STIGQter: STIG Summary: Microsoft Exchange 2013 Mailbox Server Security Technical Implementation Guide Version: 2 Release: 1 Benchmark Date: 22 Jan 2021:

The Exchange global inbound message size must be controlled.

DISA Rule

SV-207309r615936_rule

Vulnerability Number

V-207309

Group Title

SRG-APP-000247

Rule Version

EX13-MB-000215

Severity

CAT III

CCI(s)

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

Weight

10

Fix Recommendation

Update the EDSP.

Open the Exchange Management Shell and enter the following command:

Set-TransportConfig -MaxReceiveSize 10MB

or

The value as identified by the EDSP that has obtained a signoff with risk acceptance.

Check Contents

Review the Email Domain Security Plan (EDSP).

Determine the global maximum message receive size.

Open the Exchange Management Shell and enter the following command:

Get-TransportConfig | Select Name, Identity, MaxReceiveSize

If the value of MaxReceiveSize is not set to 10MB, this is a finding.

or

If the value of MaxReceiveSize is set to an alternate value and has signoff and risk acceptance in the EDSP, this is not a finding.

Vulnerability Number

V-207309

Documentable

False

Rule Version

EX13-MB-000215

Severity Override Guidance

Review the Email Domain Security Plan (EDSP).

Determine the global maximum message receive size.

Open the Exchange Management Shell and enter the following command:

Get-TransportConfig | Select Name, Identity, MaxReceiveSize

If the value of MaxReceiveSize is not set to 10MB, this is a finding.

or

If the value of MaxReceiveSize is set to an alternate value and has signoff and risk acceptance in the EDSP, this is not a finding.

Check Content Reference

M

Target Key

2923

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