Feeds

Exploit code for Kaminsky DNS bug goes wild

Still think threat is exaggerated?

High performance access to file storage

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.

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.

Much of the attack code was written by |)ruid, a researcher from the Computer Academic Underground. According to Moore, it could be used like this:

1. Bad Guy probes the target DNS to see if it's vulnerable (a couple free services can do this)

2. Bad Guy picks a domain they want to hijack for users of that DNS Server

3. Bad Guy runs the bailiwicked_domain module and takes control of that domain in the cache of that server

At this point, anyone who uses that vulnerable DNS server is going to see the wrong DNS server record for the poisoned domain

The exploits are available here and here.

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.

Moore said plenty of ISPs have yet to install the patch. To test whether your service is vulnerable, go here and click the button that says "check my DNS." If you find a service that's vulnerable, please leave a comment, or email me here (and be sure to include the IP address of the offending server). ®

High performance access to file storage

More from The Register

next story
Obama allows NSA to exploit 0-days: report
If the spooks say they need it, they get it
Parent gabfest Mumsnet hit by SSL bug: My heart bleeds, grins hacker
Natter-board tells middle-class Britain to purée its passwords
Web data BLEEDOUT: Users to feel the pain as Heartbleed bug revealed
Vendors and ISPs have work to do updating firmware - if it's possible to fix this
OpenSSL Heartbleed: Bloody nose for open-source bleeding hearts
Bloke behind the cockup says not enough people are helping crucial crypto project
One year on: diplomatic fail as Chinese APT gangs get back to work
Mandiant says past 12 months shows Beijing won't call off its hackers
Call of Duty 'fragged using OpenSSL's Heartbleed exploit'
So it begins ... or maybe not, says one analyst
German space centre endures cyber attack
Chinese code retrieved but NSA hack not ruled out
Experian subsidiary faces MEGA-PROBE for 'selling consumer data to fraudster'
US attorneys general roll up sleeves, snap on gloves
prev story

Whitepapers

Securing web applications made simple and scalable
In this whitepaper learn how automated security testing can provide a simple and scalable way to protect your web applications.
Five 3D headsets to be won!
We were so impressed by the Durovis Dive headset we’ve asked the company to give some away to Reg readers.
HP ArcSight ESM solution helps Finansbank
Based on their experience using HP ArcSight Enterprise Security Manager for IT security operations, Finansbank moved to HP ArcSight ESM for fraud management.
The benefits of software based PBX
Why you should break free from your proprietary PBX and how to leverage your existing server hardware.
Mobile application security study
Download this report to see the alarming realities regarding the sheer number of applications vulnerable to attack, as well as the most common and easily addressable vulnerability errors.