The Photon operating system must configure sshd to ignore user-specific "known_host" files.
An XCCDF Rule
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 that must also be ignored while disabling host-based authentication generally.
- ID
- SV-256556r991589_rule
- Version
- PHTN-30-000087
- Severity
- Medium
- References
- Updated
Remediation Templates
A Manual Procedure
Navigate to and open:
/etc/ssh/sshd_config
Ensure the "IgnoreUserKnownHosts" line is uncommented and set to the following: