Check: CISC-ND-000720
Cisco IOS XR Router NDM STIG:
CISC-ND-000720
(in versions v2 r5 through v2 r3)
Title
The Cisco router must be configured to terminate all network connections associated with device management after five minutes of inactivity. (Cat I impact)
Discussion
Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on the console or console port that has been left unattended. In addition, quickly terminating an idle session will also free up resources committed by the managed network element. Terminating network connections associated with communications sessions includes, for example, de-allocating associated TCP/IP address/port pairs at the operating system level, or de-allocating networking assignments at the application level if multiple application sessions are using a single, operating system-level network connection. This does not mean that the device terminates all sessions or network access; it only ends the inactive session and releases the resources associated with that session.
Check Content
Review the Cisco router configuration to verify that all network connections associated with a device management have an idle timeout value set to five minutes or less as shown in the following example: line console … … … exec-timeout 5 0 ! line default … … … exec-timeout 5 0 transport input ssh If the Cisco router is not configured to terminate all network connections associated with a device management after five minutes of inactivity, this is a finding.
Fix Text
Set the idle timeout value to five minutes or less on all configured login classes as shown in the example below. RP/0/0/CPU0:R3(config)#line con RP/0/0/CPU0:R3(config-line)#exec-timeout RP/0/0/CPU0:R3(config)#line default RP/0/0/CPU0:R3(config-line)#exec-timeout 5 0
Additional Identifiers
Rule ID: SV-216532r916342_rule
Vulnerability ID: V-216532
Group Title: SRG-APP-000190-NDM-000267
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-001133 |
The information system terminates the network connection associated with a communications session at the end of the session or after an organization-defined time period of inactivity. |
Controls
Number | Title |
---|---|
SC-10 |
Network Disconnect |