Title

The Tanium cryptographic signing capabilities must be enabled on the Tanium Clients to safeguard the authenticity of communications sessions when answering requests from the Tanium Server. (Cat II impact)

Discussion

All of Tanium's signing capabilities should be enabled upon install. Tanium supports the cryptographic signing and verification before execution of all Sensors, Questions, Actions, Sensor Libraries, File Shards, etc. Enabling signing removes the ability of an attacker to conduct man-in-the-middle (MitM) attacks for remote code execution and precludes the modification of the aforementioned data elements in transit. Additionally, Tanium supports object-level signing for content ingested into the Tanium platform. This allows for the detection and rejection of changes to objects (sensors, actions, etc.) by even a privileged user within Tanium. Tanium has built-in signing capabilities enabled by default when installed. Cryptographic signing and verification of all Sensors, Questions, Actions, Sensor Libraries, File Shards, etc., before execution will be enforced by Tanium. Signing will prevent MitM remote code execution attacks and will protect data element in transit. Tanium also supports object-level signing for content within the Tanium platform. Satisfies: SRG-APP-000219

Check Content

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 "Platform Settings". 4. In the "Filter Items" search box, type "AllQuestionsRequireSignatureFlag". 5. Click "Enter". If no results are returned, this is a finding. If results are returned for "AllQuestionsRequireSignatureFlag" but the value is not "1", this is a finding.

Fix Text

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 "Platform Settings". 4. Click "Create Setting". 5. Select "Client" box for "Setting Type". 6. In "Create Platform Setting" dialog box, enter "AllQuestionsRequireSignatureFlag" for " Name". 7. Select "Numeric" radio button for "Value Type". 8. Enter "1" for "Value". 9. Click "Save".

Additional Identifiers

Rule ID: SV-253807r1015838_rule

Vulnerability ID: V-253807

Group Title: SRG-APP-000131

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.