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The SSH daemon must be configured to only use FIPS 140-2 approved ciphers.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| GEN005505-ESXI5-000097 | GEN005505-ESXI5-000097 | GEN005505-ESXI5-000097_rule | Medium |
| Description |
|---|
| DoD information systems are required to use FIPS 140-2 approved ciphers. SSHv2 ciphers meeting this requirement are 3DES and AES. |
| STIG | Date |
|---|---|
| VMware ESXi v5 Security Technical Implementation Guide | 2013-01-15 |
Details
| Check Text ( C-GEN005505-ESXI5-000097_chk ) |
|---|
| Disable lock down mode. Enable the ESXi Shell. Check the SSH daemon configuration for allowed ciphers (example: 3des-ctr, aes128-ctr, aes192-ctr, aes256-ctr) . # grep -i ciphers /etc/ssh/sshd_config | grep -v '^#' Re-enable lock down mode. If no lines are returned, or the returned ciphers list contains any cipher not starting with 3des or aes, this is a finding. |
| Fix Text (F-GEN005505-ESXI5-000097_fix) |
|---|
| Disable lock down mode. Enable the ESXi Shell. Edit the SSH daemon configuration and add/modify the "Ciphers" configuration (example: 3des-ctr, aes128-ctr, aes192-ctr, aes256-ctr). # vi /etc/ssh/sshd_config Re-enable lock down mode. |