Check: ARST-RT-000150
Arista MLS EOS 4.2x Router STIG:
ARST-RT-000150
(in version v1 r1)
Title
The Arista router must be configured to have all inactive interfaces disabled. (Cat III impact)
Discussion
An inactive interface is rarely monitored or controlled and may expose a network to an undetected attack on that interface. Unauthorized personnel with access to the communication facility could gain access to a router by connecting to a configured interface that is not in use. If an interface is no longer used, the configuration must be deleted and the interface disabled. For sub-interfaces, delete sub-interfaces that are on inactive interfaces and delete sub-interfaces that are themselves inactive. If the sub-interface is no longer necessary for authorized communications, it must be deleted.
Check Content
Review the Arista router configuration. Verify the interfaces and sub-interfaces execute the commands "show ip interface brief" and "show interface status". Example of a disabled interface: interface Ethernet 8-10 description The interface is administratively shutdown shutdown If an interface is not being used but is configured or enabled, this is a finding.
Fix Text
Delete inactive sub-interfaces and disable and delete the configuration of any inactive ports on the router. Deleting the sub-interface: router(config)#no interface Ethernet8.100 Disabling the interface: router(config)#interface Ethernet 8-10 router(config-if-Et8-10)#shutdown Resetting the interface to the default-configuration: router(config)#default interface Ethernet 8
Additional Identifiers
Rule ID: SV-256001r882345_rule
Vulnerability ID: V-256001
Group Title: SRG-NET-000019-RTR-000007
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-001414 |
The information system enforces approved authorizations for controlling the flow of information between interconnected systems based on organization-defined information flow control policies. |
Controls
Number | Title |
---|---|
AC-4 |
Information Flow Enforcement |