The hardware Voice Video Endpoint not supporting 802.1x must be configured to use MAC Authentication Bypass (MAB) on the access switchport.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-66693	SRG-NET-000512-VVEP-00006	SV-81183r1_rule		Medium

Description
IEEE 802.1x is a protocol used to control access to LAN services via a network access switchport or wireless access point that requires a device or user to authenticate to the network element and become authorized by the authentication server before accessing the network. This standard is used to activate the network access switchport limiting traffic to a specific VLAN or install traffic filters. Implementing 802.1x port security on each access switchport denies all other MAC users, which eliminates the security risk of additional users attaching to a switch to bypass authentication. The hardware Voice Video Endpoint must be an 802.1x supplicant and integrate into the 802.1x access control system. When 802.1x is used, all devices connecting to the LAN are required to use 802.1x. A Voice Video Endpoint with a PC port may break 802.1x LAN access control mechanisms when the network access switchport is authorized during the Voice Video Endpoint authentication to the network. This condition may permit devices connected to the PC port to access the LAN. Daisy chaining devices on a single LAN drop protected by 802.1x must be prohibited unless the PC port is an 802.1x authenticator and configured to work with an approved authentication server. Disabling the PC port requires the network access switchports are configured with the appropriate VLAN for the VVoIP or VTC traffic and placing the disabled PC port traffic on the unused VLAN. MAC Address Bypass (MAB) is a possible mitigation for this vulnerability.

Description

IEEE 802.1x is a protocol used to control access to LAN services via a network access switchport or wireless access point that requires a device or user to authenticate to the network element and become authorized by the authentication server before accessing the network. This standard is used to activate the network access switchport limiting traffic to a specific VLAN or install traffic filters. Implementing 802.1x port security on each access switchport denies all other MAC users, which eliminates the security risk of additional users attaching to a switch to bypass authentication. The hardware Voice Video Endpoint must be an 802.1x supplicant and integrate into the 802.1x access control system. When 802.1x is used, all devices connecting to the LAN are required to use 802.1x. A Voice Video Endpoint with a PC port may break 802.1x LAN access control mechanisms when the network access switchport is authorized during the Voice Video Endpoint authentication to the network. This condition may permit devices connected to the PC port to access the LAN. Daisy chaining devices on a single LAN drop protected by 802.1x must be prohibited unless the PC port is an 802.1x authenticator and configured to work with an approved authentication server. Disabling the PC port requires the network access switchports are configured with the appropriate VLAN for the VVoIP or VTC traffic and placing the disabled PC port traffic on the unused VLAN. MAC Address Bypass (MAB) is a possible mitigation for this vulnerability.

STIG	Date
Voice Video Endpoint Security Requirements Guide	2019-03-15

Details

Check Text ( C-67319r1_chk )
If the Voice Video Endpoint is not a hardware endpoint, this check procedure is Not Applicable. Verify the hardware Voice Video Endpoint not supporting 802.1x is configured to use MAB on the access switchport. If the hardware Voice Video Endpoint not supporting 802.1x is not configured to use MAB on the access switchport, this is a finding.

Fix Text (F-72769r1_fix)
Configure the hardware Voice Video Endpoint not supporting 802.1x to use MAB on the access switchport.