Title

The system must be configured with a default gateway for IPv6 if the system uses IPv6, unless the system is a router. (Cat II impact)

Discussion

If a system has no default gateway defined, the system is at increased risk of man-in-the-middle, monitoring, and Denial of Service attacks.

Check Content

Check for a default route for IPv6. If the system is a VM host and acts as a router solely for the benefit of its client systems, then this rule is not applicable. # ip -6 route list | grep default If the system uses IPv6, and no results are returned, this is a finding.

Fix Text

Add a default route for IPv6. Edit /etc/sysconfig/network/routes Restart the interface. # ifdown eth0; ifup eth0

Additional Identifiers

Rule ID: SV-46111r1_rule

Vulnerability ID: V-22490

Group Title: GEN005570

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.