This document discusses the security implications of native IPv6 support and IPv6 transition/co-existence technologies on “IPv4-only” networks, and describes possible mitigations for the aforementioned issues.
You can download it from the following link: https://packetstormsecurity.com/files/download/116236/draft-ietf-opsec-ipv6-implications-on-ipv4-nets-00.txt
Source: https://packetstormsecurity.com/files/116236/Security-Implications-Of-IPv6-On-IPv4-Networks.html