The IDPS must block malicious ICMP packets by properly configuring ICMP signatures and rules.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-206894	SRG-NET-000273-IDPS-00204	SV-206894r383206_rule		Medium

Description

Internet Control Message Protocol (ICMP) messages are used to provide feedback about problems in the network. These messages are sent back to the sender to support diagnostics. However, some messages can also provide host information, network topology, and a covert channel that may be exploited by an attacker. Given the prevalence of ICMP traffic on the network, monitoring for malicious ICMP traffic would be cumbersome. Vendors provide signatures and rules which filter for known ICMP traffic exploits.

STIG	Date
Intrusion Detection and Prevention Systems Security Requirements Guide	2025-05-19

Details

Check Text (C-7148r298194_chk)

Verify the IDPS blocks malicious ICMP packets by properly configuring ICMP signatures and rules.

If the IDPS does not block malicious ICMP packets by properly configuring ICMP signatures and rules, this is a finding.

Fix Text (F-7148r298195_fix)

Configure the IDPS to block malicious ICMP packets by properly configuring ICMP signatures and rules.