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<title>system_cronjob_selinux</title>
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<h1 align="center">system_cronjob_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="#BOOLEANS">BOOLEANS</a><br>
<a href="#MANAGED FILES">MANAGED FILES</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">system_cronjob_selinux
− Security Enhanced Linux Policy for the
system_cronjob processes</p>
<h2>DESCRIPTION
<a name="DESCRIPTION"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">Security-Enhanced
Linux secures the system_cronjob processes via flexible
mandatory access control.</p>
<p style="margin-left:11%; margin-top: 1em">The
system_cronjob processes execute with the system_cronjob_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 system_cronjob_t</b></p>
<h2>ENTRYPOINTS
<a name="ENTRYPOINTS"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">The
system_cronjob_t SELinux type can be entered via the
<b>system_cron_spool_t, bin_t, anacron_exec_t, usr_t,
shell_exec_t, fusefs_t, nfs_t, cifs_t</b> file types.</p>
<p style="margin-left:11%; margin-top: 1em">The default
entrypoint paths for the system_cronjob_t domain are the
following:</p>
<p style="margin-left:11%; margin-top: 1em">All executables
with the default executable label, usually stored in
/usr/bin and /usr/sbin. /etc/cron.d(/.*)?,
/var/spool/anacron(/.*)?, /etc/crontab,
/var/spool/fcron/systab, /var/spool/fcron/new.systab,
/var/spool/fcron/systab.orig, /usr/sbin/anacron, /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, /bin/d?ash, /bin/ksh.*, /bin/zsh.*,
/usr/bin/d?ash, /usr/bin/ksh.*, /usr/bin/zsh.*, /bin/esh,
/bin/bash, /bin/fish, /bin/mksh, /bin/sash, /bin/tcsh,
/bin/yash, /bin/bash2, /usr/bin/esh, /sbin/nologin,
/usr/bin/bash, /usr/bin/fish, /usr/bin/mksh, /usr/bin/sash,
/usr/bin/tcsh, /usr/bin/yash, /usr/bin/bash2,
/usr/sbin/sesh, /usr/sbin/smrsh, /usr/bin/scponly,
/usr/libexec/sesh, /usr/sbin/nologin, /usr/bin/git-shell,
/usr/sbin/scponlyc, /usr/libexec/sudo/sesh,
/usr/bin/cockpit-bridge, /usr/libexec/cockpit-agent,
/usr/libexec/git-core/git-shell,
/var/run/user/[0-9]+/gvfs</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
system_cronjob policy is very flexible allowing users to
setup their system_cronjob processes in as secure a method
as possible.</p>
<p style="margin-left:11%; margin-top: 1em">The following
process types are defined for system_cronjob:</p>
<p style="margin-left:11%; margin-top: 1em"><b>system_cronjob_t</b></p>
<p style="margin-left:11%; margin-top: 1em">Note:
<b>semanage permissive -a system_cronjob_t</b> can be used
to make the process type system_cronjob_t permissive.
SELinux does not deny access to permissive process types,
but the AVC (SELinux denials) messages are still
generated.</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.
system_cronjob policy is extremely flexible and has several
booleans that allow you to manipulate the policy and run
system_cronjob with the tightest access possible.</p>
<p style="margin-left:11%; margin-top: 1em">If you want to
allow system cron jobs to relabel filesystem for restoring
file contexts, you must turn on the cron_can_relabel
boolean. Disabled by default.</p>
<p style="margin-left:11%; margin-top: 1em"><b>setsebool -P
cron_can_relabel 1</b></p>
<p style="margin-left:11%; margin-top: 1em">If you want to
allow system cronjob to be executed on on NFS, CIFS or FUSE
filesystem, you must turn on the
cron_system_cronjob_use_shares boolean. Disabled by
default.</p>
<p style="margin-left:11%; margin-top: 1em"><b>setsebool -P
cron_system_cronjob_use_shares 1</b></p>
<p style="margin-left:11%; margin-top: 1em">If you want to
dontaudit all daemons scheduling requests (setsched,
sys_nice), you must turn on the daemons_dontaudit_scheduling
boolean. Enabled by default.</p>
<p style="margin-left:11%; margin-top: 1em"><b>setsebool -P
daemons_dontaudit_scheduling 1</b></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. Disabled 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
control the ability to mmap a low area of the address space,
as configured by /proc/sys/vm/mmap_min_addr, you must turn
on the mmap_low_allowed boolean. Disabled by default.</p>
<p style="margin-left:11%; margin-top: 1em"><b>setsebool -P
mmap_low_allowed 1</b></p>
<p style="margin-left:11%; margin-top: 1em">If you want to
allow system to run with NIS, you must turn on the
nis_enabled boolean. Disabled by default.</p>
<p style="margin-left:11%; margin-top: 1em"><b>setsebool -P
nis_enabled 1</b></p>
<p style="margin-left:11%; margin-top: 1em">If you want to
disable kernel module loading, you must turn on the
secure_mode_insmod boolean. Disabled by default.</p>
<p style="margin-left:11%; margin-top: 1em"><b>setsebool -P
secure_mode_insmod 1</b></p>
<p style="margin-left:11%; margin-top: 1em">If you want to
allow unconfined executables to make their heap memory
executable. Doing this is a really bad idea. Probably
indicates a badly coded executable, but could indicate an
attack. This executable should be reported in bugzilla, you
must turn on the selinuxuser_execheap boolean. Disabled by
default.</p>
<p style="margin-left:11%; margin-top: 1em"><b>setsebool -P
selinuxuser_execheap 1</b></p>
<p style="margin-left:11%; margin-top: 1em">If you want to
allow unconfined executables to make their stack executable.
This should never, ever be necessary. Probably indicates a
badly coded executable, but could indicate an attack. This
executable should be reported in bugzilla, you must turn on
the selinuxuser_execstack boolean. Enabled by default.</p>
<p style="margin-left:11%; margin-top: 1em"><b>setsebool -P
selinuxuser_execstack 1</b></p>
<h2>MANAGED FILES
<a name="MANAGED FILES"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">The SELinux
process type system_cronjob_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>file_type</b></p>
<p style="margin-left:11%; margin-top: 1em">all files on
the system</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),
system_cronjob(8), semanage(8), restorecon(8), chcon(1),
sepolicy(8), setsebool(8)</p>
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