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The system must ignore IPv6 ICMP redirect messages.


Overview

Finding ID Version Rule ID IA Controls Severity
V-22550 GEN007860 SV-38825r1_rule ECSC-1 Medium
Description
ICMP redirect messages are used by routers to inform hosts that a more direct route exists for a particular destination. These messages modify the host's route table and are unauthenticated. An illicit ICMP redirect message could result in a man-in-the-middle attack.
STIG Date
AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE 2018-09-18

Details

Check Text ( C-37076r1_chk )
Determine if the system is configured to ignore IPv6 ICMP redirect messages. If it is not, this is a finding.
# /usr/sbin/no -o ipignoreredirects
If the value returned is not 1, this is a finding.
Fix Text (F-32348r1_fix)
Configure the system to ignore IPv6 ICMP redirect messages.
# /usr/sbin/no -p -o ipignoreredirects=1