There has been a lot of hype about this one, but this flaw is a real threat and the working exploits are now available in the wild.
To top that, they have already been ported into Metasploit!
I hope all the major ISPs are in a patching frenzy right now and not thinking to themselves that there is no danger..
When Dan Kaminsky disclosed a critical flaw in the net’s address lookup system earlier this month, he said it was crucial internet service providers and other organizations install patches immediately. He wasn’t kidding.
Security researchers have developed two working exploits that poison vulnerable domain name system servers, allowing attackers to redirect unwitting end users to impostor sites. What’s more, the attack code has been added to Metasploit, a penetration testing tool used to test the security of computers and networks. The program, which is maintained by HD Moore, makes it easy for white hats and black hats alike to exploit vulnerable servers.
It’ll be interesting to see the aftermath of this rapid disclosure, these serious flaws don’t usually come out so fast – well not a working exploit and definitely not coded into an easy to use tool like Metasploit!
I wonder how many name servers are currently owned and serving up the wrong records? This could be a boon for phishers.
Some people have complained that Kaminsky’s bug has been shamelessly hyped. We disagree. Should there be widespread exploitation of the flaw, the result would be chaos. Attackers could taint the machines relied on by millions of people. When they typed bankofamerica.com into their browser, they’d have no way of knowing whether they were being directed to the real site or one designed to steal their money. Trust on the internet, as flawed as it may be now, would completely break down.
Currently, the exploits work only on caching servers used by ISPs and other large organizations, but Moore said they could be modified to work against client-side resolvers, which are used on desktop machines. Earlier this month, Microsoft issued an update patching the vulnerability. It was unclear if other OSes are vulnerable.
This is really serious, such DNS caching servers are used by pretty much every single large ISP and large corporate entity.
Better watch where you are surfing…but don’t worry this is the real http://www.darknet.org.uk!
The actual exploits themselves are available here:
Source: The Register