The ESXi host SSH daemon must be configured to only use FIPS 140-2 approved ciphers.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-239331 | ESXI-67-100010 | SV-239331r816580_rule | Medium |
| Description |
|---|
| Approved algorithms should impart some level of confidence in their implementation. These are also required for compliance. |
| STIG | Date |
|---|---|
| VMware vSphere 6.7 ESXi Security Technical Implementation Guide | 2022-01-05 |
Details
| Check Text ( C-42564r816578_chk ) |
|---|
| Verify that only FIPS-approved ciphers are used by running the following command: # grep -i "^Ciphers" /etc/ssh/sshd_config If there is no output, or the output is not exactly "Ciphers aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr", this is a finding. |
| Fix Text (F-42523r816579_fix) |
|---|
| Limit the ciphers to algorithms that are FIPS approved. Counter (CTR) mode is also preferred over cipher-block chaining (CBC) mode. Add or correct the following line in "/etc/ssh/sshd_config": Ciphers aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr |