Title

McAfee VirusScan On Delivery Email Scan Policies must be configured to decode MIME encoded files. (Cat II impact)

Discussion

Email has become one of the most frequently used methods of spreading malware, through embedded HTML code and attachments. User awareness and training, warning users to not open suspicious emails or email attachments, and not clicking on hyperlinks, etc. from unknown or known senders, will not fully protect from email-borne malware. Mass mailing worms are similar to email-borne viruses, but are self-contained, rather than infecting an existing file. Protecting from email-borne viruses and mass mailing worms by scanning email upon delivery mitigates the risk of infection via email.

Check Content

Note: If an email client is not running on this system, this check can be marked as Not Applicable. From the ePO server console System Tree, select the Systems tab, select the asset to be checked, select Actions, select Agent, and select Modify Policies on a Single System. From the product pull down list, select VirusScan Enterprise 8.8.0. Locate in the Category column the On Delivery Email Scan Policies. Select from the Policy column the policy associated with the On Delivery Email Scan Policies. Under the Scan Items tab, locate the "Compressed files:" label. Ensure the "Decode MIME encoded files" option is selected. Criteria: If the "Decode MIME encoded files" option is selected, this is not a finding. On the client machine, use the Windows Registry Editor to navigate to the following key: HKLM\Software\McAfee\ (32-bit) HKLM\Software\Wow6432Node\McAfee\ (64-bit) SystemCore\VSCore\Email Scanner\Outlook\OnDelivery\DetectionOptions Criteria: If the value ScanMime is 1, this is not a finding. If the value is 0, this is a finding.

Fix Text

From the ePO server console System Tree, select the Systems tab, select the asset to be checked, select Actions, select Agent, and select Modify Policies on a Single System. From the product pull down list, select VirusScan Enterprise 8.8.0. Locate in the Category column the On Delivery Email Scan Policies. Select from the Policy column the policy associated with the On Delivery Email Scan Policies. Under the Scan Items tab, locate the "Compressed files:" label. Select the "Decode MIME encoded files" option. Select Save.

Additional Identifiers

Rule ID: SV-216905r397708_rule

Vulnerability ID: V-216905

Group Title: SRG-APP-000210

Expert Comments

CCIs tied to check.

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