table of contents
sssd_selinux(8) | SELinux Policy sssd | sssd_selinux(8) |
NAME¶
sssd_selinux - Security Enhanced Linux Policy for the sssd processes
DESCRIPTION¶
Security-Enhanced Linux secures the sssd processes via flexible mandatory access control.
The sssd processes execute with the sssd_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier.
For example:
ps -eZ | grep sssd_t
ENTRYPOINTS¶
The sssd_t SELinux type can be entered via the sssd_exec_t file type.
The default entrypoint paths for the sssd_t domain are the following:
/usr/bin/sssd, /usr/bin/sss_cache, /usr/libexec/sssd/sssd_ifp, /usr/libexec/sssd/sssd_kcm, /usr/libexec/sssd/sssd_nss, /usr/libexec/sssd/sssd_pac, /usr/libexec/sssd/sssd_pam, /usr/libexec/sssd/sssd_ssh, /usr/libexec/sssd/sssd_sudo, /usr/libexec/sssd/sssd_autofs, /usr/libexec/sssd/sssd_secrets
PROCESS TYPES¶
SELinux defines process types (domains) for each process running on the system
You can see the context of a process using the -Z option to ps
Policy governs the access confined processes have to files. SELinux sssd policy is very flexible allowing users to setup their sssd processes in as secure a method as possible.
The following process types are defined for sssd:
sssd_t, sssd_selinux_manager_t
Note: semanage permissive -a sssd_t can be used to make the process type sssd_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated.
BOOLEANS¶
SELinux policy is customizable based on least access required. sssd policy is extremely flexible and has several booleans that allow you to manipulate the policy and run sssd with the tightest access possible.
If you want to allow sssd read, view, and write access to kernel keys with kernel_t type, you must turn on the sssd_access_kernel_keys boolean. Disabled by default.
setsebool -P sssd_access_kernel_keys 1
If you want to allow sssd connect to all unreserved ports, you must turn on the sssd_connect_all_unreserved_ports boolean. Disabled by default.
setsebool -P sssd_connect_all_unreserved_ports 1
If you want to allow sssd use usb devices, you must turn on the sssd_use_usb boolean. Disabled by default.
setsebool -P sssd_use_usb 1
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 authlogin_nsswitch_use_ldap boolean. Disabled by default.
setsebool -P authlogin_nsswitch_use_ldap 1
If you want to dontaudit all daemons scheduling requests (setsched, sys_nice), you must turn on the daemons_dontaudit_scheduling boolean. Enabled by default.
setsebool -P daemons_dontaudit_scheduling 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 allow Apache to communicate with sssd service via dbus, you must turn on the httpd_dbus_sssd boolean. Disabled by default.
setsebool -P httpd_dbus_sssd 1
If you want to allow confined applications to run with kerberos, you must turn on the kerberos_enabled boolean. Disabled by default.
setsebool -P kerberos_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. Enabled by default.
setsebool -P nscd_use_shm 1
MANAGED FILES¶
The SELinux process type sssd_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.
auth_cache_t
/var/cache/coolkey(/.*)?
cert_t
/etc/(letsencrypt|certbot)/(live|archive)(/.*)?
/etc/pki(/.*)?
/etc/ssl(/.*)?
/etc/ipa/nssdb(/.*)?
/etc/httpd/alias(/.*)?
/etc/docker/certs.d(/.*)?
/usr/share/ssl/certs(/.*)?
/var/lib/letsencrypt(/.*)?
/usr/share/ssl/private(/.*)?
/var/lib/ca-certificates(/.*)?
/var/named/chroot/etc/pki(/.*)?
/usr/share/ca-certificates(/.*)?
/usr/share/pki/ca-certificates(/.*)?
/usr/share/pki/ca-trust-source(/.*)?
cluster_conf_t
/etc/cluster(/.*)?
cluster_var_lib_t
/var/lib/pcsd(/.*)?
/var/lib/cluster(/.*)?
/var/lib/openais(/.*)?
/var/lib/pengine(/.*)?
/var/lib/corosync(/.*)?
/usr/lib/heartbeat(/.*)?
/var/lib/heartbeat(/.*)?
/var/lib/pacemaker(/.*)?
cluster_var_run_t
/run/crm(/.*)?
/run/cman_.*
/run/rsctmp(/.*)?
/run/aisexec.*
/run/heartbeat(/.*)?
/run/pcsd-ruby.socket
/run/corosync-qnetd(/.*)?
/run/corosync-qdevice(/.*)?
/run/pcsd.socket
/run/corosync.pid
/run/cpglockd.pid
/run/rgmanager.pid
/run/cluster/rgmanager.sk
faillog_t
/var/log/btmp.*
/run/faillock(/.*)?
