STIGQter: STIG Summary: Router Security Requirements Guide Version: 4 Release: 2 Benchmark Date: 23 Apr 2021:

The perimeter router must be configured to drop IPv6 packets containing a Hop-by-Hop header with invalid option type values.

DISA Rule

SV-220149r604135_rule

Vulnerability Number

V-220149

Group Title

SRG-NET-000364

Rule Version

SRG-NET-000364-RTR-000202

Severity

CAT II

CCI(s)

• CCI-002403 - The information system only allows incoming communications from organization-defined authorized sources routed to organization-defined authorized destinations.

Weight

10

Fix Recommendation

Configure the router to drop IPv6 packets containing a Hop-by-Hop header with option type values of 0x04 (Tunnel Encapsulation Limit), 0xC9 (Home Address Destination), or 0xC3 (NSAP Address).

Check Contents

This requirement is not applicable for the DODIN Backbone.

Review the router configuration to determine if filters are bound to the applicable interfaces to drop IPv6 packets containing a Hop-by-Hop header with option type values of 0x04 (Tunnel Encapsulation Limit), 0xC9 (Home Address Destination), or 0xC3 (NSAP Address).

Note: Because hop-by-hop and destination options have the same exact header format, they are combined under the dest-option-type keyword. Since Hop-by-Hop and Destination Option headers have non-overlapping types, the dest-option-type to match either can be used. The Hop-by-Hop and Destination Option headers can be filtered via protocol 0 and 60 respectively.

If the router is not configured to drop IPv6 packets containing a Hop-by-Hop header with invalid option type values, this is a finding.

Vulnerability Number

V-220149

Documentable

False

Rule Version

SRG-NET-000364-RTR-000202

Severity Override Guidance

This requirement is not applicable for the DODIN Backbone.

Review the router configuration to determine if filters are bound to the applicable interfaces to drop IPv6 packets containing a Hop-by-Hop header with option type values of 0x04 (Tunnel Encapsulation Limit), 0xC9 (Home Address Destination), or 0xC3 (NSAP Address).

Note: Because hop-by-hop and destination options have the same exact header format, they are combined under the dest-option-type keyword. Since Hop-by-Hop and Destination Option headers have non-overlapping types, the dest-option-type to match either can be used. The Hop-by-Hop and Destination Option headers can be filtered via protocol 0 and 60 respectively.

If the router is not configured to drop IPv6 packets containing a Hop-by-Hop header with invalid option type values, this is a finding.

Check Content Reference

M

Target Key

2917

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