The system must not forward IPv4 source-routed packets.

From AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE

Associated with IA controls: ECSC-1

Associated with: CCI-001551

SV-38948r1_rule The system must not forward IPv4 source-routed packets.

Vulnerability discussion

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. 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.

Check content

# /usr/sbin/no -o ipsrcrouteforward If the returned value is not 0, this is a finding.

Fix text

# /usr/sbin/no -po "ipsrcrouteforward=0"

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