STIGQter: STIG Summary: F5 BIG-IP Local Traffic Manager 11.x Security Technical Implementation Guide Version: 2 Release: 1 Benchmark Date: 23 Oct 2020:

The BIG-IP Core implementation must be configured to inspect for protocol compliance and protocol anomalies in inbound SMTP and Extended SMTP communications traffic to virtual servers.

DISA Rule

SV-215801r557356_rule

Vulnerability Number

V-215801

Group Title

SRG-NET-000512-ALG-000064

Rule Version

F5BI-LT-000303

Severity

CAT II

CCI(s)

• CCI-001125 - The information system enforces adherence to protocol format.
• CCI-000366 - The organization implements the security configuration settings.

Weight

10

Fix Recommendation

If the BIG-IP Core provides intermediary/proxy services for SMTP communications traffic, configure the BIG-IP Core as follows:

Configure the BIG-IP LTM module to inspect for protocol compliance and protocol anomalies in inbound SMTP and Extended SMTP communications traffic.

Check Contents

If the BIG-IP Core does not provide intermediary/proxy services for SMTP communications traffic for virtual servers, this is not applicable.

When intermediary/proxy services for SMTP communication traffic are provided, verify the BIG-IP Core is configured as follows:

Verify the BIG-IP LTM module is configured to inspect for protocol compliance and protocol anomalies in inbound SMTP and Extended SMTP communications traffic.

Navigate to the BIG-IP System manager >> Local Traffic >> Virtual Servers >> Virtual Servers List tab.

Select a Virtual Server that has been configured as an SMTP proxy.

Verify that "SMTP Profile" under the "Configuration" section is set to a locally configured SMTP profile.

Verify the configuration of the selected SMTP profile:

Navigate to the BIG-IP System manager >> Local Traffic >> Profiles >> Services >> SMTP.

Select the SMTP profile that was to configure the Virtual Server.

Verify that "Protocol Security" is Enabled under the "Settings" section.

If the BIG-IP Core does not inspect inbound SMTP and Extended SMTP communications traffic for protocol compliance and protocol anomalies, this is a finding.

Vulnerability Number

V-215801

Documentable

False

Rule Version

F5BI-LT-000303

Severity Override Guidance

If the BIG-IP Core does not provide intermediary/proxy services for SMTP communications traffic for virtual servers, this is not applicable.

When intermediary/proxy services for SMTP communication traffic are provided, verify the BIG-IP Core is configured as follows:

Verify the BIG-IP LTM module is configured to inspect for protocol compliance and protocol anomalies in inbound SMTP and Extended SMTP communications traffic.

Navigate to the BIG-IP System manager >> Local Traffic >> Virtual Servers >> Virtual Servers List tab.

Select a Virtual Server that has been configured as an SMTP proxy.

Verify that "SMTP Profile" under the "Configuration" section is set to a locally configured SMTP profile.

Verify the configuration of the selected SMTP profile:

Navigate to the BIG-IP System manager >> Local Traffic >> Profiles >> Services >> SMTP.

Select the SMTP profile that was to configure the Virtual Server.

Verify that "Protocol Security" is Enabled under the "Settings" section.

If the BIG-IP Core does not inspect inbound SMTP and Extended SMTP communications traffic for protocol compliance and protocol anomalies, this is a finding.

Check Content Reference

M

Target Key

4019

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