Ipv6 packet security unlike ipv4, ipsec security is mandated in the ipv6 protocol specification, allowing ipv6 packet authentication andor payload encryption via the extension headers. A vulnerability in the implementation of the ip version 6 ipv6 protocol stack in cisco ios software and cisco ios xe software could allow an unauthenticated, remote attacker to cause io memory depletion on an affected device that has ipv6 enabled. You should take the time to experiment and discover new commands relating to ipv6 by using the cisco ios context sensitive help. Darrin miller is an engineer in the security technology group at cisco. May 22, 20 cisco ips got ipv6 support in version 6. An attacker could exploit this vulnerability by sending crafted ipv6 packets through the device. Oct 11, 2011 ipv6 is mostly ipv4 with larger addresses and there is no significant difference between ipv4 and ipv6 with respect to security. Ipv6 security threats and mitigations psu wikispaces. Ipv6 was developed by the internet engineering task force ietf to deal with the longanticipated problem of ipv4 address exhaustion.
Ccna security 640554 official cert guide cisco press. Its successor, ipv6, has the features and solutions the modern internet requires. The vulnerability is due to incorrect handling of ipv6 packets with a fragment header extension. As the worlds networks migrate to the ipv6 protocol, networking professionals need a clearer understanding of the security risks, threats, and challenges this transition presents. A vulnerability in the switch integrated security features of cisco ios xe software could allow an unauthenticated, remote attacker to cause an interface queue wedge. The cisco ipv6 first hop security fhs solution protects networks by mitigating these types of attacks and misconfigurations errors. Cisco should be your valued business partner to help you securely deploy ipv6 to allow your organization to continue to thrive in the next wave of ip. November29,2012 americas headquarters cisco systems, inc. It addresses ipv6 link operations vulnerabilities, as well as scalability issues in large layer2 domains. Advanced ipv6 security topics like transition options. The internet lacks effective privacy and effective authentication mechanisms beneath the application layer. In some cases linklocal addresses ipv6 is slightly more secure, and in other cases difficulties to parse the extension headers ipv6 is slightly less secure. Ipv6 firsthop security configuration guide, cisco ios release. A vulnerability in the ipv6 subsystem of cisco ios xr software release 5.
Ipv6 is mostly ipv4 with larger addresses and there is no significant difference between ipv4 and ipv6 with respect to security. An exploit could allow the attacker to cause an interface. The vulnerability is due to incorrect handling of crafted ipv6 packets. To provide security and scalability, the ipv6 snooping feature bundles several layer 2 ipv6 firsthop security features, including ipv6 neighbor discovery nd inspection, ipv6 device tracking, ipv6 address glean, and ipv6 binding table recovery.
The question mark in cisco ios to configure an ipv6 address on a cisco interface youll use the ipv6 address x. The vulnerability is triggered when an affected device processes a malformed ipv6 packet. However, ipsec is not automatically implemented, it must be configured and used with a security key exchange. Ccna security 210260 official cert guide is a bestofbreed cisco exam study guide that focuses specifically on the objectives for the ccna security implementing cisco network security iins 210260 exam. Cisco ios and ios xe software ipv6 first hop security denial. Cisco public 24 ipv6 fragmentation and cisco ios acl.
Learn what the internet protocol version 6 ipv6 is, know who has adopted it, understand the vulnerabilities causing security concerns, and learn methods used to protect networks against hacker attacks and tools in this following book chapter from the book ipv6 security. Ipv6 mandates the implementation of ipsec some organisations believe that ipsec should be used to secure all flows 15 security expert, w. Joe klein ceo disrupt6, and security sme for the ipv6 forum. Cisco security experts omar santos and john stuppi share preparation hints and testtaking tips, helping you identify areas of weakness and. Exploitation of this vulnerability can lead to information leakage on affected ios and ios xr devices, and may also result in a crash of the affected ios device. He has worked primarily on policybased admission, incident. Internet protocol, scott hogg and eric vyncke, cisco. Ipv6 and ipv4 usually operate completely independently over the same layer 2 infrastructure, so additional and. This work has included protocol security analysis and security architectures. Ipv6 security impact many security issues in ipv6 remain the same as in ipv4, but v6 also has new features that affect system and network security, as well as potentially impacting on policies and procedures. You gain a strong defense against attack vectors and widely available tools that exploit vulnerabilities. Cisco has released software updates that address this. Home downloads download cisco ccnp routing pdf study guide. Ipv6 firsthop security configuration guide, cisco ios xe.
Only tridentbased line cards on cisco asr 9000 series aggregation services. Ipv6 security protection measures for the next internet protocol as the worlds networks migrate to the ipv6 protocol, networking professionals need a clearer understanding of the security risks, threats, and challenges this transition presents. The current internet has a number of security problems. Ipv6 security reminded me of cisco router firewall security crfs by richard deal, which i also liked a lot. Praise for ipv6 essentials, third edition silvia easily distills complexity out of ipv6 to make it accessible to everyone. Cisco has the broadest support for ipv6, and ipv6 security in the industry. To understand the scale of their undertaking, their implementation case study stated this. Ipv4ipv6 security and threat comparisons sciencedirect. Ipv6 enabled commands, page 121 configuring ipv6, page 122. Ipv6 remedies these shortcomings by having two integrated options that provide security services. Darrin is responsible for systemlevel security architecture.
