passwd_selinux(8)					       SELinux Policy passwd						 passwd_selinux(8)

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. 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.  passwd policy is extremely flexible and has several booleans that allow you
       to manipulate the policy and run passwd with the tightest access possible.

       If  you want to allow users to resolve user passwd entries directly from ldap rather then using a sssd server, you must turn on the authlo-
       gin_nsswitch_use_ldap boolean. Disabled by default.

       setsebool -P authlogin_nsswitch_use_ldap 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 system to run with NIS, you must turn on the nis_enabled boolean. Disabled by default.

       setsebool -P nis_enabled 1

       If you want to allow confined applications to use nscd shared memory, you must turn on the nscd_use_shm boolean. Enabled by default.

       setsebool -P nscd_use_shm 1

       If you want to allow samba to act as the domain controller, add users, groups and change passwords, you must turn on the  samba_domain_con-
       troller boolean. Disabled by default.

       setsebool -P samba_domain_controller 1

NSSWITCH DOMAIN

       If  you	want  to  allow users to resolve user passwd entries directly from ldap rather then using a sssd server for the passwd_t, you must
       turn on the authlogin_nsswitch_use_ldap boolean.

       setsebool -P authlogin_nsswitch_use_ldap 1

       If you want to allow confined applications to run with kerberos for the passwd_t, you must turn on the kerberos_enabled boolean.

       setsebool -P kerberos_enabled 1

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.

       faillog_t

	    /var/log/btmp.*
	    /var/log/faillog.*
	    /var/log/tallylog.*
	    /var/run/faillock(/.*)?

       krb5_host_rcache_t

	    /var/cache/krb5rcache(/.*)?
	    /var/tmp/nfs_0
	    /var/tmp/DNS_25
	    /var/tmp/host_0
	    /var/tmp/imap_0
	    /var/tmp/HTTP_23
	    /var/tmp/HTTP_48
	    /var/tmp/ldap_55
	    /var/tmp/ldap_487
	    /var/tmp/ldapmap1_0

       lastlog_t

	    /var/log/lastlog.*

       passwd_file_t

	    /etc/group[-+]?
	    /etc/passwd[-+]?
	    /etc/passwd.adjunct.*
	    /etc/ptmptmp
	    /etc/.pwd.lock
	    /etc/group.lock
	    /etc/passwd.OLD
	    /etc/passwd.lock

       security_t

	    /selinux

       shadow_t

	    /etc/shadow.*
	    /etc/gshadow.*
	    /etc/nshadow.*
	    /var/db/shadow.*
	    /etc/security/opasswd
	    /etc/security/opasswd.old

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.

       STANDARD FILE CONTEXT

       SELinux defines the file context types for the passwd, if you wanted to store files with these types in a diffent paths, you need  to  exe-
       cute the semanage command to sepecify alternate labeling and then use restorecon to put the labels on disk.

       semanage fcontext -a -t passwd_exec_t '/srv/passwd/content(/.*)?'
       restorecon -R -v /srv/mypasswd_content

       Note: SELinux often uses regular expressions to specify labels that match multiple files.

       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.

       Paths:
	    /usr/bin/chage, /usr/bin/passwd

       passwd_file_t

       - Set files with the passwd_file_t type, if you want to treat the files as passwd content.

       Paths:
	    /etc/group[-+]?,	/etc/passwd[-+]?,   /etc/passwd.adjunct.*,   /etc/ptmptmp,   /etc/.pwd.lock,   /etc/group.lock,   /etc/passwd.OLD,
	    /etc/passwd.lock

       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.

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.

       semanage boolean can also be used to manipulate the booleans

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

AUTHOR

       This manual page was auto-generated using sepolicy manpage .

SEE ALSO

       selinux(8), passwd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8) , setsebool(8)

passwd								     14-06-10							 passwd_selinux(8)