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The Cisco ASA remote access VPN server must be configured to generate log records containing information to establish where the events occurred.


Overview

Finding ID Version Rule ID IA Controls Severity
V-239972 CASA-VN-000510 SV-239972r666322_rule Medium
Description
Without establishing where events occurred, it is impossible to establish, correlate, and investigate the events leading up to an outage or attack. 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 VPN gateway components, modules, device identifiers, node names, and functionality. Associating information about where the event occurred within the network provides a means of investigating an attack, recognizing resource utilization or capacity thresholds, or identifying an improperly configured VPN gateway.
STIG Date
Cisco ASA VPN Security Technical Implementation Guide 2021-08-16

Details

Check Text ( C-43205r666320_chk )
Review the ASA configuration to determine if VPN events are logged as shown in the example below.

logging class vpn trap notifications
logging class vpnc trap notifications
logging class vpnfo trap notifications
logging class webfo trap notifications
logging class webvpn trap notifications
logging class svc trap notifications

Note: A logging list can be used as an alternative to using class.

If the ASA does not generate log records containing information to establish where the events occurred, this is a finding.
Fix Text (F-43164r666321_fix)
Configure the ASA to generate log records containing information to establish where the events occurred as shown in the example below.

ciscoasa(config)# logging class vpn trap notifications
ciscoasa(config)# logging class vpnc trap notifications
ciscoasa(config)# logging class vpnfo trap notifications
ciscoasa(config)# logging class webvpn trap notifications
ciscoasa(config)# logging class webfo trap notifications
ciscoasa(config)# logging class svc trap notifications
ciscoasa(config)# end