DNS server attacks begin using BIND software flaw

Analysts predicted attackers would quickly figure out how to take advantage of the flaw

Attackers have started exploiting a flaw in the most widely used software for the DNS (Domain Name System), which translates domain names into IP addresses.

Last week, a patch was issued for the denial-of-service flaw, which affects all versions of BIND 9, open-source software originally developed by the University of California at Berkeley in the 1980s.

The flaw can be exploited with a single packet, crashing both authoritative and recursive DNS servers. Security analysts predicted that attackers would quickly figure out how to exploit the flaw, which has now happened.

"We can confirm that the attacks have begun," wrote Daniel Cid, CTO and founder of the security company Sucuri. "DNS is one of the most critical parts of the Internet infrastructure, so having your DNS go down, it also means your email, HTTP and all other services will be unavailable."

There's no workaround for the flaw, so administrators need to patch to stop attacks. Major Linux distributions including Red Hat, CentOS and Ubuntu have issued patches, but it is still up to admins to apply it and restart their BIND servers.

A successful attack will leave a trace in server logs, Cid wrote. The command "ANY TKEY" should appear as long as admins have querylog enabled.

The patch and advisory from the Internet Systems Consortium is available here.

Send news tips and comments to jeremy_kirk@idg.com. Follow me on Twitter: @jeremy_kirk

Join the newsletter!

Or
Error: Please check your email address.
Rocket to Success - Your 10 Tips for Smarter ERP System Selection

Tags securityExploits / vulnerabilitiesSucuriUniversity of California at Berkeley

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Jeremy Kirk

IDG News Service
Show Comments

Essentials

Mobile

Victorinox Werks Professional Executive 17 Laptop Case

Learn more >

Exec

Budget

Back To Business Guide

Click for more ›

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Louise Coady

Brother MFC-L9570CDW Multifunction Printer

The printer was convenient, produced clear and vibrant images and was very easy to use

Edwina Hargreaves

WD My Cloud Home

I would recommend this device for families and small businesses who want one safe place to store all their important digital content and a way to easily share it with friends, family, business partners, or customers.

Walid Mikhael

Brother QL-820NWB Professional Label Printer

It’s easy to set up, it’s compact and quiet when printing and to top if off, the print quality is excellent. This is hands down the best printer I’ve used for printing labels.

Ben Ramsden

Sharp PN-40TC1 Huddle Board

Brainstorming, innovation, problem solving, and negotiation have all become much more productive and valuable if people can easily collaborate in real time with minimal friction.

Sarah Ieroianni

Brother QL-820NWB Professional Label Printer

The print quality also does not disappoint, it’s clear, bold, doesn’t smudge and the text is perfectly sized.

Ratchada Dunn

Sharp PN-40TC1 Huddle Board

The Huddle Board’s built in program; Sharp Touch Viewing software allows us to easily manipulate and edit our documents (jpegs and PDFs) all at the same time on the dashboard.

Featured Content

Product Launch Showcase

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?