cis-ubuntu1604-v200-4-1-15

name	cis-ubuntu1604-v200-4-1-15
description	Ensure system administrator command executions (sudo) are collected
category	cis-logging
version	2.0.0
author	cyberstrike-official
tags	["cis","ubuntu","linux","ubuntu-16.04","auditd","logging"]
cis_id	4.1.15
cis_benchmark	CIS Ubuntu Linux 16.04 LTS Benchmark v2.0.0
tech_stack	["ubuntu","linux"]
cwe_ids	[]
chains_with	[]
prerequisites	[]
severity_boost	{}

CIS Ubuntu Linux 16.04 LTS Benchmark v2.0.0 - Control 4.1.15

Profile

• Level: 2 - Server
• Level: 2 - Workstation
• Assessment Status: Automated

Description

sudo provides users with temporary elevated privileges to perform operations. Monitor the administrator with temporary elevated privileges and the operation(s) they performed.

Note: Reloading the auditd config to set active settings requires the auditd service to be restarted, and may require a system reboot.

Rationale

Creating an audit log of administrators with temporary elevated privileges and the operation(s) they performed is essential to reporting. Administrators will want to correlate the events written to the audit trail with the records written to sudo logfile to verify if unauthorized commands have been executed.

Impact

None.

Audit Procedure

Command Line

On a 32 bit system:

Run the following command to verify the rules are contained in a .rules file in the /etc/audit/rules.d/ directory:

grep actions /etc/audit/rules.d/*.rules

Verify the output includes:

-a exit,always -F arch=b32 -C euid!=uid -F euid=0 -Fauid>=1000 -F auid!=4294967295 -S execve -k actions

Run the following command to verify that rules are in the running auditd config:

auditctl -l | grep actions

Verify the output includes:

-a always,exit -F arch=b32 -S execve -C uid!=euid -F euid=0 -F auid>=1000 -F auid!=-1 -F key=actions

On a 64 bit system:

Run the following command to verify the rules are contained in a .rules file in the /etc/audit/rules.d/ directory:

grep actions /etc/audit/rules.d/*.rules

Verify the output includes:

-a exit,always -F arch=b64 -C euid!=uid -F euid=0 -Fauid>=1000 -F auid!=4294967295 -S execve -k actions
-a exit,always -F arch=b32 -C euid!=uid -F euid=0 -Fauid>=1000 -F auid!=4294967295 -S execve -k actions

Run the following command to verify that rules are in the running auditd config:

auditctl -l | grep actions

Verify the output includes: