Security-Enhanced Linux secures the chrome_sandbox_nacl processes via flexible mandatory access control.
The chrome_sandbox_nacl processes execute with the chrome_sandbox_nacl_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier.
ps -eZ | grep chrome_sandbox_nacl_t
The chrome_sandbox_nacl_t SELinux type can be entered via the chrome_sandbox_nacl_exec_t, usr_t, bin_t file types.
The default entrypoint paths for the chrome_sandbox_nacl_t domain are the following:
All executables with the default executable label, usually stored in /usr/bin and /usr/sbin. /opt/google/chrome[^/]*/nacl_helper_bootstrap, /opt/google/chrome/nacl_helper_bootstrap, /usr/lib/chromium-browser/nacl_helper_bootstrap, /opt/.*, /usr/.*, /emul/.*, /export(/.*)?, /ostree(/.*)?, /usr/doc(/.*)?/lib(/.*)?, /usr/inclu.e(/.*)?, /usr/share/rpm(/.*)?, /usr/share/doc(/.*)?/README.*, /usr/lib/modules(/.*)/vmlinuz, /usr/lib/modules(/.*)/initramfs.img, /usr/lib/sysimage(/.*)?, /usr/lib/ostree-boot(/.*)?, /opt, /usr, /emul
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 chrome_sandbox_nacl policy is very flexible allowing users to setup their chrome_sandbox_nacl processes in as secure a method as possible.
The following process types are defined for chrome_sandbox_nacl:
Note: semanage permissive -a chrome_sandbox_nacl_t can be used to make the process type chrome_sandbox_nacl_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated.
The SELinux process type chrome_sandbox_nacl_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.
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 chrome_sandbox_nacl policy is very flexible allowing users to setup their chrome_sandbox_nacl processes in as secure a method as possible.
STANDARD FILE CONTEXT
SELinux defines the file context types for the chrome_sandbox_nacl, 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 chrome_sandbox_nacl_exec_t '/srv/chrome_sandbox_nacl/content(/.*)?'
restorecon -R -v /srv/mychrome_sandbox_nacl_content
Note: SELinux often uses regular expressions to specify labels that match multiple files.
The following file types are defined for chrome_sandbox_nacl:
- Set files with the chrome_sandbox_nacl_exec_t type, if you want to transition an executable to the chrome_sandbox_nacl_t domain.
/opt/google/chrome[^/]*/nacl_helper_bootstrap, /opt/google/chrome/nacl_helper_bootstrap, /usr/lib/chromium-browser/nacl_helper_bootstrap
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.
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.
system-config-selinux is a GUI tool available to customize SELinux policy settings.
This manual page was auto-generated using sepolicy manpage .
selinux(8), chrome_sandbox_nacl(8), semanage(8), restorecon(8), chcon(1), sepolicy(8)