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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-29709r1_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.
STIG Date
SOLARIS 10 SPARC SECURITY TECHNICAL IMPLEMENTATION GUIDE 2018-04-10

Details

Check Text ( C-30049r1_chk )
Check the system for an IPF rule blocking outgoing source-routed packets.

Procedure:
# ipfstat -o

Examine the list for rules such as:
block out log quick all with opt lsrr
block out log quick all with opt ssrr

If the listed rules do not block both lsrr and ssrr options, this is a finding.
Fix Text (F-26887r1_fix)
Edit /etc/ipf/ipf.conf and add rules to block outgoing source-routed packets, such as:

block out log quick all with opt lsrr
block out log quick all with opt ssrr

Reload the IPF rules.
Procedure:

# ipf -Fa -A -f /etc/ipf/ipf.conf