The Photon operating system must configure sshd to ignore user-specific trusted hosts lists.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-256555 | SRG-OS-000480-GPOS-00227 | PHTN-30-000086 | SV-256555r991589_rule | 2024-12-16 | 1 |
Description
Secure Shell (SSH) trust relationships enable trivial lateral spread after a host compromise and therefore must be explicitly disabled. Individual users can have a local list of trusted remote machines, which must also be ignored while disabling host-based authentication generally.
ℹ️ Check
At the command line, run the following command:
# sshd -T|&grep -i IgnoreRhosts
Expected result:
IgnoreRhosts yes
If the output does not match the expected result, this is a finding.
✔️ Fix
Navigate to and open:
/etc/ssh/sshd_config
Ensure the "IgnoreRhosts" line is uncommented and set to the following:
IgnoreRhosts yes
At the command line, run the following command:
# systemctl restart sshd.service