Title

The IDPS must block malicious ICMP packets by properly configuring ICMP signatures and rules. (Cat II impact)

Discussion

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.

Check Content

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

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

Additional Identifiers

Rule ID: SV-206894r383206_rule

Vulnerability ID: V-206894

Group Title: SRG-NET-000273

Expert Comments

CCIs tied to check.

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