The McAfee VirusScan Enterprise for Linux 1.9.x/2.0.x On-Demand scanner must be configured to decode MIME encoded files.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-63131	DTAVSEL-112	SV-77621r1_rule		Medium

Description
Malware is often packaged within an archive. In addition, archives might have other archives within. Not scanning archive files introduces the risk of infected files being introduced into the environment.

STIG	Date
McAfee VSEL 1.9/2.0 Local Client Security Technical Implementation Guide	2020-03-24

Details

Check Text ( C-63883r1_chk )
From a desktop browser window, connect to the McAfee VirusScan Enterprise for Linux (VSEL) Monitor (WEB interface) of the Linux system being reviewed and logon with the nails user account. In the VSEL WEB Monitor, review tasks under "View", "Scheduled Tasks". With the System Administrator's assistance, determine which task is intended as the regularly scheduled scan task. Click on the task, and then click "Modify". Under "2. What to Scan", click "Next". Under "3. Choose Scan Settings", "Anti-virus Scanning Options", verify the "Decode MIME encoded files" check box has been selected. If the "Decode MIME encoded files" check box has not been selected, this is a finding. To validate without the Web interface, access the Linux system being reviewed, either at the console or by a SSH connection. At the command line, navigate to /var/opt/NAI/LinuxShield/etc. Enter the command "grep "nailsd.profile.ODS.mime" ods.cfg" If the response given for "nailsd.profile.ODS.mime" is not "true", this is a finding.

Check Text ( C-63883r1_chk )

From a desktop browser window, connect to the McAfee VirusScan Enterprise for Linux (VSEL) Monitor (WEB interface) of the Linux system being reviewed and logon with the nails user account.

In the VSEL WEB Monitor, review tasks under "View", "Scheduled Tasks".
With the System Administrator's assistance, determine which task is intended as the regularly scheduled scan task.
Click on the task, and then click "Modify".
Under "2. What to Scan", click "Next".
Under "3. Choose Scan Settings", "Anti-virus Scanning Options", verify the "Decode MIME encoded files" check box has been selected.

If the "Decode MIME encoded files" check box has not been selected, this is a finding.

To validate without the Web interface, access the Linux system being reviewed, either at the console or by a SSH connection.
At the command line, navigate to /var/opt/NAI/LinuxShield/etc.
Enter the command "grep "nailsd.profile.ODS.mime" ods.cfg"

If the response given for "nailsd.profile.ODS.mime" is not "true", this is a finding.

Fix Text (F-69049r1_fix)
From a desktop browser window, connect to the McAfee VirusScan Enterprise for Linux (VSEL) Monitor (WEB interface) of the Linux system being reviewed and logon with the nails user account. In the VSEL WEB Monitor, review tasks under "View", "Scheduled Tasks". With the System Administrator's assistance, determine which task is intended as the regularly scheduled scan task. Click on the task, and then click "Modify". Under "2. What to Scan", click "Next". Under "3. Choose Scan Settings", "Anti-virus Scanning Options", select the "Decode MIME encoded files" check box, click "Next", and then click "Finish".

Fix Text (F-69049r1_fix)