Check: EX16-ED-000350
Microsoft Exchange 2016 Edge Transport Server STIG:
EX16-ED-000350
(in versions v2 r5 through v1 r4)
Title
Exchange filtered messages must be archived. (Cat II impact)
Discussion
By performing filtering at the perimeter, up to 90 percent of spam, malware, and other undesirable messages are eliminated from the message stream rather than admitting them into the mail server environment. This significantly reduces the attack vector for inbound email-borne spam and malware. As messages are filtered, it is prudent to temporarily host them in an archive for evaluation by administrators or users. The archive can be used to recover messages that might have been inappropriately filtered, preventing data loss, and to provide a base of analysis that can provide future filter refinements.
Check Content
Note: If third-party anti-spam product is being used, the anti-spam product must be configured to meet the requirement. Open the Exchange Management Shell and enter the following command: Get-ContentFilterConfig | Select Name, QuarantineMailbox If no SMTP address is assigned to "QuarantineMailbox", this is a finding.
Fix Text
Open the Exchange Management Shell and enter the following command: Set-ContentFilterConfig -QuarantineMailbox <'QuarantineMailbox SmtpAddress'> Note: The <QuarantineMailbox SmtpAddress> value must be in single quotes.
Additional Identifiers
Rule ID: SV-221234r879653_rule
Vulnerability ID: V-221234
Group Title: SRG-APP-000261
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-001308 |
The information system automatically updates spam protection mechanisms. |
Controls
Number | Title |
---|---|
SI-8 (2) |
Automatic Updates |