ethereal_selinux(8) SELinux Policy ethereal ethereal_selinux(8)

NAME ethereal_selinux - Security Enhanced Linux Policy for the ethereal pro- cesses

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

The ethereal processes execute with the ethereal_t SELinux type. You can check if you have these processes running by executing the ps com- mand with the -Z qualifier.

For example:

ps -eZ | grep ethereal_t

ENTRYPOINTS The ethereal_t SELinux type can be entered via the ethereal_exec_t file type.

The default entrypoint paths for the ethereal_t domain are the follow- ing:

/usr/sbin/ethereal.*

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

The following process types are defined for ethereal:

ethereal_t

Note: semanage permissive -a ethereal_t can be used to make the process type ethereal_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still gener- ated.

BOOLEANS SELinux policy is customizable based on least access required. ethe- real policy is extremely flexible and has several booleans that allow you to manipulate the policy and run ethereal with the tightest access possible.

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 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 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 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 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 ethereal_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.

cifs_t

ethereal_home_t

/home/[^/]*/.ethereal(/.*)? /home/xguest/.ethereal(/.*)?

ethereal_tmp_t

ethereal_tmpfs_t

nfs_t

user_fonts_cache_t

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

user_home_t

/home/[^/]*/.+ /home/xguest/.+

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

STANDARD FILE CONTEXT

SELinux defines the file context types for the ethereal, 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 ethereal_exec_t /srv/ethereal/content(/.*)? restorecon -R -v /srv/myethereal_content

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

The following file types are defined for ethereal:

ethereal_exec_t

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

ethereal_home_t

- Set files with the ethereal_home_t type, if you want to store ethe- real files in the users home directory.

Paths: /home/[^/]*/.ethereal(/.*)?, /home/xguest/.ethereal(/.*)?

ethereal_tmp_t

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

ethereal_tmpfs_t

- Set files with the ethereal_tmpfs_t type, if you want to store ethe- real files on a tmpfs file system.

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 pol- icy modules.

semanage boolean can also be used to manipulate the booleans

system-config-selinux is a GUI tool available to customize SELinux pol- icy settings.

AUTHOR This manual page was auto-generated using sepolicy manpage .

SEE ALSO selinux(8), ethereal(8), semanage(8), restorecon(8), chcon(1) , setse- bool(8)

ethereal 13-09-27 ethereal_selinux(8)