Check: CISC-RT-000060
Cisco IOS XE Router RTR STIG:
CISC-RT-000060
(in versions v2 r9 through v1 r1)
Title
The Cisco 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 router configuration and verify that inactive interfaces have been disabled as shown below: interface GigabitEthernet3 shutdown ! interface GigabitEthernet4 shutdown If an interface is not being used but is configured or enabled, this is a finding.
Fix Text
Disable all inactive interfaces as shown below: R4(config)#interface GigabitEthernet3 R4(config-if)#shutdown R4(config)#interface GigabitEthernet4 R4(config-if)#shutdown
Additional Identifiers
Rule ID: SV-216646r531086_rule
Vulnerability ID: V-216646
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 |