/var/log/faillog.*
/var/log/tallylog.*
ica_tmpfs_t
/dev/shm/icastats_0
krb5_conf_t
/etc/krb5.conf
krb5_host_rcache_t
/var/tmp/krb5_0.rcache2
/var/cache/krb5rcache(/.*)?
/var/tmp/nfs_0
/var/tmp/DNS_25
/var/tmp/host_0
/var/tmp/imap_0
/var/tmp/HTTP_23
/var/tmp/HTTP_48
/var/tmp/ldap_55
/var/tmp/ldap_487
/var/tmp/ldapmap1_0
krb5_keytab_t
/var/kerberos/krb5(/.*)?
/etc/krb5.keytab
/etc/krb5kdc/kadm5.keytab
/var/kerberos/krb5kdc/kadm5.keytab
root_t
/sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
/
/initrd
/var/lib/ntp
samba_var_t
/var/nmbd(/.*)?
/var/lib/samba(/.*)?
/var/cache/samba(/.*)?
security_t
/selinux
selinux_login_config_t
/etc/selinux/([^/]*/)?logins(/.*)?
sssd_public_t
/var/lib/sss/mc(/.*)?
/var/lib/sss/pubconf(/.*)?
sssd_var_lib_t
/var/lib/sss(/.*)?
sssd_var_log_t
/var/log/sssd(/.*)?
sssd_var_run_t
/run/sssd.pid
/run/secrets.socket
/run/.heim_org.h5l.kcm-socket
user_tmp_type
all user tmp files
FILE CONTEXTS¶
SELinux requires files to have an extended attribute to define the file type.
You can see the context of a file using the -Z option to ls
Policy governs the access confined processes have to these files. SELinux sssd policy is very flexible allowing users to setup their sssd processes in as secure a method as possible.
EQUIVALENCE DIRECTORIES
sssd policy stores data with multiple different file context types under the /var/lib/sss directory. If you would like to store the data in a different directory you can use the semanage command to create an equivalence mapping. If you wanted to store this data under the /srv directory you would execute the following command:
semanage fcontext -a -e /var/lib/sss /srv/sss
restorecon -R -v /srv/sss
STANDARD FILE CONTEXT
SELinux defines the file context types for the sssd, if you wanted to store files with these types in a different paths, you need to execute the semanage command to specify alternate labeling and then use restorecon to put the labels on disk.
semanage fcontext -a -t sssd_exec_t
'/srv/sssd/content(/.*)?'
restorecon -R -v /srv/mysssd_content
Note: SELinux often uses regular expressions to specify labels that match multiple files.
The following file types are defined for sssd:
sssd_conf_t
- Set files with the sssd_conf_t type, if you want to treat the files as sssd configuration data, usually stored under the /etc directory.
sssd_exec_t
- Set files with the sssd_exec_t type, if you want to transition an executable to the sssd_t domain.
- Paths:
- /usr/bin/sssd, /usr/bin/sss_cache, /usr/libexec/sssd/sssd_ifp, /usr/libexec/sssd/sssd_kcm, /usr/libexec/sssd/sssd_nss, /usr/libexec/sssd/sssd_pac, /usr/libexec/sssd/sssd_pam, /usr/libexec/sssd/sssd_ssh, /usr/libexec/sssd/sssd_sudo, /usr/libexec/sssd/sssd_autofs, /usr/libexec/sssd/sssd_secrets
sssd_initrc_exec_t
- Set files with the sssd_initrc_exec_t type, if you want to transition an executable to the sssd_initrc_t domain.
sssd_public_t
- Set files with the sssd_public_t type, if you want to treat the files as sssd public data.
- Paths:
- /var/lib/sss/mc(/.*)?, /var/lib/sss/pubconf(/.*)?
sssd_selinux_manager_exec_t
- Set files with the sssd_selinux_manager_exec_t type, if you want to transition an executable to the sssd_selinux_manager_t domain.
sssd_unit_file_t
- Set files with the sssd_unit_file_t type, if you want to treat the files as sssd unit content.
sssd_var_lib_t
- Set files with the sssd_var_lib_t type, if you want to store the sssd files under the /var/lib directory.
sssd_var_log_t
- Set files with the sssd_var_log_t type, if you want to treat the data as sssd var log data, usually stored under the /var/log directory.
sssd_var_run_t
- Set files with the sssd_var_run_t type, if you want to store the sssd files under the /run or /var/run directory.
- Paths:
- /run/sssd.pid, /run/secrets.socket, /run/.heim_org.h5l.kcm-socket
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.
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 policy modules.
semanage boolean can also be used to manipulate the booleans
system-config-selinux is a GUI tool available to customize SELinux policy settings.
AUTHOR¶
This manual page was auto-generated using sepolicy manpage .
SEE ALSO¶
selinux(8), sssd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8), sssd_selinux_manager_selinux(8)
24-11-05 | sssd |