The Photon operating system must configure sshd to ignore user-specific trusted hosts lists.
An XCCDF Rule
Description
<VulnDiscussion>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.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-256555r887339_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
Navigate to and open:
/etc/ssh/sshd_config
Ensure the "IgnoreRhosts" line is uncommented and set to the following: