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

Exchange receive connectors must control the number of recipients chunked on a single message.

DISA Rule

SV-259605r961155_rule

Vulnerability Number

V-259605

Group Title

SRG-APP-000247

Rule Version

EX19-ED-000118

Severity

CAT II

CCI(s)

• CCI-001095 - Manage capacity, bandwidth, or other redundancy to limit the effects of information flooding types of denial of service attacks.

Weight

10

Fix Recommendation

Open the Exchange Management Shell and enter the following command:

Set-ReceiveConnector -Identity <'IdentityName'> -ChunkingEnabled $true

Note: The <IdentityName> value must be in quotes.

Repeat the procedure for each receive connector.

Check Contents

Open the Exchange Management Shell and enter the following command:

Get-ReceiveConnector | Select-Object -Property Name, Identity, ChunkingEnabled

For each receive connector, if the value of "ChunkingEnabled" is not set to "True", this is a finding.

Vulnerability Number

V-259605

Documentable

False

Rule Version

EX19-ED-000118

Severity Override Guidance

Open the Exchange Management Shell and enter the following command:

Get-ReceiveConnector | Select-Object -Property Name, Identity, ChunkingEnabled

For each receive connector, if the value of "ChunkingEnabled" is not set to "True", this is a finding.

Check Content Reference

M

Target Key

5579