The Photon operating system must configure Secure Shell (SSH) to disallow compression of the encrypted session stream.
An XCCDF Rule
Description
<VulnDiscussion>If compression is allowed in an SSH connection prior to authentication, vulnerabilities in the compression software could result in compromise of the system from an unauthenticated connection.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-258878r991589_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
Navigate to and open:
/etc/ssh/sshd_config
Ensure the "Compression" line is uncommented and set to the following: