indicate an attack. This executable
should be reported in bugzilla, you must turn on the selinuxuser_exec‐
stack boolean. Enabled by default.
setsebool -P selinuxuser_execstack 1
If you want to allow ssh logins as sysadm_r:sysadm_t, you must turn on
the ssh_sysadm_login boolean. Disabled by default.
setsebool -P ssh_sysadm_login 1
If you want to allow the graphical login program to login directly as
sysadm_r:sysadm_t, you must turn on the xdm_sysadm_login boolean. Dis‐
abled by default.
setsebool -P xdm_sysadm_login 1
MANAGED FILES
The SELinux process type secadm_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.
boolean_type
default_context_t
/etc/selinux/([^/]*/)?contexts(/.*)?
/root/.default_contexts
dosfs_t
etc_runtime_t
/[^/]+
/etc/mtab.*
/etc/blkid(/.*)?
/etc/nologin.*
/etc/.fstab.hal..+
/halt
/fastboot
/poweroff
/etc/cmtab
/forcefsck
/.autofsck
/.suspended
/fsckoptions
/.autorelabel
/etc/killpower
/etc/securetty
/etc/nohotplug
/etc/ioctl.save
/etc/fstab.REVOKE
/etc/network/ifstate
/etc/sysconfig/hwconf
/etc/ptal/ptal-printd-like
/etc/sysconfig/iptables.save
/etc/xorg.conf.d/00-system-setup-keyboard.conf
/etc/X11/xorg.conf.d/00-system-setup-keyboard.conf
file_context_t
/etc/selinux/([^/]*/)?contexts/files(/.*)?
screen_home_t
/root/.screen(/.*)?
/home/[^/]*/.screen(/.*)?
/home/[^/]*/.screenrc
selinux_config_t
/etc/selinux(/.*)?
/etc/selinux/([^/]*/)?seusers
/etc/selinux/([^/]*/)?users(/.*)?
/etc/selinux/([^/]*/)?setrans.conf
/var/lib/sepolgen(/.*)?
selinux_login_config_t
/etc/selinux/([^/]*/)?logins(/.*)?
semanage_store_t
/etc/selinux/([^/]*/)?policy(/.*)?
/etc/selinux/([^/]*/)?modules/(active|tmp|previous)(/.*)?
/etc/share/selinux/mls(/.*)?
/etc/share/selinux/targeted(/.*)?
systemd_passwd_var_run_t
/var/run/systemd/ask-password(/.*)?
/var/run/systemd/ask-password-block(/.*)?
COMMANDS
semanage fcontext can also be used to manipulate default file context
mappings.
semanage permissive can also be used to manipulate whether or not a
process type is permissive.
semanage module can also be used to enable/disable/install/remove pol‐
icy modules.
semanage boolean can also be used to manipulate the booleans
system-config-selinux is a GUI tool available to customize SELinux pol‐
icy settings.
AUTHOR
This manual page was auto-generated using sepolicy manpage .
SEE ALSOselinux(8), secadm(8), semanage(8), restorecon(8), chcon(1), sepol‐
icy(8) , setsebool(8), secadm_screen_selinux(8),
secadm_screen_selinux(8), secadm_su_selinux(8), secadm_su_selinux(8),
secadm_sudo_selinux(8), secadm_sudo_selinux(8)mgrepl@redhat.com secadm secadm_selinux(8)
