The UEM server must be configured to prohibit client negotiation to TLS 1.1, TLS 1.0, SSL 2.0, or SSL 3.0.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-234669	SRG-APP-000560	SRG-APP-000560-UEM-000394	SV-234669r961869_rule	2024-12-09	2

Description
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 Transport Layer Security (TLS) gateways (also known as Secure Sockets Layer [SSL] gateways), web servers, and web applications. Application protocols such as HTTPS and DNSSEC use TLS as the underlying security protocol and thus are in scope for this requirement. NIST SP 800-52 provides guidance for client negotiation, either on DoD-only or on public-facing servers. Satisfies:FCS_TLSC_EXT.1.1 Reference:PP-MDM-412061

Description

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 Transport Layer Security (TLS) gateways (also known as Secure Sockets Layer [SSL] gateways), web servers, and web applications. Application protocols such as HTTPS and DNSSEC use TLS as the underlying security protocol and thus are in scope for this requirement. NIST SP 800-52 provides guidance for client negotiation, either on DoD-only or on public-facing servers. Satisfies:FCS_TLSC_EXT.1.1 Reference:PP-MDM-412061

ℹ️ Check
Verify the UEM server is configured to prohibit client negotiation to TLS 1.1, TLS 1.0, SSL 2.0, or SSL 3.0. If the UEM server is not configured to prohibit client negotiation to TLS 1.1, TLS 1.0, SSL 2.0, or SSL 3.0, this is a finding.

✔️ Fix
Configure the UEM server to prohibit client negotiation to TLS 1.1, TLS 1.0, SSL 2.0, or SSL 3.0.