Title

The Cisco switch must produce audit records containing information to establish where the events occurred. (Cat II impact)

Discussion

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.

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. Note: log-input can only apply to interface bound ACLs. ip access-list extended BLOCK_INBOUND deny icmp any any log-input If the switch 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.

Fix Text

Configure the log-input parameter after any deny statements to provide the location as to where packets have been dropped via an ACL: SW1(config)#ip access-list extended BLOCK_INBOUND SW1(config-ext-nacl)#deny icmp any any log-input

Additional Identifiers

Rule ID: SV-220581r960897_rule

Vulnerability ID: V-220581

Group Title: SRG-APP-000097-NDM-000227

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.