One day after a security company accidentally posted details of a serious flaw in the Internet’s Domain Name System (DNS), hackers are saying that software that exploits this flaw is sure to pop up soon. Several hackers are almost certainly already developing attack code for the bug, and it will most likely crop up within the next few days, said Dave Aitel, chief technology officer at security vendor Immunity. His company will eventually develop sample code for its Canvas security testing software too, a task he expects to take about a day, given the simplicity of the attack. “It’s not that hard,” he said. “You’re not looking at a DNA-cracking effort.” The flaw, a variation on what’s known as a cache poisoning attack, was announced on July 8 by IOActive researcher Dan Kaminsky, who planned to disclose full details of the bug during an Aug. 6 presentation at the Black Hat conference.
That plan was thwarted Monday, when someone at Matasano accidentally posted details of the flaw ahead of schedule. Matasano quickly removed the post and apologized for its mistake, but it was too late. Details of the flaw soon spread around the Internet. The attack can be used to redirect victims to malicious servers on the Internet by targeting the DNS servers that serve as signposts for all of the Internet’s traffic. By tricking an Internet service provider’s (ISPs) servers into accepting bad information, attackers could redirect that company’s customers to malicious Web sites without their knowledge. Although a software fix is now available for most users of DNS software, it can take time for these updates to work their way through the testing process and actually get installed on the network.
Source: PC world
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