The vCenter Envoy service must set a limit on remote connections.
An XCCDF Rule
Description
<VulnDiscussion>Envoy client connections must be limited to preserve system resources and continue servicing connections without interruption. Without a limit set, the system would be vulnerable to a trivial denial-of-service attack where connections are created en masse and vCenter resources are entirely consumed. Envoy comes hard coded with a tested and supported value for "maxRemoteHttpsConnections" and "maxRemoteHttpConnections" that must be verified and maintained.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-259165r960735_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
Navigate to and open:
/etc/vmware-rhttpproxy/config.xml
Locate the <config>/<envoy>/<L4Filter> block and configure it as follows: