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 X86 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.