virt_bridgehelper_selinSELinux Policy virt_bridgehvirt_bridgehelper_selinux(8)NAMEvirt_bridgehelper_selinux - Security Enhanced Linux Policy for the
virt_bridgehelper processes
DESCRIPTION
Security-Enhanced Linux secures the virt_bridgehelper processes via
flexible mandatory access control.
The virt_bridgehelper processes execute with the virt_bridgehelper_t
SELinux type. You can check if you have these processes running by exe‐
cuting the ps command with the -Z qualifier.
For example:
ps -eZ | grep virt_bridgehelper_t
ENTRYPOINTS
The virt_bridgehelper_t SELinux type can be entered via the
virt_bridgehelper_exec_t file type.
The default entrypoint paths for the virt_bridgehelper_t domain are the
following:
/usr/libexec/qemu-bridge-helper
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
virt_bridgehelper policy is very flexible allowing users to setup their
virt_bridgehelper processes in as secure a method as possible.
The following process types are defined for virt_bridgehelper:
virt_bridgehelper_t
Note: semanage permissive -a virt_bridgehelper_t can be used to make
the process type virt_bridgehelper_t permissive. SELinux does not deny
access to permissive process types, but the AVC (SELinux denials) mes‐
sages are still generated.
BOOLEANS
SELinux policy is customizable based on least access required.
virt_bridgehelper policy is extremely flexible and has several booleans
that allow you to manipulate the policy and run virt_bridgehelper with
the tightest access possible.
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.
setsebool -P deny_ptrace 1
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.
setsebool -P domain_fd_use 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
MANAGED FILES
The SELinux process type virt_bridgehelper_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.
svirt_home_t
/home/[^/]*/.libvirt/qemu(/.*)?
/home/[^/]*/.cache/libvirt/qemu(/.*)?
/home/[^/]*/.config/libvirt/qemu(/.*)?
/home/[^/]*/.local/share/gnome-boxes/images(/.*)?
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 virt_bridgehelper policy is very flexible allowing users to
setup their virt_bridgehelper processes in as secure a method as possi‐
ble.
STANDARD FILE CONTEXT
SELinux defines the file context types for the virt_bridgehelper, 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 virt_bridgehelper_exec_t '/srv/virt_bridge‐
helper/content(/.*)?'
restorecon -R -v /srv/myvirt_bridgehelper_content
Note: SELinux often uses regular expressions to specify labels that
match multiple files.
The following file types are defined for virt_bridgehelper:
virt_bridgehelper_exec_t
- Set files with the virt_bridgehelper_exec_t type, if you want to
transition an executable to the virt_bridgehelper_t domain.
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 data‐
base. 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 ALSOselinux(8), virt_bridgehelper(8), semanage(8), restorecon(8), chcon(1),
sepolicy(8) , setsebool(8)virt_bridgehelper 13-11-20 virt_bridgehelper_selinux(8)
