ldconfig_selinux(8) SELinux Policy ldconfig ldconfig_selinux(8)NAMEldconfig_selinux - Security Enhanced Linux Policy for the ldconfig pro‐
cesses
DESCRIPTION
Security-Enhanced Linux secures the ldconfig processes via flexible
mandatory access control.
The ldconfig processes execute with the ldconfig_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 ldconfig_t
ENTRYPOINTS
The ldconfig_t SELinux type can be entered via the ldconfig_exec_t file
type.
The default entrypoint paths for the ldconfig_t domain are the follow‐
ing:
/sbin/ldconfig, /usr/sbin/ldconfig
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
ldconfig policy is very flexible allowing users to setup their ldconfig
processes in as secure a method as possible.
The following process types are defined for ldconfig:
ldconfig_t
Note: semanage permissive -a ldconfig_t can be used to make the process
type ldconfig_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. ldcon‐
fig policy is extremely flexible and has several booleans that allow
you to manipulate the policy and run ldconfig with the tightest access
possible.
If you want to allow all daemons the ability to read/write terminals,
you must turn on the daemons_use_tty boolean. Disabled by default.
setsebool -P daemons_use_tty 1
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
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
MANAGED FILES
The SELinux process type ldconfig_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.
kdumpctl_tmp_t
ld_so_cache_t
/etc/ld.so.cache
/etc/ld.so.cache~
/etc/ld.so.preload
/etc/ld.so.preload~
ldconfig_cache_t
/var/cache/ldconfig(/.*)?
ldconfig_tmp_t
rpm_script_tmp_t
user_home_t
/home/[^/]*/.+
user_tmp_t
/var/run/user(/.*)?
/tmp/gconfd-.*
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 ldconfig policy is very flexible allowing users to setup their
ldconfig processes in as secure a method as possible.
STANDARD FILE CONTEXT
SELinux defines the file context types for the ldconfig, 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 ldconfig_cache_t '/srv/ldconfig/content(/.*)?'
restorecon -R -v /srv/myldconfig_content
Note: SELinux often uses regular expressions to specify labels that
match multiple files.
The following file types are defined for ldconfig:
ldconfig_cache_t
- Set files with the ldconfig_cache_t type, if you want to store the
files under the /var/cache directory.
ldconfig_exec_t
- Set files with the ldconfig_exec_t type, if you want to transition an
executable to the ldconfig_t domain.
Paths:
/sbin/ldconfig, /usr/sbin/ldconfig
ldconfig_tmp_t
- Set files with the ldconfig_tmp_t type, if you want to store ldconfig
temporary files in the /tmp directories.
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), ldconfig(8), semanage(8), restorecon(8), chcon(1), sepol‐
icy(8) , setsebool(8)ldconfig 13-11-20 ldconfig_selinux(8)