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The system must ignore IPv4 ICMP redirect messages.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-22416 | GEN003609 | SV-26630r1_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 |
|---|---|
| Solaris 9 X86 Security Technical Implementation Guide | 2013-01-10 |
Details
| Check Text ( C-27667r1_chk ) |
|---|
| Verify the system does not accept IPv4 ICMP redirect messages. Procedure: # ndd -get /dev/ip ip_ignore_redirect If the result is not 1, this is a finding. |
| Fix Text (F-23873r1_fix) |
|---|
| Configure the system to not accept IPv4 ICMP redirect messages. Procedure: # ndd -set /dev/ip ip_ignore_redirect 1 This command must also be added to a system startup script. |