The Tanium Server and Client applications must have logging enabled.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-253785	SRG-APP-000226	TANS-00-001155	SV-253785r997226_rule	2025-02-26	2

Description
Failure to a known state can address safety or security in accordance with the mission/business needs of the organization. Failure to a known secure state helps prevent a loss of confidentiality, integrity, or availability in the event of a failure of the information system or a component of the system. Preserving application state information helps to facilitate application restart and return to the operational mode of the organization with less disruption to mission-essential processes.

Description

Failure to a known state can address safety or security in accordance with the mission/business needs of the organization. Failure to a known secure state helps prevent a loss of confidentiality, integrity, or availability in the event of a failure of the information system or a component of the system. Preserving application state information helps to facilitate application restart and return to the operational mode of the organization with less disruption to mission-essential processes.

ℹ️ Check
For Tanium Server: 1. Using a web browser on a system that has connectivity to the Tanium application, access the Tanium application web user interface (UI) and log on with multifactor authentication. 2. Click "Administration" on the top navigation banner. 3. Under "Configuration", select "Logging". 4. Select "Log Level". If the value for the current level for "Tanium Server" and "Tanium Module Server" is not set to "1" or higher, this is a finding. For Tanium Client: 1. Using a web browser on a system that has connectivity to the Tanium application, access the Tanium application web UI. Log on with multifactor authentication. 2. Click "Modules" on the top navigation banner. 3. Click "Interact". 4. In the "Explore Data" box, type the following question: Get Tanium Client Explicit Setting[LogVerbosityLevel] < 1 and Is Windows from all machines with Tanium Client Explicit Setting[LogVerbosityLevel] < 1 If any answers are returned that are "0", this is a finding.

ℹ️ Check

For Tanium Server: 1. Using a web browser on a system that has connectivity to the Tanium application, access the Tanium application web user interface (UI) and log on with multifactor authentication. 2. Click "Administration" on the top navigation banner. 3. Under "Configuration", select "Logging". 4. Select "Log Level". If the value for the current level for "Tanium Server" and "Tanium Module Server" is not set to "1" or higher, this is a finding. For Tanium Client: 1. Using a web browser on a system that has connectivity to the Tanium application, access the Tanium application web UI. Log on with multifactor authentication. 2. Click "Modules" on the top navigation banner. 3. Click "Interact". 4. In the "Explore Data" box, type the following question: Get Tanium Client Explicit Setting[LogVerbosityLevel] < 1 and Is Windows from all machines with Tanium Client Explicit Setting[LogVerbosityLevel] < 1 If any answers are returned that are "0", this is a finding.

✔️ Fix
For Tanium Server: 1. Using a web browser on a system that has connectivity to the Tanium application, access the Tanium application web UI and log on with multifactor authentication. 2. Click "Administration" on the top navigation banner. 3. Under "Configuration", select "Logging". 4. In "Log Verbosity Level for Troubleshooting", set "Tanium Server" and "Tanium Module Server" to "1". For Tanium Client: 1. Using a web browser on a system that has connectivity to the Tanium application, access the Tanium application web UI and log on with multifactor authentication. 2. Click "Modules" on the top navigation banner. 3. Click "Interact". 4. In the "Explore Data" box, type the following question: Get Tanium Client Explicit Setting[LogVerbosityLevel] < 1 and Is Windows from all machines with Tanium Client Explicit Setting[LogVerbosityLevel] < 1 5. Select the row with "Is windows" set to "True" and deploy the following action and settings: a) Deployment Package: Modify Tanium Client Setting b) RegType: REG_DWORD c) ValueName: LogVerbosityLevel d) ValueData: 1 or higher Schedule Deployment a) Distribute over: 1 hour 6. Click "Show Preview to continue". 7. Click "Deploy Action". 8. Select the row with "Is windows" set to "False" and deploy the following action and settings: a) Deployment Package: Modify Tanium Client Setting [Non-Windows] b) RegType: NUMERIC c) ValueName: LogVerbosityLevel d) ValueData: 1 or higher Schedule Deployment a) Distribute over: 1 hour 9. Click "Show Preview to continue". 10. Click "Deploy Action".

✔️ Fix

For Tanium Server: 1. Using a web browser on a system that has connectivity to the Tanium application, access the Tanium application web UI and log on with multifactor authentication. 2. Click "Administration" on the top navigation banner. 3. Under "Configuration", select "Logging". 4. In "Log Verbosity Level for Troubleshooting", set "Tanium Server" and "Tanium Module Server" to "1". For Tanium Client: 1. Using a web browser on a system that has connectivity to the Tanium application, access the Tanium application web UI and log on with multifactor authentication. 2. Click "Modules" on the top navigation banner. 3. Click "Interact". 4. In the "Explore Data" box, type the following question: Get Tanium Client Explicit Setting[LogVerbosityLevel] < 1 and Is Windows from all machines with Tanium Client Explicit Setting[LogVerbosityLevel] < 1 5. Select the row with "Is windows" set to "True" and deploy the following action and settings: a) Deployment Package: Modify Tanium Client Setting b) RegType: REG_DWORD c) ValueName: LogVerbosityLevel d) ValueData: 1 or higher Schedule Deployment a) Distribute over: 1 hour 6. Click "Show Preview to continue". 7. Click "Deploy Action". 8. Select the row with "Is windows" set to "False" and deploy the following action and settings: a) Deployment Package: Modify Tanium Client Setting [Non-Windows] b) RegType: NUMERIC c) ValueName: LogVerbosityLevel d) ValueData: 1 or higher Schedule Deployment a) Distribute over: 1 hour 9. Click "Show Preview to continue". 10. Click "Deploy Action".