Check: CISC-RT-000237
Cisco IOS XE Switch RTR STIG:
CISC-RT-000237
(in versions v2 r5 through v2 r1)
Title
The Cisco switch must not be configured to use IPv6 Site Local Unicast addresses. (Cat II impact)
Discussion
As currently defined, site local addresses are ambiguous and can be present in multiple sites. The address itself does not contain any indication of the site to which it belongs. The use of site-local addresses has the potential to adversely affect network security through leaks, ambiguity, and potential misrouting as documented in section 2 of RFC3879. RFC3879 formally deprecates the IPv6 site-local unicast prefix FEC0::/10 as defined in RFC3513.
Check Content
Review the switch configuration to ensure FEC0::/10 IPv6 addresses are not defined. If IPv6 Site Local Unicast addresses are defined, this is a finding.
Fix Text
Configure the switch using only authorized IPv6 addresses.
Additional Identifiers
Rule ID: SV-237756r648787_rule
Vulnerability ID: V-237756
Group Title: SRG-NET-000512-RTR-000013
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-000366 |
The organization implements the security configuration settings. |
Controls
Number | Title |
---|---|
CM-6 |
Configuration Settings |