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<h1 align="center">sandbox_selinux</h1>
<a href="#NAME">NAME</a><br>
<a href="#DESCRIPTION">DESCRIPTION</a><br>
<a href="#ENTRYPOINTS">ENTRYPOINTS</a><br>
<a href="#PROCESS TYPES">PROCESS TYPES</a><br>
<a href="#MCS Constrained">MCS Constrained</a><br>
<a href="#BOOLEANS">BOOLEANS</a><br>
<a href="#MANAGED FILES">MANAGED FILES</a><br>
<a href="#FILE CONTEXTS">FILE CONTEXTS</a><br>
<a href="#COMMANDS">COMMANDS</a><br>
<a href="#AUTHOR">AUTHOR</a><br>
<a href="#SEE ALSO">SEE ALSO</a><br>
<hr>
<h2>NAME
<a name="NAME"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">sandbox_selinux
− Security Enhanced Linux Policy for the sandbox
processes</p>
<h2>DESCRIPTION
<a name="DESCRIPTION"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">Security-Enhanced
Linux secures the sandbox processes via flexible mandatory
access control.</p>
<p style="margin-left:11%; margin-top: 1em">The sandbox
processes execute with the sandbox_t SELinux type. You can
check if you have these processes running by executing the
<b>ps</b> command with the <b>−Z</b> qualifier.</p>
<p style="margin-left:11%; margin-top: 1em">For
example:</p>
<p style="margin-left:11%; margin-top: 1em"><b>ps -eZ |
grep sandbox_t</b></p>
<h2>ENTRYPOINTS
<a name="ENTRYPOINTS"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">The sandbox_t
SELinux type can be entered via the <b>file_type</b> file
type.</p>
<p style="margin-left:11%; margin-top: 1em">The default
entrypoint paths for the sandbox_t domain are the
following:</p>
<p style="margin-left:11%; margin-top: 1em">all files on
the system</p>
<h2>PROCESS TYPES
<a name="PROCESS TYPES"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">SELinux defines
process types (domains) for each process running on the
system</p>
<p style="margin-left:11%; margin-top: 1em">You can see the
context of a process using the <b>−Z</b> option to
<b>ps</b></p>
<p style="margin-left:11%; margin-top: 1em">Policy governs
the access confined processes have to files. SELinux sandbox
policy is very flexible allowing users to setup their
sandbox processes in as secure a method as possible.</p>
<p style="margin-left:11%; margin-top: 1em">The following
process types are defined for sandbox:</p>
<p style="margin-left:11%; margin-top: 1em"><b>sandbox_t,
sandbox_xserver_t, sandbox_min_t, sandbox_min_client_t,
sandbox_x_t, sandbox_x_client_t, sandbox_web_t,
sandbox_web_client_t, sandbox_net_t,
sandbox_net_client_t</b></p>
<p style="margin-left:11%; margin-top: 1em">Note:
<b>semanage permissive -a sandbox_t</b> can be used to make
the process type sandbox_t permissive. SELinux does not deny
access to permissive process types, but the AVC (SELinux
denials) messages are still generated.</p>
<h2>MCS Constrained
<a name="MCS Constrained"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">The SELinux
process type sandbox_t is an MCS (Multi Category Security)
constrained type. Sometimes this separation is referred to
as sVirt. These types are usually used for securing
multi-tenant environments, such as virtualization,
containers or separation of users. The tools used to launch
MCS types, pick out a different MCS label for each process
group.</p>
<p style="margin-left:11%; margin-top: 1em">For example one
process might be launched with sandbox_t:s0:c1,c2, and
another process launched with sandbox_t:s0:c3,c4. The
SELinux kernel only allows these processes can only write to
content with a matching MCS label, or a MCS Label of s0. A
process running with the MCS level of s0:c1,c2 is not
allowed to write to content with the MCS label of
s0:c3,c4</p>
<h2>BOOLEANS
<a name="BOOLEANS"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">SELinux policy
is customizable based on least access required. sandbox
