fetchmail_selinux(8) SELinux Policy fetchmail fetchmail_selinux(8)NAMEfetchmail_selinux - Security Enhanced Linux Policy for the fetchmail
processes
DESCRIPTION
Security-Enhanced Linux secures the fetchmail processes via flexible
mandatory access control.
The fetchmail processes execute with the fetchmail_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 fetchmail_t
ENTRYPOINTS
The fetchmail_t SELinux type can be entered via the fetchmail_exec_t
file type.
The default entrypoint paths for the fetchmail_t domain are the follow‐
ing:
/usr/bin/fetchmail
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
fetchmail policy is very flexible allowing users to setup their fetch‐
mail processes in as secure a method as possible.
The following process types are defined for fetchmail:
fetchmail_t
Note: semanage permissive -a fetchmail_t can be used to make the
process type fetchmail_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. fetch‐
mail policy is extremely flexible and has several booleans that allow
you to manipulate the policy and run fetchmail with the tightest access
possible.
If you want to allow all daemons to write corefiles to /, you must turn
on the daemons_dump_core boolean. Disabled by default.
setsebool -P daemons_dump_core 1
If you want to enable cluster mode for daemons, you must turn on the
daemons_enable_cluster_mode boolean. Enabled by default.
setsebool -P daemons_enable_cluster_mode 1
If you want to allow all daemons to use tcp wrappers, you must turn on
the daemons_use_tcp_wrapper boolean. Disabled by default.
setsebool -P daemons_use_tcp_wrapper 1
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 allow confined applications to run with kerberos, you
must turn on the kerberos_enabled boolean. Enabled by default.
setsebool -P kerberos_enabled 1
If you want to allow confined applications to use nscd shared memory,
you must turn on the nscd_use_shm boolean. Disabled by default.
setsebool -P nscd_use_shm 1
MANAGED FILES
The SELinux process type fetchmail_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.
cluster_conf_t
/etc/cluster(/.*)?
cluster_var_lib_t
/var/lib/pcsd(/.*)?
/var/lib/cluster(/.*)?
/var/lib/openais(/.*)?
/var/lib/pengine(/.*)?
/var/lib/corosync(/.*)?
/usr/lib/heartbeat(/.*)?
/var/lib/heartbeat(/.*)?
/var/lib/pacemaker(/.*)?
cluster_var_run_t
/var/run/crm(/.*)?
/var/run/cman_.*
/var/run/rsctmp(/.*)?
/var/run/aisexec.*
/var/run/heartbeat(/.*)?
/var/run/cpglockd.pid
/var/run/corosync.pid
/var/run/rgmanager.pid
/var/run/cluster/rgmanager.sk
fetchmail_uidl_cache_t
/var/lib/fetchmail(/.*)?
/var/mail/.fetchmail-UIDL-cache
fetchmail_var_run_t
/var/run/fetchmail.*
root_t
/
/initrd
sendmail_log_t
/var/log/mail(/.*)?
/var/log/sendmail.st.*
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 fetchmail policy is very flexible allowing users to setup their
fetchmail processes in as secure a method as possible.
STANDARD FILE CONTEXT
SELinux defines the file context types for the fetchmail, 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 fetchmail_etc_t '/srv/fetchmail/content(/.*)?'
restorecon -R -v /srv/myfetchmail_content
Note: SELinux often uses regular expressions to specify labels that
match multiple files.
The following file types are defined for fetchmail:
fetchmail_etc_t
- Set files with the fetchmail_etc_t type, if you want to store fetch‐
mail files in the /etc directories.
fetchmail_exec_t
- Set files with the fetchmail_exec_t type, if you want to transition
an executable to the fetchmail_t domain.
fetchmail_home_t
- Set files with the fetchmail_home_t type, if you want to store fetch‐
mail files in the users home directory.
Paths:
/root/.fetchmailrc, /home/[^/]*/.fetchmailrc
fetchmail_initrc_exec_t
- Set files with the fetchmail_initrc_exec_t type, if you want to tran‐
sition an executable to the fetchmail_initrc_t domain.
fetchmail_log_t
- Set files with the fetchmail_log_t type, if you want to treat the
data as fetchmail log data, usually stored under the /var/log direc‐
tory.
fetchmail_uidl_cache_t
- Set files with the fetchmail_uidl_cache_t type, if you want to store
the files under the /var/cache directory.
Paths:
/var/lib/fetchmail(/.*)?, /var/mail/.fetchmail-UIDL-cache
fetchmail_var_run_t
- Set files with the fetchmail_var_run_t type, if you want to store the
fetchmail files under the /run or /var/run directory.
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), fetchmail(8), semanage(8), restorecon(8), chcon(1), sepol‐
icy(8) , setsebool(8)fetchmail 13-11-20 fetchmail_selinux(8)
