The BIG-IP Core implementation must be configured to comply with the required TLS settings in NIST SP 800-52 Revision 1 for TLS services to virtual servers.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-215747	F5BI-LT-000035	SV-215747r557356_rule		Medium

Description
NIST SP 800-52 Revision 1 provides guidance on using the most secure version and configuration of the TLS/SSL protocol. Using older unauthorized versions or incorrectly configuring protocol negotiation makes the gateway vulnerable to known and unknown attacks that exploit vulnerabilities in this protocol. This requirement applies to TLS gateways (also known as SSL gateways) and is not applicable to VPN devices. Application protocols such as HTTPS and DNSSEC use TLS/SSL as the underlying security protocol and thus are in scope for this requirement. NIST SP 800-52 Revision 1 provides guidance. NIST SP 800-52 Revision 1 sets TLS version 1.1 as a minimum version, thus all versions of SSL are not allowed (including for client negotiation) either on DoD-only or on public facing servers.

Description

NIST SP 800-52 Revision 1 provides guidance on using the most secure version and configuration of the TLS/SSL protocol. Using older unauthorized versions or incorrectly configuring protocol negotiation makes the gateway vulnerable to known and unknown attacks that exploit vulnerabilities in this protocol. This requirement applies to TLS gateways (also known as SSL gateways) and is not applicable to VPN devices. Application protocols such as HTTPS and DNSSEC use TLS/SSL as the underlying security protocol and thus are in scope for this requirement. NIST SP 800-52 Revision 1 provides guidance. NIST SP 800-52 Revision 1 sets TLS version 1.1 as a minimum version, thus all versions of SSL are not allowed (including for client negotiation) either on DoD-only or on public facing servers.

STIG	Date
F5 BIG-IP Local Traffic Manager Security Technical Implementation Guide	2024-01-26

Details

Check Text ( C-16939r291054_chk )
If the BIG-IP Core does not provide intermediary services for TLS, or application protocols that use TLS (e.g., DNSSEC or HTTPS) for virtual servers, this is not applicable. When intermediary services for TLS are provided, verify the BIG-IP Core is configured to implement the applicable required TLS settings in NIST PUB SP 800-52 Revision 1. Navigate to the BIG-IP System manager >> Local Traffic >> Profiles >> SSL >> Client Verify a profile exists that is FIPS compliant. Select FIPS-compliant profile. Select "Advanced" next to "Configuration". Verify "Ciphers" under "Configuration" section is configured to use FIPS-compliant ciphers. Verify the BIG-IP Core is configured to use FIPS-compliant server profile: Navigate to the BIG-IP System manager >> Local Traffic >> Virtual Servers >> Virtual Servers List tab. Select Virtual Servers(s) from the list to verify. Verify under "Configuration" section, that the FIPS-compliant profile is in the "Selected" area for "SSL Profile (Client)". If the BIG-IP Core is not configured to implement the applicable required TLS settings in NIST PUB SP 800-52 Revision 1, this is a finding.

Check Text ( C-16939r291054_chk )

If the BIG-IP Core does not provide intermediary services for TLS, or application protocols that use TLS (e.g., DNSSEC or HTTPS) for virtual servers, this is not applicable.

When intermediary services for TLS are provided, verify the BIG-IP Core is configured to implement the applicable required TLS settings in NIST PUB SP 800-52 Revision 1.

Navigate to the BIG-IP System manager >> Local Traffic >> Profiles >> SSL >> Client

Verify a profile exists that is FIPS compliant.

Select FIPS-compliant profile.

Select "Advanced" next to "Configuration".

Verify "Ciphers" under "Configuration" section is configured to use FIPS-compliant ciphers.

Verify the BIG-IP Core is configured to use FIPS-compliant server profile:

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

Select Virtual Servers(s) from the list to verify.

Verify under "Configuration" section, that the FIPS-compliant profile is in the "Selected" area for "SSL Profile (Client)".

If the BIG-IP Core is not configured to implement the applicable required TLS settings in NIST PUB SP 800-52 Revision 1, this is a finding.

Fix Text (F-16937r291055_fix)
If intermediary services for TLS are provided, configure the BIG-IP Core to comply with applicable required TLS settings in NIST PUB SP 800-52 Revision 1.