Details

This policy setting allows you to define the number of days that must pass before virus definitions are considered out of date. If definitions are determined to be out of date this state may trigger several additional actions including falling back to an alternative update source or displaying a warning icon in the user interface. By default this value is set to 14 days. If you enable this setting virus definitions will be considered out of date after the number of days specified have passed without an update. If you disable or do not configure this setting virus definitions will be considered out of date after the default number of days have passed without an update.

NOTE: Nessus has provided the target output to assist in reviewing the benchmark to ensure target compliance.

Solution

Set the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Windows Defender Antivirus -> Signature Updates -> ‘Define the number of days before virus definitions are considered out of date’ to ‘Enabled’ and select ‘7’ or less in the drop down box.

Do not select a value of 0.

This disables the option.

Supportive Information

The following resource is also helpful.

• https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_MS_Windows_Defender_Antivirus_V2R3_STIG.zip

This security hardening control applies to the following category of controls within NIST 800-53: System and Information Integrity.This control applies to the following type of system Windows.

References

• 800-53|SI-3b.
• CAT|I
• CCI|CCI-001240
• Rule-ID|SV-213453r569189_rule
• STIG-ID|WNDF-AV-000029
• STIG-Legacy|SV-89923
• STIG-Legacy|V-75243
• Vuln-ID|V-213453

Source

• Tenable.com/audits