The system must not send IPv6 ICMP redirects.

From HP-UX 11.31 Security Technical Implementation Guide

Associated with IA controls: ECSC-1

Associated with: CCI-001551

SV-26939r1_rule The system must not send IPv6 ICMP redirects.

Vulnerability discussion

ICMP redirect messages are used by routers to inform hosts of a more direct route existing for a particular destination. These messages contain information from the system's route table possibly revealing portions of the network topology.

Check content

Determine if the system is configured to not send IPv6 ICMP redirect messages. # ndd -get /dev/ip6 ip6_send_redirects If the command returns 1, this is a finding.

Fix text

Configure the system to not send IPv6 ICMP redirect messages. # ndd -set /dev/ip6 ip6_send_redirects 0 Edit /etc/rc.config.d/nddconf: TRANSPORT_NAME[index]=ip6 NDD_NAME[index]=ip6_send_redirects NDD_VALUE[index]=0 Where: index is the next available integer value of the nddconf file. n is a number: either 1 to turn the feature ON or 0 to turn it OFF.

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