The ESXi host must maintain the confidentiality and integrity of information during transmission by exclusively enabling Transport Layer Security (TLS) 1.2.
An XCCDF Rule
Description
TLS 1.0 and 1.1 are deprecated protocols with well-published shortcomings and vulnerabilities. TLS 1.2 should be enabled on all interfaces and SSLv3, TL 1.1, and 1.0 disabled, where supported. Mandating TLS 1.2 may break third-party integrations and add-ons to vSphere. Test these integrations carefully after implementing TLS 1.2 and roll back where appropriate. On interfaces where required functionality is broken with TLS 1.2, this finding is not applicable until such time as the third-party software supports TLS 1.2. Modify TLS settings in the following order: 1. vCenter. 2. ESXi. Satisfies: SRG-OS-000425-VMM-001710, SRG-OS-000426-VMM-001720
- ID
- SV-258749r933308_rule
- Version
- ESXI-80-000161
- Severity
- High
- References
- Updated
Remediation Templates
A Manual Procedure
From the vSphere Client, go to Hosts and Clusters.
Select the ESXi Host >> Configure >> System >> Advanced System Settings.
Click "Edit". Select the "UserVars.ESXiVPsDisabledProtocols" value and configure it to "sslv3,tlsv1,tlsv1.1".