Detections
Analytics

JUEX-RT-000870 - The Juniper perimeter router must be configured to drop IPv6 packets containing a Hop-by-Hop or Destination Option extension header with an undefined option type.

Information

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.

NOTE: Nessus has provided the target output to assist in reviewing the benchmark to ensure target compliance.

Solution

Configure the router to drop all inbound IPv6 packets containing an undefined option type value regardless of whether or not they appear in a Hop-by-Hop or Destination Option header.

set firewall family inet6 filter <name> term 1 from next-header hop-by-hop
set firewall family inet6 filter <name> term 1 from next-header dstopts
set firewall family inet6 filter <name> term 1 then log
set firewall family inet6 filter <name> term 1 then syslog
set firewall family inet6 filter <name> term 1 then discard
<additional terms>
set firewall family inet6 filter <name> term default then log
set firewall family inet6 filter <name> term default then syslog
set firewall family inet6 filter <name> term default then discard

set interfaces <interface name> unit <number> family inet6 filter input <filter name>
set interfaces <interface name> unit <number> family inet6 address <IPv6 address>.<prefix>

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_Juniper_EX_Switches_Y26M01_STIG.zip

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-7(11), CAT|II, CCI|CCI-002403, Rule-ID|SV-254059r844210_rule, STIG-ID|JUEX-RT-000870, Vuln-ID|V-254059

Plugin: Juniper

Control ID: e6611c46dfd0f8d668e17b5c480a40d0d8d80969c7ddaf783ca504805d7baf10