policy is extremely flexible and has several booleans that
allow you to manipulate the policy and run sandbox with the
tightest access possible.</p>
<p style="margin-left:11%; margin-top: 1em">If you want to
deny user domains applications to map a memory region as
both executable and writable, this is dangerous and the
executable should be reported in bugzilla, you must turn on
the deny_execmem boolean. Enabled by default.</p>
<p style="margin-left:11%; margin-top: 1em"><b>setsebool -P
deny_execmem 1</b></p>
<p style="margin-left:11%; margin-top: 1em">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.</p>
<p style="margin-left:11%; margin-top: 1em"><b>setsebool -P
deny_ptrace 1</b></p>
<p style="margin-left:11%; margin-top: 1em">If you want to
allow any process to mmap any file on system with attribute
file_type, you must turn on the domain_can_mmap_files
boolean. Enabled by default.</p>
<p style="margin-left:11%; margin-top: 1em"><b>setsebool -P
domain_can_mmap_files 1</b></p>
<p style="margin-left:11%; margin-top: 1em">If you want to
allow all domains write to kmsg_device, while kernel is
executed with systemd.log_target=kmsg parameter, you must
turn on the domain_can_write_kmsg boolean. Disabled by
default.</p>
<p style="margin-left:11%; margin-top: 1em"><b>setsebool -P
domain_can_write_kmsg 1</b></p>
<p style="margin-left:11%; margin-top: 1em">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.</p>
<p style="margin-left:11%; margin-top: 1em"><b>setsebool -P
domain_fd_use 1</b></p>
<p style="margin-left:11%; margin-top: 1em">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.</p>
<p style="margin-left:11%; margin-top: 1em"><b>setsebool -P
domain_kernel_load_modules 1</b></p>
<p style="margin-left:11%; margin-top: 1em">If you want to
allow all domains to execute in fips_mode, you must turn on
the fips_mode boolean. Enabled by default.</p>
<p style="margin-left:11%; margin-top: 1em"><b>setsebool -P
fips_mode 1</b></p>
<p style="margin-left:11%; margin-top: 1em">If you want to
enable reading of urandom for all domains, you must turn on
the global_ssp boolean. Disabled by default.</p>
<p style="margin-left:11%; margin-top: 1em"><b>setsebool -P
global_ssp 1</b></p>
<h2>MANAGED FILES
<a name="MANAGED FILES"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">The SELinux
process type sandbox_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.</p>
<p style="margin-left:11%; margin-top: 1em"><b>sandbox_file_t</b></p>
<p style="margin-left:11%; margin-top: 1em"><b>sandbox_tmpfs_type</b></p>
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<p>all sandbox content in tmpfs file systems</p></td></tr>
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<h2>FILE CONTEXTS
<a name="FILE CONTEXTS"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">SELinux
requires files to have an extended attribute to define the
file type.</p>
<p style="margin-left:11%; margin-top: 1em">You can see the
context of a file using the <b>−Z</b> option to
<b>ls</b></p>
<p style="margin-left:11%; margin-top: 1em">Policy governs
the access confined processes have to these files. SELinux
sandbox policy is very flexible allowing users to setup
their sandbox processes in as secure a method as
possible.</p>
<p style="margin-left:11%; margin-top: 1em"><b>STANDARD
FILE CONTEXT</b></p>
<p style="margin-left:11%; margin-top: 1em">SELinux defines
the file context types for the sandbox, 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.</p>
<p style="margin-left:11%; margin-top: 1em"><b>semanage
fcontext -a -t sandbox_xserver_tmpfs_t
’/srv/mysandbox_content(/.*)?’ <br>
restorecon -R -v /srv/mysandbox_content</b></p>
<p style="margin-left:11%; margin-top: 1em">Note: SELinux
often uses regular expressions to specify labels that match
multiple files.</p>
<p style="margin-left:11%; margin-top: 1em"><i>The
