slapd_selinux man page

slapd_selinux — Security Enhanced Linux Policy for the slapd processes

Description

Security-Enhanced Linux secures the slapd processes via flexible mandatory access control.

The slapd processes execute with the slapd_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 slapd_t

Entrypoints

The slapd_t SELinux type can be entered via the slapd_exec_t file type.

The default entrypoint paths for the slapd_t domain are the following:

/usr/lib/slapd, /usr/sbin/slapd, /usr/lib/openldap/slapd

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 psbP

Policy governs the access confined processes have to files. SELinux slapd policy is very flexible allowing users to setup their slapd processes in as secure a method as possible.

The following process types are defined for slapd:

slapd_t

Note: semanage permissive -a slapd_t can be used to make the process type slapd_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. slapd policy is extremely flexible and has several booleans that allow you to manipulate the policy and run slapd 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 authlogin_nsswitch_use_ldap boolean. Disabled by default.

setsebool -P authlogin_nsswitch_use_ldap 1

If you want to allow all daemons to write corefiles to /, you must turn on the daemons_dump_core boolean. Disabled by default.

setsebool -P daemons_dump_core 1

If you want to enable cluster mode for daemons, you must turn on the daemons_enable_cluster_mode boolean. Enabled by default.

setsebool -P daemons_enable_cluster_mode 1

If you want to allow all daemons to use tcp wrappers, you must turn on the daemons_use_tcp_wrapper boolean. Disabled by default.

setsebool -P daemons_use_tcp_wrapper 1

If you want to allow all daemons the ability to read/write terminals, you must turn on the daemons_use_tty boolean. Disabled by default.

setsebool -P daemons_use_tty 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 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

Managed Files

The SELinux process type slapd_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(/.*)?

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

/var/run/crm(/.*)?
/var/run/cman_.*
/var/run/rsctmp(/.*)?
/var/run/aisexec.*
/var/run/heartbeat(/.*)?
/var/run/corosync-qnetd(/.*)?
/var/run/corosync-qdevice(/.*)?
/var/run/cpglockd.pid
/var/run/corosync.pid
/var/run/rgmanager.pid
/var/run/cluster/rgmanager.sk

krb5_host_rcache_t

/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

root_t

/
/initrd

security_t

/selinux

slapd_db_t

/var/lib/ldap(/.*)?
/etc/openldap/slapd.d(/.*)?
/var/lib/openldap-data(/.*)?
/var/lib/openldap-ldbm(/.*)?
/var/lib/openldap-slurpd(/.*)?

slapd_lock_t

/var/lock/subsys/ldap
/var/lock/subsys/slapd

slapd_log_t

/var/log/ldap.*
/var/log/slapd.*

slapd_replog_t

/var/lib/ldap/replog(/.*)?

slapd_tmp_t

slapd_tmpfs_t

slapd_var_run_t

/var/run/openldap(/.*)?
/var/run/ldapi
/var/run/slapd.pid
/var/run/slapd.args

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 lsbP

Policy governs the access confined processes have to these files. SELinux slapd policy is very flexible allowing users to setup their slapd processes in as secure a method as possible.

EQUIVALENCE DIRECTORIES

slapd policy stores data with multiple different file context types under the /var/lib/ldap 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 dirctory you would execute the following command:

semanage fcontext -a -e /var/lib/ldap /srv/ldap
restorecon -R -v /srv/ldap

STANDARD FILE CONTEXT

SELinux defines the file context types for the slapd, if you wanted to store files with these types in a diffent paths, you need to execute the semanage command to sepecify alternate labeling and then use restorecon to put the labels on disk.

semanage fcontext -a -t slapd_var_run_t '/srv/myslapd_content(/.*)?'
restorecon -R -v /srv/myslapd_content

Note: SELinux often uses regular expressions to specify labels that match multiple files.

The following file types are defined for slapd:

slapd_cert_t

- Set files with the slapd_cert_t type, if you want to treat the files as slapd certificate data.

slapd_db_t

- Set files with the slapd_db_t type, if you want to treat the files as slapd database content.

Paths:
/var/lib/ldap(/.*)?, /etc/openldap/slapd.d(/.*)?, /var/lib/openldap-data(/.*)?, /var/lib/openldap-ldbm(/.*)?, /var/lib/openldap-slurpd(/.*)?

slapd_etc_t

- Set files with the slapd_etc_t type, if you want to store slapd files in the /etc directories.

slapd_exec_t

- Set files with the slapd_exec_t type, if you want to transition an executable to the slapd_t domain.

Paths:
/usr/lib/slapd, /usr/sbin/slapd, /usr/lib/openldap/slapd

slapd_initrc_exec_t

- Set files with the slapd_initrc_exec_t type, if you want to transition an executable to the slapd_initrc_t domain.

slapd_keytab_t

- Set files with the slapd_keytab_t type, if you want to treat the files as kerberos keytab files.

slapd_lock_t

- Set files with the slapd_lock_t type, if you want to treat the files as slapd lock data, stored under the /var/lock directory

Paths:
/var/lock/subsys/ldap, /var/lock/subsys/slapd

slapd_log_t

- Set files with the slapd_log_t type, if you want to treat the data as slapd log data, usually stored under the /var/log directory.

Paths:
/var/log/ldap.*, /var/log/slapd.*

slapd_replog_t

- Set files with the slapd_replog_t type, if you want to treat the files as slapd replog data.

slapd_tmp_t

- Set files with the slapd_tmp_t type, if you want to store slapd temporary files in the /tmp directories.

slapd_tmpfs_t

- Set files with the slapd_tmpfs_t type, if you want to store slapd files on a tmpfs file system.

slapd_unit_file_t

- Set files with the slapd_unit_file_t type, if you want to treat the files as slapd unit content.

slapd_var_run_t

- Set files with the slapd_var_run_t type, if you want to store the slapd files under the /run or /var/run directory.

Paths:
/var/run/openldap(/.*)?, /var/run/ldapi, /var/run/slapd.pid, /var/run/slapd.args

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), slapd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8) , setsebool(8)

Info

16-12-08 slapd SELinux Policy slapd