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File README.pam_group

pam_group — PAM module for group access

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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

Name	Type	Size	Permission	Last Modified	Actions
.	DIR	-	drwxr-xr-x	2025-08-28 10:58:24
..	DIR	-	drwxr-xr-x	2025-08-28 10:58:24
README.pam_access	text/plain	5.13 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_chroot	text/plain	1.47 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_console	text/plain	1.88 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_cracklib	text/plain	9.53 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_debug	text/plain	1.95 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_deny	text/plain	1.01 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_echo	text/plain	1.07 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_env	text/plain	3.54 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_exec	text/plain	2.18 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_faildelay	text/plain	827 B	-rw-r--r--	2025-08-26 08:58:55
README.pam_faillock	text/plain	5.92 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_filter	text/plain	3.03 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_ftp	text/plain	1.66 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_group	text/plain	2.12 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_issue	text/plain	1.32 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_keyinit	text/plain	2.19 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_lastlog	text/plain	2.54 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_limits	text/plain	2.36 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_listfile	text/plain	3.54 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_localuser	text/plain	1.14 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_loginuid	text/plain	1.09 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_mail	text/plain	1.96 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_mkhomedir	text/plain	1.33 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_motd	text/plain	2.53 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_namespace	text/plain	11.27 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_nologin	text/plain	1.32 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_permit	text/plain	907 B	-rw-r--r--	2025-08-26 08:58:55
README.pam_postgresok	text/plain	346 B	-rw-r--r--	2025-08-26 08:58:55
README.pam_pwhistory	text/plain	2.19 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_rhosts	text/plain	1.84 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_rootok	text/plain	1.06 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_securetty	text/plain	1.31 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_selinux	text/plain	2.84 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_sepermit	text/plain	1.61 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_shells	text/plain	653 B	-rw-r--r--	2025-08-26 08:58:55
README.pam_stress	text/plain	2.01 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_succeed_if	text/plain	2.8 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_time	text/plain	1.27 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_timestamp	text/plain	1.58 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_tty_audit	text/plain	2.71 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_umask	text/plain	1.59 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_unix	text/plain	7.09 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_userdb	text/plain	2.9 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_usertype	text/plain	1.17 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_warn	text/plain	1.2 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_wheel	text/plain	1.92 KB	-rw-r--r--	2025-08-26 08:58:55
README.pam_xauth	text/plain	3.61 KB	-rw-r--r--	2025-08-26 08:58:55

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