cyrus_selinux(8) - Linux man page

Name

cyrus_selinux - Security Enhanced Linux Policy for the cyrus processes

Description

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

The cyrus processes execute with the cyrus_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 cyrus_t

Entrypoints

The cyrus_t SELinux type can be entered via the "cyrus_exec_t" file type. The default entrypoint paths for the cyrus_t domain are the following:"

/usr/lib(64)?/cyrus-imapd/cyrus-master

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 cyrus policy is very flexible allowing users to setup their cyrus processes in as secure a method as possible.

The following process types are defined for cyrus:

cyrus_t

Note: semanage permissive -a cyrus_t

can be used to make the process type cyrus_t permissive. Permissive process types are not denied access by SELinux. AVC messages will still be generated.

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 cyrus policy is very flexible allowing users to setup their cyrus processes in as secure a method as possible.

The following file types are defined for cyrus:

cyrus_exec_t

- Set files with the cyrus_exec_t type, if you want to transition an executable to the cyrus_t domain.

cyrus_initrc_exec_t

- Set files with the cyrus_initrc_exec_t type, if you want to transition an executable to the cyrus_initrc_t domain.

cyrus_keytab_t

- Set files with the cyrus_keytab_t type, if you want to treat the files as kerberos keytab files.

cyrus_tmp_t

- Set files with the cyrus_tmp_t type, if you want to store cyrus temporary files in the /tmp directories.

cyrus_var_lib_t

- Set files with the cyrus_var_lib_t type, if you want to store the cyrus files under the /var/lib directory.

cyrus_var_run_t

- Set files with the cyrus_var_run_t type, if you want to store the cyrus files under the /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 database. You will need to use restorecon to apply the labels.

Managed Files

The SELinux process type cyrus_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.

cyrus_tmp_t

cyrus_var_lib_t

/var/lib/imap(/.*)?

cyrus_var_run_t
initrc_tmp_t
mail_spool_t

/var/mail(/.*)?

/var/spool/imap(/.*)?

/var/spool/mail(/.*)?

mnt_t

/mnt(/[^/]*)

/mnt(/[^/]*)?

/rhev(/[^/]*)?

/media(/[^/]*)

/media(/[^/]*)?

/etc/rhgb(/.*)?

/media/.hal-.*

/net

/afs

/misc

/rhev

root_t

/initrd

tmp_t

/tmp

/usr/tmp

/var/tmp

/var/tmp/vi.recover

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.

system-config-selinux is a GUI tool available to customize SELinux policy settings.

Author

This manual page was auto-generated using sepolicy manpage by mgrepl.