Dan Kaminsky Discovers Fundamental Issue In DNS: Massive Multivendor Patch Released

Written by rmogull

Today, CERT is issuing an advisory for a massive multivendor patch to resolve a major issue in DNS that could allow attackers to easily compromise any name server (it also affects clients). Dan Kaminsky discovered the flaw early this year and has been working with a large group of vendors on a coordinated patch.

The issue is extremely serious, and all name servers should be patched as soon as possible. Updates are also being released for a variety of other platforms since this is a problem with the DNS protocol itself, not a specific implementation. The good news is this is a really strange situation where the fix does not immediately reveal the vulnerability and reverse engineering isn’t directly possible.

Dan asked for some assistance in getting the word out and was kind enough to sit down with me for an interview. We discuss the importance of DNS, why this issue is such a problem, how he discovered it, and how such a large group of vendors was able to come together, decide on a fix, keep it secret, and all issue on the same day.

US Owns your Data Now!

In a letter dated Thursday, the group, which includes the Electronic Frontier Foundation (EFF), the American Civil Liberties Union and the Business Travel Coalition, called on the House Committee on Homeland Security to ensure searches aren’t arbitrary or overly invasive. They also urged the passage of legislation outlawing abusive searches.

The letter comes 10 days after a US appeals court ruled Customs and Border Protection (CBP) agents have the right to rummage through electronic devices even if they have no reason to suspect the hardware holds illegal contents. Not only are they free to view the files during passage; they are also permitted to copy the entire contents of a device. There are no stated policies about what can and can’t be done with the data.

I hope the government takes some notice of the letter and the worries over this legislation, it is something that would bother a lot of people. Especially those from European countries where privacy is an utmost concern and strongly protected by the government.

The lack of guidelines as to what can be done with the data are worrying too, what if you have commercially valuable or proprietary information there…can they distribute it freely after copying it from you?

Several of the groups are also providing advice to US-bound travelers carrying electronic devices. The Association of Corporate Travel Executives is encouraging members to remove photos, financial information and other personal data before leaving home. This is good advice even if you’re not traveling to the US. There is no reason to store five years worth of email on a portable machine.

In this posting, the EFF agrees that laptops, cell phones, digital cameras and other gizmos should be cleaned of any sensitive information. Then, after passing through customs, travelers can download the data they need, work on it, transmit it back and then digitally destroy the files before returning.

The post also urges the use of strong encryption to scramble sensitive data, although it warns this approach is by no means perfect. For one thing, CBP agents are free to deny entry to travelers who refuse to divulge their passwords. They may also be able to seize the laptop.