STIGQter: STIG Summary: Microsoft Exchange 2019 Edge Server Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 30 Jan 2025:

Exchange internal Receive connectors must not allow anonymous connections.

DISA Rule

SV-259622r961161_rule

Vulnerability Number

V-259622

Group Title

SRG-APP-000261

Rule Version

EX19-ED-000136

Severity

CAT II

CCI(s)

• CCI-001308 - Automatically update spam protection mechanisms on an organization-defined frequency.

Weight

10

Fix Recommendation

Open the Exchange Management Shell and enter the following command:

Set-ReceiveConnector -Identity <'IdentityName'> -PermissionGroups 'valid user group(s)'

Note: The <IdentityName> value and user group(s) must be in quotes.

Example for user groups only: 'ExchangeServers, ExchangeUsers'

Repeat the procedures for each Receive connector.

This is an example only: Set-ReceiveConnector -Identity <'IdentityName'> -PermissionGroups 'ExchangeUsers'

Check Contents

Open the Exchange Management Shell and enter the following command:

Get-ReceiveConnector | Select-Object -Property Name, Identity, PermissionGroups |Format-List

For each Receive connector, if the value of "PermissionGroups" is "AnonymousUsers" for any noninternet connector, this is a finding.

Vulnerability Number

V-259622

Documentable

False

Rule Version

EX19-ED-000136

Severity Override Guidance

Open the Exchange Management Shell and enter the following command:

Get-ReceiveConnector | Select-Object -Property Name, Identity, PermissionGroups |Format-List

For each Receive connector, if the value of "PermissionGroups" is "AnonymousUsers" for any noninternet connector, this is a finding.

Check Content Reference

M

Target Key

5579