June 06, 2011, 5:40 PM — Hundreds of popular websites -- including Google, Facebook, Yahoo and Bing -- are participating in a 24-hour trial of a new Internet standard called IPv6 on June 8, prompting worries that hackers will exploit weaknesses in this emerging technology to launch attacks.
BACKGROUND: Large-scale IPv6 trial set for June 8
Dubbed World IPv6 Day, the IPv6 trial runs from 8 p.m. EST on Tuesday until 7:59 p.m. EST on Wednesday.
Security experts are concerned that the 400-plus corporate, government and university websites that are participating in World IPv6 Day could be hit with distributed denial of service (DDoS) or other hacking attacks during the 24-hour trial.
"In the last five months, there has been a huge increase in DDoS attacks," says Ron Meyran, director of product marketing and security at Radware, a network device company that is not participating in World IPv6 Day. "IPv6 is going to be even easier for attackers ... because IPv6 traffic will go through your deep packet inspection systems uninspected."
Meyran says another concern is that IPv6 packet headers are four times larger than IPv4 headers. This means routers, firewalls and other network devices must process more data, which makes it easier to overwhelm them in a DDoS attack.
"With a DDoS attack, you need to reach 100% utilization of the networking and security devices to saturate the services," Meyran says. The longer headers in IPv6 "must be processed completely to make routing decisions."
"I wonder if there's going to be any sort of DDoS type of things going on ... or hackers probing servers that are dual-stack enabled [running IPv6 and IPv4 at the same time],'' says Jean McManus, executive director of Verizon's Corporate Technology Organization, which is participating in World IPv6 Day. "Content providers need to be careful and watch to make sure that everything is appropriately locked down."
Many security threats related to IPv6 stem from the fact that the technology is new, so it hasn't been as well-tested or de-bugged as IPv4. Also, fewer network managers have experience with IPv6 so they aren't as familiar with writing IPv6-related rules for their firewalls or other security devices.