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/usr/share/doc/pam/txts

Name	Size	Mode	Actions
README.pam_access	5253	0644	edit dl rm
README.pam_chroot	1510	0644	edit dl rm
README.pam_console	1925	0644	edit dl rm
README.pam_cracklib	9757	0644	edit dl rm
README.pam_debug	1995	0644	edit dl rm
README.pam_deny	1035	0644	edit dl rm
README.pam_echo	1100	0644	edit dl rm
README.pam_env	3627	0644	edit dl rm
README.pam_exec	2230	0644	edit dl rm
README.pam_faildelay	827	0644	edit dl rm
README.pam_faillock	6062	0644	edit dl rm
README.pam_filter	3102	0644	edit dl rm
README.pam_ftp	1699	0644	edit dl rm
README.pam_group	2175	0644	edit dl rm
README.pam_issue	1356	0644	edit dl rm
README.pam_keyinit	2245	0644	edit dl rm
README.pam_lastlog	2597	0644	edit dl rm
README.pam_limits	2421	0644	edit dl rm
README.pam_listfile	3626	0644	edit dl rm
README.pam_localuser	1167	0644	edit dl rm
README.pam_loginuid	1117	0644	edit dl rm
README.pam_mail	2009	0644	edit dl rm
README.pam_mkhomedir	1361	0644	edit dl rm
README.pam_motd	2588	0644	edit dl rm
README.pam_namespace	11543	0644	edit dl rm
README.pam_nologin	1348	0644	edit dl rm
README.pam_permit	907	0644	edit dl rm
README.pam_postgresok	346	0644	edit dl rm
README.pam_pwhistory	2243	0644	edit dl rm
README.pam_rhosts	1882	0644	edit dl rm
README.pam_rootok	1086	0644	edit dl rm
README.pam_securetty	1342	0644	edit dl rm
README.pam_selinux	2909	0644	edit dl rm
README.pam_sepermit	1648	0644	edit dl rm
README.pam_shells	653	0644	edit dl rm
README.pam_stress	2060	0644	edit dl rm
README.pam_succeed_if	2864	0644	edit dl rm
README.pam_time	1301	0644	edit dl rm
README.pam_timestamp	1616	0644	edit dl rm
README.pam_tty_audit	2779	0644	edit dl rm
README.pam_umask	1631	0644	edit dl rm
README.pam_unix	7265	0644	edit dl rm
README.pam_userdb	2973	0644	edit dl rm
README.pam_usertype	1200	0644	edit dl rm
README.pam_warn	1224	0644	edit dl rm
README.pam_wheel	1968	0644	edit dl rm
README.pam_xauth	3695	0644	edit dl rm

Edit: /usr/share/doc/pam/txts/README.pam_group (2175B)

pam_group — PAM module for group access

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

DESCRIPTION

The pam_group PAM module does not authenticate the user, but instead it grants
group memberships (in the credential setting phase of the authentication
module) to the user. Such memberships are based on the service they are
applying for.

By default rules for group memberships are taken from config file /etc/security
/group.conf.

This module's usefulness relies on the file-systems accessible to the user. The
point being that once granted the membership of a group, the user may attempt
to create a setgid binary with a restricted group ownership. Later, when the
user is not given membership to this group, they can recover group membership
with the precompiled binary. The reason that the file-systems that the user has
access to are so significant, is the fact that when a system is mounted nosuid
the user is unable to create or execute such a binary file. For this module to
provide any level of security, all file-systems that the user has write access
to should be mounted nosuid.

The pam_group module functions in parallel with the /etc/group file. If the
user is granted any groups based on the behavior of this module, they are
granted in addition to those entries /etc/group (or equivalent).

EXAMPLES

These are some example lines which might be specified in /etc/security/
group.conf.

Running 'xsh' on tty* (any ttyXXX device), the user 'us' is given access to the
floppy (through membership of the floppy group)

xsh;tty*&!ttyp*;us;Al0000-2400;floppy

Running 'xsh' on tty* (any ttyXXX device), the users 'sword', 'pike' and
'shield' are given access to games (through membership of the floppy group)
after work hours.

xsh; tty* ;sword|pike|shield;!Wk0900-1800;games, sound
xsh; tty* ;*;Al0900-1800;floppy

Any member of the group 'admin' running 'xsh' on tty*, is granted access (at
any time) to the group 'plugdev'

xsh; tty* ;%admin;Al0000-2400;plugdev

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