The Arista Multilayer Switch must re-authenticate 802.1X connected devices every hour.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-60829	AMLS-L2-000150	SV-75285r1_rule		Medium

Description
Without re-authentication, users may access resources or perform tasks for which they do not have authorization. In addition to the re-authentication requirements associated with session locks, organizations may require re-authentication of individuals and/or devices in other situations, including (but not limited to) the following circumstances: (i) When authenticators change; (ii) When roles change; (iii) When security categories of information systems change; (iv) When the execution of privileged functions occurs; (v) After a fixed period of time; or (vi) Periodically. Within the DoD, the minimum circumstances requiring re-authentication are privilege escalation and role changes. This requirement only applies to components where this is specific to the function of the device or has the concept of user authentication (e.g., VPN or ALG capability). This does not apply to authentication for the purpose of configuring the device itself (i.e., device management).

Description

Without re-authentication, users may access resources or perform tasks for which they do not have authorization. In addition to the re-authentication requirements associated with session locks, organizations may require re-authentication of individuals and/or devices in other situations, including (but not limited to) the following circumstances: (i) When authenticators change; (ii) When roles change; (iii) When security categories of information systems change; (iv) When the execution of privileged functions occurs; (v) After a fixed period of time; or (vi) Periodically. Within the DoD, the minimum circumstances requiring re-authentication are privilege escalation and role changes. This requirement only applies to components where this is specific to the function of the device or has the concept of user authentication (e.g., VPN or ALG capability). This does not apply to authentication for the purpose of configuring the device itself (i.e., device management).

STIG	Date
Arista MLS DCS-7000 Series L2S Security Technical Implementation Guide	2016-03-29

Details

Check Text ( C-61775r1_chk )
This requirement only applies to devices required to employ 802.1X. Verify the Arista Multilayer Switch re-authenticates 802.1X connected devices every hour. If the Arista Multilayer Switch does not re-authenticate 802.1X connected devices, this is a finding. This can be viewed via the "show dot1x all" command. Under the interface configuration for the .1X connected port, the following statements must be present: ReauthPeriod : 3600 seconds If the device does not require re-authentication, or if the re-authentication period is longer than 60 minutes, this is a finding.

Check Text ( C-61775r1_chk )

This requirement only applies to devices required to employ 802.1X.

Verify the Arista Multilayer Switch re-authenticates 802.1X connected devices every hour. If the Arista Multilayer Switch does not re-authenticate 802.1X connected devices, this is a finding.

This can be viewed via the "show dot1x all" command. Under the interface configuration for the .1X connected port, the following statements must be present:

ReauthPeriod : 3600 seconds

If the device does not require re-authentication, or if the re-authentication period is longer than 60 minutes, this is a finding.

Fix Text (F-66539r1_fix)
Configure 802.1X on the switch, using the following mandatory parameters for all applicable interfaces. Replace the bracketed variable with the applicable value. config interface Ethernet[X] switchport access vlan [Y] dot1x pae authenticator dot1x reauthentication dot1x port-control auto dot1x host-mode single-host dot1x timeout quiet-period [value] dot1x timeout reauth-period 3600 dot1x max-reauth-req [value] For the global configuration, include the following command statements from the global configuration mode interface: logging level DOT1X informational aaa authentication dot1x default group radius dot1x system-auth-control

Fix Text (F-66539r1_fix)

Configure 802.1X on the switch, using the following mandatory parameters for all applicable interfaces. Replace the bracketed variable with the applicable value.

config
interface Ethernet[X]
switchport access vlan [Y]
dot1x pae authenticator
dot1x reauthentication
dot1x port-control auto
dot1x host-mode single-host
dot1x timeout quiet-period [value]
dot1x timeout reauth-period 3600
dot1x max-reauth-req [value]

For the global configuration, include the following command statements from the global configuration mode interface:

logging level DOT1X informational
aaa authentication dot1x default group radius
dot1x system-auth-control