This exploit was recently was demonstrated By Michael Lynn at the Black Hat Security Conference. Lynn actually left his job at Internet Security Systems to deliver the presentation after ISS decided to pull the session. Shortly after a request for a temporary restraining order was filed jointly by Cisco and Internet Security Systems against the former ISS researcher Michael Lynn and the organizers of the Black Hat security conference. Lynn claimed that this vulnerability could, "Bring the internet to its knees." The dispute, however, was settled a day later, when all parties agreed to a permanent injunction barring them from further discussing the presentation that Lynn gave.

"I think I did the right thing. It was pretty scary, but the real important thing was: There was the potential of (a) serious problem", Lynn said.

What systems are affected:
-All Cisco devices running any unfixed version of Cisco IOS code that supports, and is configured for, IPv6. You can use the show ipv6 interface command to determine whether IPv6 is enabled on a system.

What systems are not affected:
-Products that are not running Cisco IOS are not affected.
- A system which supports IPv6, if not specifically configured for IPv6, is not affected.
- Products running any version of Cisco IOS that do not have IPv6 configured interfaces are not vulnerable.
- No other Cisco products are currently known to be affected by these vulnerabilities.