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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 |
|---|---|---|---|---|
| V-63501 | ESXI-06-100010 | SV-77991r2_rule | Medium |
| Description |
|---|
| Approved algorithms should impart some level of confidence in their implementation. These are also required for compliance. Note: That this does not imply FIPS 140-2 certification. |
| STIG | Date |
|---|---|
| VMware vSphere ESXi 6.0 Security Technical Implementation Guide | 2016-06-07 |
Details
| Check Text ( C-64251r2_chk ) |
|---|
| Only FIPS-approved ciphers should be used. To verify that only FIPS-approved ciphers are in use, run the following command: # grep -i "^Ciphers" /etc/ssh/sshd_config If there is no output or the output is not exactly "Ciphers aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,aes192-cbc,aes256-cbc", this is a finding. |
| Fix Text (F-69431r2_fix) |
|---|
| Limit the ciphers to those algorithms which 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 aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,aes192-cbc,aes256-cbc |