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XCCDF
Cisco IOS XR Router RTR Security Technical Implementation Guide
SRG-NET-000364-RTR-000204
The Cisco perimeter router must be configured to drop IPv6 packets containing an extension header with the Endpoint Identification option.
The Cisco perimeter router must be configured to drop IPv6 packets containing an extension header with the Endpoint Identification option.
An XCCDF Rule
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The Cisco perimeter router must be configured to drop IPv6 packets containing an extension header with the Endpoint Identification option.
Medium Severity
<VulnDiscussion>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, and hence 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. This option type is associated with the Nimrod Routing system and has no defining RFC document.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>