An XCCDF Group - A logical subset of the XCCDF Benchmark
/etc/issue
You are accessing a U.S. Government (USG) Information System (IS) that is provided for USG-authorized use only. By using this IS (which includes any device attached to this IS), you consent to the following conditions: -The USG routinely intercepts and monitors communications on this IS for purposes including, but not limited to, penetration testing, COMSEC monitoring, network operations and defense, personnel misconduct (PM), law enforcement (LE), and counterintelligence (CI) investigations. -At any time, the USG may inspect and seize data stored on this IS. -Communications using, or data stored on, this IS are not private, are subject to routine monitoring, interception, and search, and may be disclosed or used for any USG-authorized purpose. -This IS includes security measures (e.g., authentication and access controls) to protect USG interests -- not for your personal benefit or privacy. -Notwithstanding the above, using this IS does not constitute consent to PM, LE or CI investigative searching or monitoring of the content of privileged communications, or work product, related to personal representation or services by attorneys, psychotherapists, or clergy, and their assistants. Such communications and work product are private and confidential. See User Agreement for details.
I've read & consent to terms in IS user agreem't.
/etc/motd
$ sudo chgrp root /etc/issue
$ sudo chgrp root /etc/motd
$ sudo chown root /etc/issue
$ sudo chown root /etc/motd
$ sudo chmod 0644 /etc/issue
$ sudo chmod 0644 /etc/motd
/etc/pam.d
/etc/pam.d/login
/etc/pam.d/system-auth
/etc/security/opasswd
$ sudo grep pam_succeed_if /etc/pam.d/sudo
pam_lastlog
/etc/pam.d/postlogin
showfailed
session [default=1] pam_lastlog.so showfailed
silent
pam_faillock
/usr/share/doc/pam-VERSION/txts/README.pam_faillock
remember
pam_pwhistory
authselect
authselect enable-feature with-pwhistory
/etc/security/pwhistory.conf
pam_pwquality
pam_pwquality(8)
pam_cracklib
password requisite pam_cracklib.so try_first_pass retry=3
password required pam_cracklib.so try_first_pass retry=3 maxrepeat=3 minlen=14 dcredit=-1 ucredit=-1 ocredit=-1 lcredit=-1 difok=4
password requisite pam_pwquality.so try_first_pass local_users_only retry=3 authtok_type=
/etc/security/pwquality.conf
difok = 4 minlen = 14 dcredit = -1 ucredit = -1 lcredit = -1 ocredit = -1 maxrepeat = 3
minclass
* Upper-case characters * Lower-case characters * Digits * Special characters (for example, punctuation)
minlen
minlen=
pam_pwquality.so
retry=
/etc/shadow
password
pam_unix.so
sha512
password sufficient pam_unix.so sha512 other arguments...
/usr/lib/systemd/system/emergency.service
/usr/lib/systemd/system/rescue.service
cac
default
other
/etc/passwd
^(bin|oracle|sapadm)$
root
NUM_DAYS
USER
$ sudo chage -I NUM_DAYS USER
-E
/etc/default/useradd
INACTIVE=
useradd
$ sudo getent passwd | awk -F: '{ print $1}' | uniq -d
/etc/login.defs
passwd
su
login
login.defs(5)
PASS_MAX_DAYS
-M
PASS_MIN_DAYS
-m
PASS_WARN_AGE
-W
$ sudo chage -M 180 -m 7 -W 7 USER
PASS_MIN_LEN
15
12
$ sudo chage -M USER
$ sudo chage -m 1 USER
/etc/pam.d/password-auth
x
*
nullok
$ sudo awk -F: '!$2 {print $1}' /etc/shadow
$ sudo passwd [username]
$ sudo passwd -l [username]
.netrc
sudo
/etc/securetty
/dev/console
/dev/tty*
/dev/vc/*
$ sudo echo > /etc/securetty
1000
$ sudo usermod -s /sbin/nologin account
ttyS0 ttyS1
vc/1 vc/2 vc/3 vc/4
wheel
/etc/pam.d/su
auth required pam_wheel.so use_uid
FAIL_DELAY
/etc/security/limits.conf
/etc/security/limits.d/
* hard maxlogins
$ sudo mkdir --mode 000 /tmp/tmp-inst
/etc/security/namespace.conf
/tmp /tmp/tmp-inst/ level root,adm
$ sudo mkdir --mode 000 /var/tmp/tmp-inst
/var/tmp /var/tmp/tmp-inst/ level root,adm
TMOUT
/etc/profile
/etc/profile.d/tmout.sh
typeset -xr TMOUT=
declare -xr TMOUT=
typeset
$ sudo chgrp USER_GROUP /home/USER
$ sudo chown USER /home/USER
# ls -ld /home/USER
# chmod g-w /home/USER # chmod o-rwx /home/USER
# echo $PATH
.
# ls -ld DIR
..
/
PATH=:/bin PATH=/bin: PATH=/bin::/sbin
umask
/etc/bashrc
UMASK
/etc/profile.d