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The network element must ensure that ICMPv6 unreachable notifications and redirects are disabled on all external facing interfaces.


Overview

Finding ID Version Rule ID IA Controls Severity
V-14670 NET-IPV6-016 SV-15320r2_rule Medium
Description
The Internet Control Message Protocol version 6 (ICMPv6) supports IPv6 traffic by relaying information about paths, routes, and network conditions. Routers automatically send ICMPv6 messages under a wide variety of conditions. ICMPv6 messages are commonly used by attackers for network mapping and diagnosis: Host unreachable, and Redirect.
STIG Date
Perimeter L3 Switch Security Technical Implementation Guide 2018-11-27

Details

Check Text ( C-12786r2_chk )
Review the active configuration to determine if controls have been defined to ensure router has ICMPv6 unreachables or redirects disabled any external interfaces.
Fix Text (F-14131r1_fix)
The network element configuration must be changed to ensure ICMPv6 unreachables and redirects are disabled at all external interfaces.