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XCCDF
Cisco IOS XR Router RTR Security Technical Implementation Guide
SRG-NET-000364-RTR-000203
The Cisco perimeter router must be configured to drop IPv6 packets containing a Destination Option header with invalid option type values.
The Cisco perimeter router must be configured to drop IPv6 packets containing a Destination Option header with invalid option type values.
An XCCDF Rule
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The Cisco perimeter router must be configured to drop IPv6 packets containing a Destination Option header with invalid option type values.
Medium Severity
<VulnDiscussion>These options are intended to be for the Hop-by-Hop header only. The optional and extensible natures of the IPv6 extension headers require higher scrutiny since many implementations do not always drop packets with headers that it cannot recognize. Hence, this could cause a Denial-of-Service on the target device. In addition, the type, length, value (TLV) formatting provides the ability for headers to be very large.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>