The Red Hat Enterprise Linux operating system must be configured so that the SSH public host key files have mode 0644 or less permissive.
An XCCDF Rule
Description
<VulnDiscussion>If a public host key file is modified by an unauthorized user, the SSH service may be compromised.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-204596r603261_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
Note: SSH public key files may be found in other directories on the system depending on the installation.
Change the mode of public host key files under "/etc/ssh" to "0644" with the following command:
# chmod 0644 /etc/ssh/*.key.pub