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/issue.net
/etc/motd
$ sudo chgrp root /etc/issue
$ sudo chgrp root /etc/issue.net
$ sudo chgrp root /etc/motd
$ sudo chown root /etc/issue
$ sudo chown root /etc/issue.net
$ sudo chown root /etc/motd
$ sudo chmod 0644 /etc/issue
$ sudo chmod 0644 /etc/issue.net
$ sudo chmod 0644 /etc/motd
banner-message-enable
true
/etc/dconf/db/gdm.d/00-security-settings
[org/gnome/login-screen] banner-message-enable=true
/etc/dconf/db/gdm.d/locks/00-security-settings-lock
/org/gnome/login-screen/banner-message-enable
dconf update
banner-message-text
'APPROVED_BANNER'
/etc/gdm3/greeter.dconf-defaults
[org/gnome/login-screen] banner-message-text='APPROVED_BANNER'
'
\n
/etc/pam.d
/etc/pam.d/login
/etc/pam.d/system-auth
/etc/security/opasswd
libpam-pwquality
$ apt-get install libpam-pwquality
$ sudo grep pam_succeed_if /etc/pam.d/sudo
pam_lastlog
showfailed
session required pam_lastlog.so showfailed
silent
pam_faillock
/usr/share/doc/pam-VERSION/txts/README.pam_faillock
remember
pam_pwhistory
/etc/pam.d/common-password
use_authtok
password requisite pam_pwhistory.so ...existing_options... remember= use_authtok
pam_unix
pam_faildelay
/etc/pam.d/common-auth
delay
auth required pam_faildelay.so delay=
pam_faillock.so
/etc/security/faillock.conf
deny = <count>
fail_interval
fail_interval = <interval-in-seconds>
interval-in-seconds
authselect
authconfig
unlock_time=<interval-in-seconds>
unlock_time
0
faillock
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
dcredit
dictcheck
1
difok
$ grep -i enforcing /etc/security/pwquality.conf enforcing = 1
lcredit
minclass
* Upper-case characters * Lower-case characters * Digits * Special characters (for example, punctuation)
minlen
minlen=
ocredit=
ocredit
pam_pwquality.so
retry=
ucredit=
ucredit
/etc/shadow
/etc/login.defs
ENCRYPT_METHOD
SystemD
Ctrl-Alt-Del
CtrlAltDelBurstAction
/etc/systemd/system.conf
CtrlAltDelBurstAction=none
ln -sf /dev/null /etc/systemd/system/ctrl-alt-del.target
systemctl mask ctrl-alt-del.target
/usr/lib/systemd/system/ctrl-alt-del.service
vlock
$ apt-get install vlock
cac
default
other
opensc-pkcs11
$ apt-get install opensc-pkcs11
libpam-pkcs11
$ apt-get install libpam-pkcs11
cert_policy
/etc/pam_pkcs11/pam_pkcs11.conf
ca
cert_policy = ca, ocsp_on, signature;
ocsp_on
crl_auto
crl_offline
cert_policy = ca,signature,ocsp_on,crl_auto;
pam_pkcs11.so
etc/pam.d/common-auth
# grep pam_pkcs11.so /etc/pam.d/common-auth auth [success=2 default=ignore] pam_pkcs11.so
use_mappers
pwent
$ grep ^use_mappers /etc/pam_pkcs11/pam_pkcs11.conf use_mappers = pwent
/etc/passwd
^(bin|oracle|sapadm)$
root
NUM_DAYS
USER
$ sudo chage -I NUM_DAYS USER
-E
/etc/default/useradd
INACTIVE=
useradd
YYYY-MM-DD
$ sudo chage -E YYYY-MM-DD USER
$ sudo getent passwd | awk -F: '{ print $1}' | uniq -d
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
*
$ sudo cut -d: -f2 /etc/shadow $6$kcOnRq/5$NUEYPuyL.wghQwWssXRcLRFiiru7f5JPV6GaJhNC2aK5F3PZpE/BCCtwrxRc/AInKMNX3CdMw11m9STiql12f/
!
$6
nullok
$ sudo awk -F: '!$2 {print $1}' /etc/shadow
$ sudo passwd [username]
$ sudo passwd -l [username]
.forward
.netrc
sudo
/etc/securetty
/dev/console
/dev/tty*
/dev/vc/*
var_pam_wheel_group_for_su
pam_wheel.so
group
/etc/pam.d/su
$ sudo echo > /etc/securetty
1000
halt
sync
shutdown
nfsnobody
$ sudo usermod -L account
$ sudo usermod -s /sbin/nologin account
$ sudo passwd -l root
ttyS0 ttyS1
vc/1 vc/2 vc/3 vc/4
auth required pam_wheel.so use_uid group=
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
TMOUT=
$ sudo chgrp USER_GROUP /home/USER/.INIT_FILE
$ sudo chown USER /home/USER/.*
$ sudo mkdir /home/USER
$ sudo chgrp USER_GROUP /home/USER
$ sudo chown USER /home/USER
0750
$ sudo chmod 0750 /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
/etc/csh.cshrc
UMASK
/etc/profile.d