The system must not forward IPv6 source-routed packets.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-22553	GEN007920	SV-26940r2_rule		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 IPv6 forwarding is enabled and the system is functioning as a router.

STIG	Date
SOLARIS 10 SPARC SECURITY TECHNICAL IMPLEMENTATION GUIDE	2017-03-08

Details

Check Text ( C-27888r3_chk )
Determine the type of zone that you are currently securing. # zonename If the zone is not the global zone, determine if any interfaces are exclusive to the zone: # dladm show-link If the output indicates "insufficient privileges" then this requirement is not applicable. If the zone is the global zone or the non-global zone has exclusive interfaces verify the system is configured to not forward IPv6 source-routed packets. # ndd /dev/ip6 ip6_forward_src_routed If the returned value is not 0, this is a finding.

Check Text ( C-27888r3_chk )

Determine the type of zone that you are currently securing.
# zonename

If the zone is not the global zone, determine if any interfaces are exclusive to the zone:
# dladm show-link

If the output indicates "insufficient privileges" then this requirement is not applicable.

If the zone is the global zone or the non-global zone has exclusive interfaces verify the system is configured to not forward IPv6 source-routed packets.
# ndd /dev/ip6 ip6_forward_src_routed

If the returned value is not 0, this is a finding.

Fix Text (F-24186r2_fix)
Configure the system to not forward IPv6 source-routed packets. # ndd -set /dev/ip6 ip6_forward_src_routed 0 Also, add this command to a system startup script.