If the MDM server includes a mobile email management capability, the email client must notify the user if it cannot verify the revocation status of the certificate.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-36199	SRG-APP-175-MDM-187-MEM	SV-47603r1_rule		Low

Description
If the user is aware that the revocation status of a certificate could not be verified, the user is better prepared to identify suspicious behavior that indicates an IA incident is in progress. Failure to notify the user of this occurrence makes it more likely that an adversary can use revoked certificates without detection.

STIG	Date
Mobile Device Manager Security Requirements Guide	2013-01-24

Details

Check Text ( C-44440r1_chk )
Determine if the MDM server includes a mobile email management capability. If no, this requirement is not applicable. If yes, perform the following procedure: Verify the mobile email client notifies the user if it cannot verify the revocation status of the certificate. Talk to the site system administrator and have them confirm that this capability exists in the email management client. Also, review the MDM server configuration. If the mobile email client does not notify the user it cannot verify the revocation status of the certificate, this is a finding.

Check Text ( C-44440r1_chk )

Determine if the MDM server includes a mobile email management capability. If no, this requirement is not applicable. If yes, perform the following procedure: Verify the mobile email client notifies the user if it cannot verify the revocation status of the certificate. Talk to the site system administrator and have them confirm that this capability exists in the email management client. Also, review the MDM server configuration. If the mobile email client does not notify the user it cannot verify the revocation status of the certificate, this is a finding.

Fix Text (F-40729r1_fix)
Configure the MDM server to give the user the option to deny acceptance of a certificate if it cannot verify the certificate's revocation status, if this capability exists.