CIS Ubuntu 14.04 LTS - 4.1.8 Ensure login and logout events are collected

DevOps & Security

Collect audit events for login and logout activity from faillog, lastlog, and tallylog

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Source SKILL.md: https://github.com/CyberStrikeus/CyberStrike/blob/HEAD/.cyberstrike/skill/CIS_benchmarks/Operating_Systems/Ubuntu/CIS_Ubuntu_Linux_14.04_LTS_Benchmark_v2.1.0/cis-ubuntu1404-v210-4-1-8/SKILL.md

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4.1.8 Ensure login and logout events are collected (Scored)

Profile Applicability

Level 2 - Server
Level 2 - Workstation

Description

Monitor login and logout events. The parameters below track changes to files associated with login/logout events. The file /var/log/faillog tracks failed events from login. The file /var/log/lastlog maintain records of the last time a user successfully logged in. The file /var/log/tallylog maintains records of failures via the pam_tally2 module.

Rationale

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

Audit Procedure

Run the following commands:

grep logins /etc/audit/audit.rules
auditctl -l | grep logins

Expected Result

Verify output of both includes:

-w /var/log/faillog -p wa -k logins
-w /var/log/lastlog -p wa -k logins
-w /var/log/tallylog -p wa -k logins

Remediation

Add the following lines to the /etc/audit/audit.rules file:

-w /var/log/faillog -p wa -k logins
-w /var/log/lastlog -p wa -k logins
-w /var/log/tallylog -p wa -k logins

Notes: Reloading the auditd config to set active settings may require a system reboot.

Default Value

Not configured by default.

References

CIS Controls v6.1 - 5.5 Log Failed Administrative Login Attempts
CIS Controls v6.1 - 16.10 Profile User Account Usage And Monitor For Anomalies
CIS Controls v6.1 - 16.4 Automatically Log Off Users After Standard Period Of Inactivity

Profile

Level 2 - Server
Level 2 - Workstation