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Disabled switch ports must be placed in an unused VLAN (do not use VLAN1).


Overview

Finding ID Version Rule ID IA Controls Severity
V-3973 NET-VLAN-002 SV-3973r2_rule Low
Description
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.
STIG Date
Layer 2 Switch Security Technical Implementation Guide 2017-12-07

Details

Check Text ( C-4035r3_chk )
Review the device configuration to determine if all disabled ports have been placed into an unused VLAN. The VLAN must not be VLAN 1.

If disabled ports are not assigned to an unused VLAN or have been placed into VLAN 1, this is a finding.
Fix Text (F-3906r2_fix)
Assign all disabled ports to an unused VLAN. Do not use VLAN1.