Tanium must audit and notify system administrators (SAs) and information system security officers (ISSOs) when accounts are enabled.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-254860	TANS-OS-000860	SV-254860r986557_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 enable an existing disabled account. Sending notification of account enabling actions to the SA and ISSO is one method for mitigating this risk. Such a capability greatly reduces the risk that operating system accessibility will be negatively affected for extended periods of time and also provides logging that can be used for forensic purposes. To detect and respond to events that affect user accessibility and application processing, operating systems must audit account enabling actions and, as required, notify the appropriate individuals so they can investigate the event. To address access requirements, many operating systems can be integrated with enterprise-level authentication/access/auditing mechanisms that meet or exceed access control policy requirements.

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 enable an existing disabled account. Sending notification of account enabling actions to the SA and ISSO is one method for mitigating this risk. Such a capability greatly reduces the risk that operating system accessibility will be negatively affected for extended periods of time and also provides logging that can be used for forensic purposes. To detect and respond to events that affect user accessibility and application processing, operating systems must audit account enabling actions and, as required, notify the appropriate individuals so they can investigate the event. To address access requirements, many operating systems can be integrated with enterprise-level authentication/access/auditing mechanisms that meet or exceed access control policy requirements.

STIG	Date
Tanium 7.x Operating System on TanOS Security Technical Implementation Guide	2024-06-04

Details

Check Text ( C-58473r986556_chk )
1. Access the Tanium Operating System (TanOS) interactively. 2. Press "A" for "Appliance Configuration Menu," and then press "Enter". 3. Press "4" for "Syslog Configuration," and then press "Enter". 4. Press "1" for "Check current status," and then press "Enter". If the syslog status page states, "No existing TanOS syslog forwarding configuration found", this is a finding. If the syslog status page states, "Syslog forwarding configuration" and the SIEM administrator verifies SIEM is receiving the events correctly and generating notifications for account enable events, this is not a finding.

Check Text ( C-58473r986556_chk )

1. Access the Tanium Operating System (TanOS) interactively.

2. Press "A" for "Appliance Configuration Menu," and then press "Enter".

3. Press "4" for "Syslog Configuration," and then press "Enter".

4. Press "1" for "Check current status," and then press "Enter".

If the syslog status page states, "No existing TanOS syslog forwarding configuration found", this is a finding.

If the syslog status page states, "Syslog forwarding configuration" and the SIEM administrator verifies SIEM is receiving the events correctly and generating notifications for account enable events, this is not a finding.

Fix Text (F-58417r866120_fix)
1. Access the TanOS interactively. 2. Press "A" for "Appliance Configuration Menu," and then press "Enter". 3. Press "4" for "Syslog Configuration," and then press "Enter". 4. Press "5" for "Configure syslog forwarding," and then press "Enter". 5. Enter the destination host (IP address or hostname) provided by the SIEM administrator, and then press "Enter". 6. Enter the destination port number and then press "Enter". 7. If TLS is required for this syslog destination, enter "Yes", otherwise enter "No", and then press "Enter". 8. Enter the destination protocol, "udp" or "tcp", and then press "Enter". 9. Work with the SIEM administrator to validate events are being received, and to configure notifications for account removal/deletion events.

Fix Text (F-58417r866120_fix)

1. Access the TanOS interactively.

2. Press "A" for "Appliance Configuration Menu," and then press "Enter".

3. Press "4" for "Syslog Configuration," and then press "Enter".

4. Press "5" for "Configure syslog forwarding," and then press "Enter".

5. Enter the destination host (IP address or hostname) provided by the SIEM administrator, and then press "Enter".

6. Enter the destination port number and then press "Enter".

7. If TLS is required for this syslog destination, enter "Yes", otherwise enter "No", and then press "Enter".

8. Enter the destination protocol, "udp" or "tcp", and then press "Enter".

9. Work with the SIEM administrator to validate events are being received, and to configure notifications for account removal/deletion events.