The Photon operating system must send TCP timestamps.
An XCCDF Rule
Description
<VulnDiscussion>TCP timestamps are used to provide protection against wrapped sequence numbers. It is possible to calculate system uptime (and boot time) by analyzing TCP timestamps. These calculated uptimes can help a bad actor in determining likely patch levels for vulnerabilities.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-258894r933743_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
Navigate to and open:
/etc/sysctl.d/zz-stig-hardening.conf
Add or update the following line: