The system must disable TCP reverse IP source routing.
An XCCDF Rule
Description
<VulnDiscussion>If enabled, reverse IP source routing would allow an attacker to more easily complete a three-way TCP handshake and spoof new connections.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-216377r959010_rule
- Severity
- Low
- References
- Updated
Remediation - Manual Procedure
The Network Management profile is required.
Disable reverse source routing.
# pfexec ipadm set-prop -p _rev_src_routes=0 tcp