The Cisco switch must be configured to have all inactive Layer 3 interfaces disabled.
An XCCDF Rule
Description
<VulnDiscussion>An inactive interface is rarely monitored or controlled and may expose a network to an undetected attack on that interface. Unauthorized personnel with access to the communication facility could gain access to a switch by connecting to a configured interface that is not in use. If an interface is no longer used, the configuration must be deleted and the interface disabled. For sub-interfaces, delete sub-interfaces that are on inactive interfaces and delete sub-interfaces that are inactive. If the sub-interface is no longer necessary for authorized communications, it must be deleted.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-220424r622190_rule
- Severity
- Low
- References
- Updated
Remediation - Manual Procedure
Disable all inactive interfaces as shown below:
SW1(config)#interface GigabitEthernet3
SW1(config-if)#shutdown
SW1(config)#interface GigabitEthernet4
SW1(config-if)#shutdown