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Assessment Title
Rule Text
The Cisco perimeter router must be configured to drop IPv6 packets containing the NSAP address option within Destination Option header.
Description
Discussion Text
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 from RFC 1888 (OSI NSAPs and IPv6) has been deprecated by RFC 4048.
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