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The system must not forward IPv4 source-routed packets.


Overview

Finding ID Version Rule ID IA Controls Severity
V-12002 GEN003600 SV-27420r1_rule ECSC-1 Medium
Description
Source-routed packets allow the source of the packet to suggest that routers forward the packet along a different path than configured on the router, which can be used to bypass network security measures. This requirement applies only to the forwarding of source-routed traffic, such as when IPv4 forwarding is enabled and the system is functioning as a router.
STIG Date
SOLARIS 9 SPARC SECURITY TECHNICAL IMPLEMENTATION GUIDE 2015-10-01

Details

Check Text ( C-28606r1_chk )
# ndd /dev/ip ip_forward_src_routed
If the returned value is not 0, this is a finding.
Fix Text (F-24692r1_fix)
Configure the system to not forward IPv4 source-routed packets.
Procedure:
# ndd /dev/ip ip_forward_src_routed 0

This command must also be added to a system startup script.