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6.2.3.23 Ensure login and logout events are collected

Information

Monitor login and logout events. The parameters below track changes to files associated with login/logout events.

 - /var/log/lastlog - maintain records of the last time a user successfully logged in.
 - /var/run/faillock - directory maintains records of login failures via the pam_faillock module.

Monitoring login/logout events could provide a system administrator with information associated with brute force attacks against user logins.

Solution

- Add the audit rule(s) that monitor changes to /var/log/lastlog and /var/run/faillock . The procedure adds each rule only for targets that exist, so augenrules --load does not error. Run:

#!/usr/bin/env bash

{
 [ -e /var/log/lastlog ] && printf '%s\n' "-a always,exit -S all -F path=/var/log/lastlog -F perm=wa -F key=logins"
 [ -e /var/run/faillock ] && printf '%s\n' "-a always,exit -S all -F path=/var/run/faillock -F perm=wa -F key=logins"
} >> /etc/audit/rules.d/50-login.rules

 - Merge and load the rules into active configuration:

# augenrules --load

 - Check if reboot is required:

# if [[ $(auditctl -s | grep "enabled") =~ "2" ]]; then printf "Reboot required to load rules\n"; fi

See Also

https://workbench.cisecurity.org/benchmarks/27892

Item Details

Category: AUDIT AND ACCOUNTABILITY

References: 800-53|AU-3, 800-53|AU-3(1), 800-53|AU-7, 800-53|AU-12, 800-53|AU-12a., CSCv7|4.9, CSCv7|16.11, CSCv7|16.13

Plugin: Unix

Control ID: 9d50207f820c37542b716018e022cb766f0c864fc00b1336234e1f8938c5764a