The HP FlexFabric Switch must not use the default VLAN for management traffic.

From HP FlexFabric Switch L2S Security Technical Implementation Guide

Associated with: CCI-000366

SV-80581r1_rule The HP FlexFabric Switch must not use the default VLAN for management traffic.

Vulnerability discussion

Switches use the default VLAN (i.e., VLAN 1) for in-band management and to communicate with directly connected switches using Spanning-Tree Protocol (STP), Dynamic Trunking Protocol (DTP), VLAN Trunking Protocol (VTP), and Port Aggregation Protocol (PAgP)—all untagged traffic. As a consequence, the default VLAN may unwisely span the entire network if not appropriately pruned. If its scope is large enough, the risk of compromise can increase significantly.

Check content

Review the HP FlexFabric Switch configuration and verify that the default VLAN is not used to access the switch for management. If the default VLAN is being used to access the HP FlexFabric Switch, this is a finding. display vlan 1 VLAN ID: 1 VLAN type: Static Route interface: Configured Description: VLAN 0001 Name: VLAN 0001 Tagged ports: None Untagged ports: GigabitEthernet1/0/1 GigabitEthernet1/0/2 GigabitEthernet1/0/3 GigabitEthernet1/0/4 GigabitEthernet1/0/5 GigabitEthernet1/0/6 GigabitEthernet1/0/7 GigabitEthernet1/0/8

Fix text

Configure the HP FlexFabric Switch for management access to use a VLAN other than the default VLAN. interface Vlan-interface xxxx description MGMT VLAN ip address xxx.xxx.xxx.xxx

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