Tanium Comply must be configured to receive Open Vulnerability and Assessment Language (OVAL) feeds only from trusted sources.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-253870	SRG-APP-000039	TANS-SV-000053	SV-253870r997292_rule	2025-02-26	2

Description
OVAL XML documents are provided from several possible sources such as the Community Intercomparison Suite (CIS) open-source repository and vendor/third-party paid repositories. These documents are used to automate the passive validation of vulnerabilities on systems and therefore require a reasonable level of confidence in their origin. Nonapproved OVAL definitions lead to a false sense of security when evaluating an enterprise environment.

Description

OVAL XML documents are provided from several possible sources such as the Community Intercomparison Suite (CIS) open-source repository and vendor/third-party paid repositories. These documents are used to automate the passive validation of vulnerabilities on systems and therefore require a reasonable level of confidence in their origin. Nonapproved OVAL definitions lead to a false sense of security when evaluating an enterprise environment.

ℹ️ Check
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 "Modules" on the top navigation banner. 3. Click "Comply". 4. Expand the left menu. 5. Under "Standards", click "Vulnerability". 6. Verify all imported vulnerability sources are from a documented trusted source. If any vulnerability sources are found that do not come from a documented trusted source, this is a finding.

ℹ️ Check

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 "Modules" on the top navigation banner. 3. Click "Comply". 4. Expand the left menu. 5. Under "Standards", click "Vulnerability". 6. Verify all imported vulnerability sources are from a documented trusted source. If any vulnerability sources are found that do not come from a documented trusted source, this is a finding.

✔️ Fix
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 "Comply". 4. Expand the left menu. 5. Under "Standards", click "Vulnerability". 6. Delete any vulnerability sources configured to nontrusted sources or reconfigure them to point to trusted sources.

✔️ Fix

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 "Comply". 4. Expand the left menu. 5. Under "Standards", click "Vulnerability". 6. Delete any vulnerability sources configured to nontrusted sources or reconfigure them to point to trusted sources.