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The system must prevent local applications from generating source-routed packets.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-22413 | GEN003606 | SV-29707r2_rule | Medium |
| Description |
|---|
| Source-routed packets allow the source of the packet to suggest routers forward the packet along a different path than configured on the router, which can be used to bypass network security measures. |
| STIG | Date |
|---|---|
| HP-UX 11.31 Security Technical Implementation Guide | 2017-12-08 |
Details
| Check Text ( C-36508r2_chk ) |
|---|
| Check the system for an IP Filter (IPF) rule blocking outgoing source-routed packets. # ipfstat -o Examine the list for rules such as: block out log quick [all] | [from any to any] with opt lsrr block out log quick [all] | [from any to any] with opt ssrr If the listed rules do not block both lsrr and ssrr options, this is a finding. |
| Fix Text (F-31866r2_fix) |
|---|
| Edit /etc/opt/ipf/ipf.conf and add rules to block outgoing source-routed packets, such as: block out log quick [all] | [from any to any] with opt lsrr block out log quick [all] | [from any to any] with opt ssrr Reload the IPF rules: # ipf -Fa -A -f /etc/opt/ipf/ipf.conf |