Title

The Cisco ASA must be configured to send an alert to, at a minimum, to the system administrator when malicious code is detected. (Cat II impact)

Discussion

Without an alert, security personnel may be unaware of an impending failure of the audit capability, and the ability to perform forensic analysis and detect rate-based and other anomalies will be impeded. The IDPS generates an immediate (within seconds) alert which notifies designated personnel of the incident. Sending a message to an unattended log or console does not meet this requirement since that will not be seen immediately. These messages should include a severity level indicator or code as an indicator of the criticality of the incident.

Check Content

Verify email server and email addresses have been defined. Step 1: Navigate to Policies >> Actions >> Alerts. Step 2: From the Create Alert drop-down menu, choose Create Email Alert. Step 3: Verify the email address is that of the system administrator. ---------------------------------------- Verify that Advanced Malware Protection is configured to generate alerts. Step 1: Navigate to Policies >> Actions >> Alerts Step 2: Click the Advanced Malware Protections Alerts tab. Step 3: In the Alerts section, verify that an email alert has been selected. Note: The above example is using the Firepower Management Center. If the ASA is not configured to send an alert to, at a minimum, the system administrator when malicious code is detected, this is a finding.

Fix Text

Configure email server and email addresses to send alerts to the system administrator. Step 1: Navigate to Policies >> Actions >> Alerts. Step 2: From the Create Alert drop-down menu, choose Create Email Alert. Step 3: Enter a Name for the alert response. In the To field, enter the email addresses where you want to send alerts, separated by commas. In the From field, enter the email address that you want to appear as the sender of the alert. Next to Relay Host, click edit to enter mail server. Step 4: Click Save. ---------------------------------------------- Configure Advanced Malware Protection to send alerts when malware is detected. Step 1: Navigate to Policies >> Actions >> Alerts. Step 2: Click the Advanced Malware Protections Alerts tab. Step 3: In the Alerts section, choose the alert response for an email alert. Step 4: Click Save.

Additional Identifiers

Rule ID: CASA-IP-000280_rule

Vulnerability ID: CASA-IP-000280

Group Title: SRG-NET-000249-IDPS-00222

Expert Comments

CCIs tied to check.

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