The Photon operating system must audit all account modifications.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-251878	PHTN-67-000044	SV-251878r816564_rule		Medium

Description
Once an attacker establishes access to a system, the attacker often attempts to create a persistent method of reestablishing access. One way to accomplish this is for the attacker to modify an existing account. Auditing account modification actions provides logging that can be used for forensic purposes.

STIG	Date
VMware vSphere 6.7 Photon OS Security Technical Implementation Guide	2022-01-03

Details

Check Text ( C-55336r816562_chk )
At the command line, execute the following command: # auditctl -l \| grep -E "(usermod\|groupmod)" Expected result: -w /usr/sbin/usermod -p x -k usermod -w /usr/sbin/groupmod -p x -k groupmod If the output does not match the expected result, this is a finding. Note: This check depends on the auditd service to be in a running state for accurate results. Enabling the auditd service is done as part of a separate control.

Check Text ( C-55336r816562_chk )

At the command line, execute the following command:

# auditctl -l | grep -E "(usermod|groupmod)"

Expected result:

-w /usr/sbin/usermod -p x -k usermod
-w /usr/sbin/groupmod -p x -k groupmod

If the output does not match the expected result, this is a finding.

Note: This check depends on the auditd service to be in a running state for accurate results. Enabling the auditd service is done as part of a separate control.

Fix Text (F-55288r816563_fix)
Open /etc/audit/rules.d/audit.STIG.rules with a text editor and add the following lines: -w /usr/sbin/usermod -p x -k usermod -w /usr/sbin/groupmod -p x -k groupmod At the command line, execute the following command: # /sbin/augenrules --load