Finding ID | Version | Rule ID | IA Controls | Severity |
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V-39404 | SRG-OS-000159-ESXI5 | SV-51262r2_rule | Medium |
Description |
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DoD information systems are required to use FIPS 140-2 approved ciphers. SSHv2 ciphers meeting this requirement are 3DES and AES. |
STIG | Date |
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VMware ESXi Server 5.0 Security Technical Implementation Guide | 2017-01-06 |
Check Text ( C-46678r2_chk ) |
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Disable lock down mode. Enable the ESXi Shell. Check the SSH client configuration for allowed ciphers. # grep -i ciphers /etc/ssh/ssh_config | grep -v '^#' If the returned ciphers list contains any cipher not starting with 3des or aes, this is a finding. If the /etc/ssh/ssh_config file does not exist or the Ciphers option is not set, this is not a finding. Re-enable lock down mode. |
Fix Text (F-44417r1_fix) |
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Disable lock down mode. Enable the ESXi Shell. Edit the SSH client configuration and add/modify the "Ciphers" configuration (example: 3des-ctr, aes128-ctr, aes192-ctr, aes256-ctr). # vi /etc/ssh/ssh_config Re-enable lock down mode. |