Check: GEN003609
AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE:
GEN003609
(in versions v1 r14 through v1 r10)
Title
The system must ignore IPv4 ICMP redirect messages. (Cat II impact)
Discussion
ICMP redirect messages are used by routers to inform hosts 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.
Check Content
# /usr/sbin/no -o ipignoreredirects If the value returned is not 1, this is a finding.
Fix Text
Configure the system to ignore IPv4 ICMP redirect messages. #/usr/sbin/no -p -o ipignoreredirects=1
Additional Identifiers
Rule ID: SV-38801r1_rule
Vulnerability ID: V-22416
Group Title: GEN003609
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-001503 |
The organization controls changes to the configuration settings in accordance with organizational policies and procedures. |
| CCI-001551 |
The organization defines approved authorizations for controlling the flow of information between interconnected systems. |