Check: EX16-ED-000410
Microsoft Exchange 2016 Edge Transport Server STIG:
EX16-ED-000410
(in versions v2 r5 through v1 r4)
Title
The Exchange Spam Evaluation filter must be enabled. (Cat II impact)
Discussion
By performing filtering at the perimeter, up to 90 percent of spam, malware, and other undesirable messages may be eliminated from the transport message stream, preventing their entry into the Exchange environment. This significantly reduces the attack vector for inbound email-borne spam and malware. Spam Evaluation filters scan inbound email messages for evidence of spam and other attacks that primarily use "social engineering" techniques. Upon evaluation completion, a rating is assigned to each message estimating the likelihood of its being spam. Upon arrival at the destination mailbox, the junk mail filter threshold (also configurable) determines whether the message will be withheld from delivery, delivered to the junk mail folder, or delivered to the user’s inbox.
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, Identity, Enabled If the value of "Enabled" is not set to "True", this is a finding.
Fix Text
Open the Exchange Management Shell and enter the following command: Set-ContentFilterConfig -Enabled $true
Additional Identifiers
Rule ID: SV-221240r879653_rule
Vulnerability ID: V-221240
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 |