The SLES for vRealize must not have 6to4 enabled.

From VMware vRealize Operations Manager 6.x SLES Security Technical Implementation Guide

Associated with: CCI-000382

SV-99215r1_rule The SLES for vRealize must not have 6to4 enabled.

Vulnerability discussion

6to4 is an IPv6 transition mechanism that involves tunneling IPv6 packets encapsulated in IPv4 packets on an ad hoc basis. This is not a preferred transition strategy and increases the attack surface of SLES for vRealize.

Check content

Check SLES for vRealize for any active "6to4" tunnels without specific remote addresses: # ip tun list | grep "remote any" | grep "ipv6/ip" If any results are returned the "tunnel" is the first field. If any results are returned, this is a finding.

Fix text

Disable the active "6to4" tunnel: # ip link set down Add this command to a startup script, or remove the configuration creating the tunnel.

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