NAME¶

rpcd_selinux - Security Enhanced Linux Policy for the rpcd processes

DESCRIPTION¶

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

The rpcd processes execute with the rpcd_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 rpcd_t

ENTRYPOINTS¶

The rpcd_t SELinux type can be entered via the rpcd_exec_t file type.

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

/sbin/rpc..*, /usr/sbin/rpc..*, /sbin/sm-notify, /usr/sbin/rpc.idmapd, /usr/sbin/rpc.rquotad

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 rpcd policy is very flexible allowing users to setup their rpcd processes in as secure a method as possible.

The following process types are defined for rpcd:

rpcd_t

Note: semanage permissive -a rpcd_t can be used to make the process type rpcd_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. rpcd policy is extremely flexible and has several booleans that allow you to manipulate the policy and run rpcd with the tightest access possible.

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

setsebool -P allow_daemons_dump_core 1

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

setsebool -P allow_daemons_use_tcp_wrapper 1

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

setsebool -P allow_daemons_use_tty 1

If you want to allow all domains to use other domains file descriptors, you must turn on the allow_domain_fd_use boolean. Enabled by default.

setsebool -P allow_domain_fd_use 1

If you want to allow confined applications to run with kerberos, you must turn on the allow_kerberos boolean. Enabled by default.

setsebool -P allow_kerberos 1

If you want to allow sysadm to debug or ptrace all processes, you must turn on the allow_ptrace boolean. Disabled by default.

setsebool -P allow_ptrace 1

If you want to allow system to run with NIS, you must turn on the allow_ypbind boolean. Disabled by default.

setsebool -P allow_ypbind 1

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

setsebool -P daemons_enable_cluster_mode 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 enable support for upstart as the init program, you must turn on the init_upstart boolean. Enabled by default.

setsebool -P init_upstart 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 rpcd_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.

cluster_conf_t

/etc/cluster(/.*)?

cluster_tmp_t

cluster_var_lib_t

/var/lib(64)?/openais(/.*)?
/var/lib(64)?/pengine(/.*)?
/var/lib(64)?/corosync(/.*)?
/usr/lib(64)?/heartbeat(/.*)?
/var/lib(64)?/heartbeat(/.*)?
/var/lib(64)?/pacemaker(/.*)?
/var/lib/cluster(/.*)?

cluster_var_run_t

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

initrc_tmp_t

mnt_t

/mnt(/[^/]*)
/mnt(/[^/]*)?
/rhev(/[^/]*)?
/media(/[^/]*)
/media(/[^/]*)?
/etc/rhgb(/.*)?
/media/.hal-.*
/net
/afs
/rhev
/misc

root_t

/
/initrd

rpcd_var_run_t

/var/run/rpc.statd(/.*)?
/var/run/rpc.statd.pid

tmp_t

/tmp
/usr/tmp
/var/tmp
/tmp-inst
/var/tmp-inst
/var/tmp/vi.recover

var_lib_nfs_t

/var/lib/nfs(/.*)?

var_lib_t

/opt/(.*/)?var/lib(64)?(/.*)?
/var/lib(/.*)?

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 rpcd policy is very flexible allowing users to setup their rpcd processes in as secure a method as possible.

EQUIVALENCE DIRECTORIES

rpcd policy stores data with multiple different file context types under the /var/run/rpc.statd 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/run/rpc.statd /srv/rpc.statd
restorecon -R -v /srv/rpc.statd

STANDARD FILE CONTEXT

SELinux defines the file context types for the rpcd, 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 rpcd_var_run_t '/srv/myrpcd_content(/.*)?'
restorecon -R -v /srv/myrpcd_content

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

The following file types are defined for rpcd:

rpcd_exec_t

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

Paths:

/sbin/rpc..*, /usr/sbin/rpc..*, /sbin/sm-notify, /usr/sbin/rpc.idmapd, /usr/sbin/rpc.rquotad

rpcd_initrc_exec_t

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

Paths:

/etc/rc.d/init.d/nfslock, /etc/rc.d/init.d/rpcidmapd

rpcd_var_run_t

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

Paths:

/var/run/rpc.statd(/.*)?, /var/run/rpc.statd.pid

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), rpcd(8), semanage(8), restorecon(8), chcon(1) , setsebool(8)