Details
Outlook can display email messages and other items in three formats: plain text, Rich Text Format (RTF), and HTML. By default, Outlook displays digitally signed email messages in the format they were received in.
Solution
Set the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2013 -> Outlook Options -> Preferences -> E-mail Options ‘Read signed e-mail as plain text’ to ‘Enabled’.
Supportive Information
The following resource is also helpful.
This security hardening control applies to the following category of controls within NIST 800-53: Configuration Management.This control applies to the following type of system Windows.
References
- 800-53|CM-6b.
- CAT|II
- CCI|CCI-000366
- Rule-ID|SV-53868r1_rule
- STIG-ID|DTOO215
- Vuln-ID|V-17771