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

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-206894	SRG-NET-000273	SRG-NET-000273-IDPS-00204	SV-206894r383206_rule	2024-12-05	3

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.

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.

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