Title

Replies or forwards to signed/encrypted messages must be signed/encrypted. (Cat II impact)

Discussion

This setting controls whether replies and forwards to signed/encrypted mail should also be signed/encrypted.

Check Content

Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2013 -> Security -> Cryptography "Replies or forwards to signed/encrypted messages are signed/encrypted" is set to "Enabled". Procedure: Use the Windows Registry Editor to navigate to the following key: HKCU\Software\Policies\Microsoft\Office\15.0\outlook\security Criteria: If the value NoCheckOnSessionSecurity is REG_DWORD = 1, this is not a finding.

Fix Text

Set the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2013 -> Security -> Cryptography "Replies or forwards to signed/encrypted messages are signed/encrypted" to "Enabled".

Additional Identifiers

Rule ID: SV-54065r1_rule

Vulnerability ID: V-26637

Group Title: DTOO317 - Signed/encrypted messages

Expert Comments

CCIs tied to check.

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