Internet protocol version 6 ipv6 specification, ietf rfc 2460. Crfs was cisco specific and helped readers squeeze all the networklevel security features they could from their routers. Ipv6 sourcepre x guard protection against address spoo ng from rogue or malicious users i am 2001. Multiple ipv6 addresses per interface plus the ipv4 address frequently changing source ipv6 addresses different address notations access control lists required for ipv4 and ipv6 black lists are required for ipv4 and ipv6 detecting ipv4ipv6 distributed attacks is a challenge 19. Cisco firsthopsecurity cisco name for various security features in ipv6 staged in three phases every phase will releasereleased more ipv6 security features to achieve feature parity with the ipv4 world. Ipv6 has been available for years, and 2016 marked the year when ipv6 first reached 10% deployment, a full 20 years after it was first implemented. Snort tcpdump sun solaris snoop cold ethereal analyzer. Leading networking instructor rick graziani explains all the basics simply and clearly, stepbystep, providing all the details youll need to succeed. He is actively involved in ipv6, serving as the cochair of the california ipv6 task force, and has been blogging and speaking at conferences worldwide about ipv6 since 2005.
Cisco security appliance command line configuration guide ol1008802 12 configuring ipv6 this chapter describes how to enable and configure ipv6 on the security appliance. Chapter 1 introduction to ipv6 security 3 chapter 2 ipv6 protocol security vulnerabilities 15 chapter 3 ipv6 internet security 73 chapter 4 ipv6. Cisco ios xr software ipv6 malformed packet denial of service. The transition to ipv6 affects the entire enterprise network, which connects 450 cisco offices in 90 countries. Discussions around ipv6 security have centered on ipsec though ipsec is mandatory in ipv6, the same issues with ipsec deployment remain from ipv4. Ipv6 security improvements ipv6 administration guide. As you adopt technology solutions that address todays business transitions and migrate your network to scale ipv6, we can help you prioritize critical areas of your business and network, while proactively budgeting time, money, and resources. Ccna security 210260 official cert guide cisco press. Jun 06, 2014 both ciscos internal and external plans place a large emphasis on endtoend security and testing.
Protection measures for the next internet protocol. Cisco ios software ipv6 denial of service vulnerability. Securing ipv6 in the cisco space troopers itsecurity. Now fully updated, ipv6 fundamentals offers a thorough, friendly, and easytounderstand introduction to the knowledge and skills you need to deploy and operate ipv6 networks. Also show ip route for ipv6 is now show ipv6 route. Aug 06, 2019 ipv6 firsthop security configuration guide, cisco ios xe gibraltar 16. Cisco aggregation services router 9000 series ipv6 fragment. The rise of ipv6 could give you some severe security headaches even if you have no current plans to implement the new networking protocol. Apr 01, 2016 ipv6 firsthop security configuration guide. Crfs was ciscospecific and helped readers squeeze all the networklevel security features they could from their routers.
A device that is running cisco ios software and has ipv6 enabled on a physical or logical. Leading networking instructor rick graziani explains all the basics simply and clearly, stepbystep, providing all the details youll need to. This session presents ipv6 security as contrasted with ipv4 from a threat and mitigation. A vulnerability in the parsing of malformed internet protocol version 6 ipv6 packets in cisco ios xr software for asr 9000 series aggregation services routers could allow an unauthenticated, remote attacker to cause a lockup and eventual reload of a network processor np chip and a line card processing traffic. Cisco ios and cisco ios xr contain a vulnerability when processing specially crafted ipv6 packets with a type 0 routing header present. Ipv6 firsthop security configuration guide, cisco ios xe release 3s first published. Security cisco ios ipv6 acl cisco ios firewall ipv6 support standardextended ipv6 acl ios firewall since march 200412. Ipv6 i about the tutorial internet protocol version 6 ipv6 is the latest revision of the internet protocol ip and the first version of the protocol to be widely deployed. Configuration complexity key management therefore, ipv6 will be deployed largely without cryptographic protections of any kind security in ipv6 is a much broader topic than just ipsec. Its available for free via the university librarys safari subscription.
Nevertheless, security of ipv6 protocol and ipv6 networks can still be improved, but this fact should not be an obstacle to its acceptance,usage and further development. Darrin was a security researcher with focus in the areas of identity, nac, ipv6, scada, incident response, and trust models. Cisco ios xe software switch integrated security features. Ipv6 has been available for years, and 2016 marked the year when ipv6 first reached. Ipv6enabled commands, page 121 configuring ipv6, page 122. Latif ladid president, international ipv6 forum the best vendorindependent ipv6 book available. A device that is running cisco ios software and has ipv6 enabled on a physical or logical interface is vulnerable even if ipv6 unicastrouting is globally disabled that is, the device is not routing ipv6 packets. The ah header was designed to ensure authenticity and integrity of the ip packet. Configuring ipv6 interface addressing free ccna workbook. Ipv6 security scanner halfscan6 nmap strobe netcat dos tools. Ipv6 firsthop security configuration guide, cisco ios xe gibraltar 16. Both ciscos internal and external plans place a large emphasis on endtoend security and testing.