passwd_selinux(8) - Linux man page

Name

passwd_selinux - Security Enhanced Linux Policy for the passwd processes

Description

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

The passwd processes execute with the passwd_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 passwd_t

Entrypoints

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

/usr/bin/chage, /usr/bin/passwd

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

The following process types are defined for passwd:

passwd_t

Note: semanage permissive -a passwd_t

can be used to make the process type passwd_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 passwd policy is very flexible allowing users to setup their passwd processes in as secure a method as possible.

The following file types are defined for passwd:

passwd_exec_t

- Set files with the passwd_exec_t type, if you want to transition an executable to the passwd_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 database. You will need to use restorecon to apply the labels.

Managed Files

The SELinux process type passwd_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.

etc_t

/etc/.*

/var/db/.*.db

/usr/etc(/.*)?

/var/ftp/etc(/.*)?

/usr/local/etc(/.*)?

/var/lib/openshift/.limits.d(/.*)?

/var/lib/openshift/.openshift-proxy.d(/.*)?

/var/lib/openshift/.stickshift-proxy.d(/.*)?

/var/lib/stickshift/.limits.d(/.*)?

/var/lib/stickshift/.stickshift-proxy.d(/.*)?

/var/named/chroot/etc(/.*)?

/etc/ipsec.d/examples(/.*)?

/var/spool/postfix/etc(/.*)?

/etc

/etc/localtime

/etc/cups/client.conf

faillog_t

/var/log/btmp.*

/var/log/faillog.*

/var/log/tallylog.*

/var/run/faillock(/.*)?

initrc_tmp_t
mnt_t

/mnt(/[^/]*)

/mnt(/[^/]*)?

/rhev(/[^/]*)?

/media(/[^/]*)

/media(/[^/]*)?

/etc/rhgb(/.*)?

/media/.hal-.*

/net

/afs

/misc

/rhev

pcscd_var_run_t

/var/run/pcscd.events(/.*)?

/var/run/pcscd.pid

/var/run/pcscd.pub

/var/run/pcscd.comm

security_t
shadow_t

/etc/shadow.*

/etc/gshadow.*

/var/db/shadow.*

/etc/passwd.adjunct.*

/etc/.pwd.lock

/etc/group.lock

/etc/passwd.lock

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.