following file types are defined for sandbox:</i></p>
<p style="margin-left:11%; margin-top: 1em"><b>sandbox_devpts_t</b></p>
<p style="margin-left:11%; margin-top: 1em">- Set files
with the sandbox_devpts_t type, if you want to treat the
files as sandbox devpts data.</p>
<p style="margin-left:11%; margin-top: 1em"><b>sandbox_exec_t</b></p>
<p style="margin-left:11%; margin-top: 1em">- Set files
with the sandbox_exec_t type, if you want to transition an
executable to the sandbox_t domain.</p>
<p style="margin-left:11%; margin-top: 1em"><b>sandbox_file_t</b></p>
<p style="margin-left:11%; margin-top: 1em">- Set files
with the sandbox_file_t type, if you want to treat the files
as sandbox content.</p>
<p style="margin-left:11%; margin-top: 1em"><b>sandbox_min_client_tmpfs_t</b></p>
<p style="margin-left:11%; margin-top: 1em">- Set files
with the sandbox_min_client_tmpfs_t type, if you want to
store sandbox min client files on a tmpfs file system.</p>
<p style="margin-left:11%; margin-top: 1em"><b>sandbox_net_client_tmpfs_t</b></p>
<p style="margin-left:11%; margin-top: 1em">- Set files
with the sandbox_net_client_tmpfs_t type, if you want to
store sandbox net client files on a tmpfs file system.</p>
<p style="margin-left:11%; margin-top: 1em"><b>sandbox_web_client_tmpfs_t</b></p>
<p style="margin-left:11%; margin-top: 1em">- Set files
with the sandbox_web_client_tmpfs_t type, if you want to
store sandbox web client files on a tmpfs file system.</p>
<p style="margin-left:11%; margin-top: 1em"><b>sandbox_x_client_tmpfs_t</b></p>
<p style="margin-left:11%; margin-top: 1em">- Set files
with the sandbox_x_client_tmpfs_t type, if you want to store
sandbox x client files on a tmpfs file system.</p>
<p style="margin-left:11%; margin-top: 1em"><b>sandbox_xserver_tmpfs_t</b></p>
<p style="margin-left:11%; margin-top: 1em">- Set files
with the sandbox_xserver_tmpfs_t type, if you want to store
sandbox xserver files on a tmpfs file system.</p>
<p style="margin-left:11%; margin-top: 1em">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 <b>semanage fcontext</b> command. This will
modify the SELinux labeling database. You will need to use
<b>restorecon</b> to apply the labels.</p>
<h2>COMMANDS
<a name="COMMANDS"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em"><b>semanage
fcontext</b> can also be used to manipulate default file
context mappings.</p>
<p style="margin-left:11%; margin-top: 1em"><b>semanage
permissive</b> can also be used to manipulate whether or not
a process type is permissive.</p>
<p style="margin-left:11%; margin-top: 1em"><b>semanage
module</b> can also be used to enable/disable/install/remove
policy modules.</p>
<p style="margin-left:11%; margin-top: 1em"><b>semanage
boolean</b> can also be used to manipulate the booleans</p>
<p style="margin-left:11%; margin-top: 1em"><b>system-config-selinux</b>
is a GUI tool available to customize SELinux policy
settings.</p>
<h2>AUTHOR
<a name="AUTHOR"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">This manual
page was auto-generated using <b>sepolicy manpage .</b></p>
<h2>SEE ALSO
<a name="SEE ALSO"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">selinux(8),
sandbox(8), semanage(8), restorecon(8), chcon(1),
sepolicy(8) , setsebool(8), sandbox_min_selinux(8),
sandbox_min_selinux(8), sandbox_min_client_selinux(8),
sandbox_min_client_selinux(8), sandbox_net_selinux(8),
sandbox_net_selinux(8), sandbox_net_client_selinux(8),
sandbox_net_client_selinux(8), sandbox_web_selinux(8),
sandbox_web_selinux(8), sandbox_web_client_selinux(8),
sandbox_web_client_selinux(8), sandbox_x_selinux(8),
sandbox_x_selinux(8), sandbox_x_client_selinux(8),
sandbox_x_client_selinux(8), sandbox_xserver_selinux(8),
sandbox_xserver_selinux(8)</p>
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