NAME¶

unconfined_execmem_selinux - Security Enhanced Linux Policy for the unconfined_execmem processes

DESCRIPTION¶

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

The unconfined_execmem processes execute with the unconfined_execmem_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 unconfined_execmem_t

ENTRYPOINTS¶

The unconfined_execmem_t SELinux type can be entered via the execmem_exec_t, file_type, xsession_exec_t, unlabeled_t, proc_type, filesystem_type, mtrr_device_t, sysctl_type, openoffice_exec_t, nsplugin_exec_t file types.

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

/usr/lib(64)?/ghc-[^/]+/ghc.*, /usr/lib(64)/virtualbox/VirtualBox, /usr/lib(64)?/gimp/2.0/plug-ins/help-browser, /usr/lib(64)?/chromium-browser/chromium-browser, /opt/real/(.*/)?realplay.bin, /opt/Adobe.*AIR/.*/Resources/Adobe.AIR.Updater, /opt/Adobe.*AIR/.*/Resources/Adobe.AIR.Application, /usr/sbin/VBox.*, /usr/bin/haddock.*, /usr/libexec/ghc-[^/]+/.*bin, /usr/libexec/ghc-[^/]+/ghc.*, /usr/lib/wingide-[^/]+/bin/PyCore/python, /usr/lib/erlang/erts-[^/]+/bin/beam.smp, /usr/lib/thunderbird-[^/]+/thunderbird-bin, /usr/lib64/erlang/erts-[^/]+/bin/beam.smp, /usr/bin/sbcl, /usr/bin/darcs, /usr/bin/skype, /usr/bin/dosbox, /usr/bin/runghc, /usr/bin/hasktags, /usr/bin/valgrind, /usr/bin/aticonfig, /usr/bin/runhaskell, /usr/lib/R/bin/exec/R, /usr/lib64/R/bin/exec/R, /usr/sbin/vboxadd-service, /opt/google/chrome/chrome, /usr/lib/ia32el/ia32x_loader, /opt/likewise/bin/domainjoin-cli, /opt/google/chrome/google-chrome, /opt/real/RealPlayer/realplay.bin, /usr/local/RealPlayer/realplay.bin, /opt/Komodo-Edit-5/lib/mozilla/komodo-bin, all files on the system, /etc/kde3?/kdm/Xreset, /etc/kde3?/kdm/Xstartup, /etc/kde3?/kdm/Xsession, /etc/X11/[wx]dm/Xreset.*, /etc/X11/[wxg]dm/Xsession, /etc/X11/Xsession[^/]*, /etc/X11/wdm/Xsetup.*, /etc/X11/wdm/Xstartup.*, /dev/cpu/mtrr, /opt/openoffice.org.*/program/.+.bin, /usr/lib/openoffice.org.*/program/.+.bin, /usr/lib64/openoffice.org.*/program/.+.bin, /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 unconfined_execmem policy is very flexible allowing users to setup their unconfined_execmem processes in as secure a method as possible.

The following process types are defined for unconfined_execmem:

unconfined_execmem_t

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

If you want to allow direct login to the console device. Required for System 390, you must turn on the allow_console_login boolean. Enabled by default.

setsebool -P allow_console_login 1

If you want to allow all daemons the ability to read/write terminals, you must turn on the allow_daemons_use_tty boolean. Disabled by default.

setsebool -P allow_daemons_use_tty 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 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 allow_execheap boolean. Disabled by default.

setsebool -P allow_execheap 1

If you want to allow unconfined executables 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 allow_execmem boolean. Enabled by default.

setsebool -P allow_execmem 1

If you want to allow all unconfined executables to use libraries requiring text relocation that are not labeled textrel_shlib_t), you must turn on the allow_execmod boolean. Enabled by default.

setsebool -P allow_execmod 1

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 allow_execstack boolean. Enabled by default.

setsebool -P allow_execstack 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 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. Enabled 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 certain domains to map low memory in the kernel, you must turn on the mmap_low_allowed boolean. Disabled by default.

setsebool -P mmap_low_allowed 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 enabling secure mode disallows programs, such as newrole, from transitioning to administrative user domains, you must turn on the secure_mode boolean. Disabled by default.

setsebool -P secure_mode 1

If you want to boolean to determine whether the system permits loading policy, setting enforcing mode, and changing boolean values. Set this to true and you have to reboot to set it back, you must turn on the secure_mode_policyload boolean. Disabled by default.

setsebool -P secure_mode_policyload 1

If you want to allow ssh logins as sysadm_r:sysadm_t, you must turn on the ssh_sysadm_login boolean. Disabled by default.

setsebool -P ssh_sysadm_login 1

If you want to allow unconfined users to transition to the Mozilla plugin domain when running xulrunner plugin-container, you must turn on the unconfined_mozilla_plugin_transition boolean. Enabled by default.

setsebool -P unconfined_mozilla_plugin_transition 1

If you want to allow regular users direct dri device access, you must turn on the user_direct_dri boolean. Enabled by default.

setsebool -P user_direct_dri 1

If you want to allow xdm logins as sysadm, you must turn on the xdm_sysadm_login boolean. Disabled by default.

setsebool -P xdm_sysadm_login 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 unconfined_execmem_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.

file_type

all files on the system

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), unconfined_execmem(8), semanage(8), restorecon(8), chcon(1) , setsebool(8)