NAME¶

nsplugin_selinux - Security Enhanced Linux Policy for the nsplugin processes

DESCRIPTION¶

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

The nsplugin processes execute with the nsplugin_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 nsplugin_t

ENTRYPOINTS¶

The nsplugin_t SELinux type can be entered via the nsplugin_exec_t file type.

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

/usr/lib(64)?/nspluginwrapper/npviewer.bin, /usr/bin/nspluginscan, /usr/bin/nspluginviewer

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

The following process types are defined for nsplugin:

nsplugin_t, nsplugin_config_t

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

If you want to allow nsplugin code to connect to unreserved ports, you must turn on the nsplugin_can_network boolean. Enabled by default.

setsebool -P nsplugin_can_network 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 nsplugin code to execmem/execstack, you must turn on the allow_nsplugin_execmem boolean. Enabled by default.

setsebool -P allow_nsplugin_execmem 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 transition to confined nsplugin domains from unconfined user, you must turn on the allow_unconfined_nsplugin_transition boolean. Disabled by default.

setsebool -P allow_unconfined_nsplugin_transition 1

If you want to allows clients to write to the X server shared memory segments, you must turn on the allow_write_xshm boolean. Disabled by default.

setsebool -P allow_write_xshm 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 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 use nscd shared memory, you must turn on the nscd_use_shm boolean. Enabled by default.

setsebool -P nscd_use_shm 1

If you want to support NFS home directories, you must turn on the use_nfs_home_dirs boolean. Disabled by default.

setsebool -P use_nfs_home_dirs 1

If you want to support SAMBA home directories, you must turn on the use_samba_home_dirs boolean. Disabled by default.

setsebool -P use_samba_home_dirs 1

If you want to support X userspace object manager, you must turn on the xserver_object_manager boolean. Disabled by default.

setsebool -P xserver_object_manager 1

MANAGED FILES¶

The SELinux process type nsplugin_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.

anon_inodefs_t

cifs_t

gnome_home_type

initrc_tmp_t

mnt_t

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

mozilla_home_t

/home/[^/]*/.java(/.*)?
/home/[^/]*/.galeon(/.*)?
/home/[^/]*/.mozilla(/.*)?
/home/[^/]*/.phoenix(/.*)?
/home/[^/]*/.netscape(/.*)?
/home/[^/]*/.thunderbird(/.*)?
/home/staff/.java(/.*)?
/home/staff/.galeon(/.*)?
/home/staff/.mozilla(/.*)?
/home/staff/.phoenix(/.*)?
/home/staff/.netscape(/.*)?
/home/staff/.thunderbird(/.*)?

nfs_t

nsplugin_home_t

/home/[^/]*/.adobe(/.*)?
/home/[^/]*/.macromedia(/.*)?
/home/[^/]*/.gcjwebplugin(/.*)?
/home/[^/]*/.icedteaplugin(/.*)?
/home/staff/.adobe(/.*)?
/home/staff/.macromedia(/.*)?
/home/staff/.gcjwebplugin(/.*)?
/home/staff/.icedteaplugin(/.*)?

pulseaudio_home_t

/home/[^/]*/.pulse(/.*)?
/home/[^/]*/.pulse-cookie
/home/staff/.pulse(/.*)?
/home/staff/.pulse-cookie

tmp_t

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

user_fonts_cache_t

/home/[^/]*/.fonts/auto(/.*)?
/home/[^/]*/.fontconfig(/.*)?
/home/[^/]*/.fonts.cache-.*
/home/staff/.fonts/auto(/.*)?
/home/staff/.fontconfig(/.*)?
/home/staff/.fonts.cache-.*

user_fonts_config_t

/home/[^/]*/.fonts.d(/.*)?
/home/[^/]*/.fonts.conf
/home/staff/.fonts.d(/.*)?
/home/staff/.fonts.conf

user_fonts_t

/home/[^/]*/.fonts(/.*)?
/home/staff/.fonts(/.*)?

user_tmp_t

/tmp/gconfd-.*
/tmp/gconfd-staff

user_tmpfs_t

/dev/shm/mono.*
/dev/shm/pulse-shm.*

xserver_tmpfs_t

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

STANDARD FILE CONTEXT

SELinux defines the file context types for the nsplugin, 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 nsplugin_tmp_t '/srv/mynsplugin_content(/.*)?'
restorecon -R -v /srv/mynsplugin_content

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

The following file types are defined for nsplugin:

nsplugin_config_exec_t

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

nsplugin_exec_t

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

Paths:

/usr/lib(64)?/nspluginwrapper/npviewer.bin, /usr/bin/nspluginscan, /usr/bin/nspluginviewer

nsplugin_home_t

- Set files with the nsplugin_home_t type, if you want to store nsplugin files in the users home directory.

Paths:

/home/[^/]*/.adobe(/.*)?, /home/[^/]*/.macromedia(/.*)?, /home/[^/]*/.gcjwebplugin(/.*)?, /home/[^/]*/.icedteaplugin(/.*)?, /home/staff/.adobe(/.*)?, /home/staff/.macromedia(/.*)?, /home/staff/.gcjwebplugin(/.*)?, /home/staff/.icedteaplugin(/.*)?

nsplugin_rw_t

- Set files with the nsplugin_rw_t type, if you want to treat the files as nsplugin read/write content.

nsplugin_tmp_t

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

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), nsplugin(8), semanage(8), restorecon(8), chcon(1) , setsebool(8), nsplugin_config_selinux(8), nsplugin_config_selinux(8)