Cisco IOS XR Router NDM STIG Version Comparison

There are 2 differences between versions v2 r3 (June 7, 2023) (the "left" version) and v2 r5 (Jan. 24, 2024) (the "right" version).

Check CISC-ND-000290 was changed between these two versions. Green, underlined text was added, red, struck-out text was removed.

The regular view of the left check and right check may be easier to read.

Title

The Cisco router must produce audit records containing information to establish where the events occurred.

Check Content

Review the deny statements in all interface ACLs to determine if the log-input parameter has been configured as shown in the example below. ipv4 below. Note: log-input can only apply to interface bound ACLs. ipv4 access-list BLOCK_INBOUND 10 deny icmp any any log-input If the router is not configured with the log-input parameter after any deny statements to note where packets have been dropped via an ACL, this is a finding.

Discussion

In order to compile an accurate risk assessment and provide forensic analysis, it is essential for security personnel to know where events occurred, such as device hardware components, device software modules, session identifiers, filenames, host names, and functionality. Associating information about where the event occurred within the network device provides a means of investigating an attack; recognizing resource utilization or capacity thresholds; or identifying an improperly configured device.

Fix

Configure the log-input parameter after any deny statements to provide the location as to where packets have been dropped via an ACL. RP/0/0/CPU0:R3(config)#ipv4 access-list BLOCK_INBOUND RP/0/0/CPU0:R3(config-ipv4-acl)#deny icmp any any log-input