The Cisco switch must have all disabled switch ports assigned to an unused VLAN.
An XCCDF Rule
Description
<VulnDiscussion>It is possible that a disabled port that is assigned to a user or management VLAN becomes enabled by accident or by an attacker and as a result gains access to that VLAN as a member.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-220690r539671_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
Assign all switch ports not in use to an inactive VLAN.
Step 1: Assign the disabled interfaces to an inactive VLAN.
SW1(config)# int e1/81-128
SW1(config-if-range)# switchport access vlan 999