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V-55355

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

Finding ID
SRG-NET-000273-IDPS-00204
Rule ID
SV-69601r1_rule
Severity
Cat II
CCE
(None)
Group Title
SRG-NET-000273-IDPS-00204
CCI
CCI-001312
Target Key
(None)
Documentable
No
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.

Fix Text

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

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.