V-14693
The network device must be configured to ensure IPv6 Site Local Unicast addresses are not defined in the enclave, (FEC0::/10). Note that this consist of all addresses that begin with FEC, FED, FEE and FEF.
Finding ID
NET-IPV6-025
Rule ID
SV-15397r2_rule
Severity
CCE
(None)
Group Title
IPv6 Site Local Unicast ADDR must not be defined
CCI
(None)
Target Key
(None)
Documentable
No
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 defined in RFC3513, i.e., 1111111011 binary or FEC0::/10.
Fix Text
Configure the device using authorized IP addresses.
Check Content
Review the device configuration to ensure FEC0::/10 IP addresses are not defined. If FEC0::/10 IP addresses are defined, this is a finding.
Responsibility
Information Assurance Officer
IA Controls
ECSC-1