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

Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.

Tags Exploits / 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

Cool Tech

Bang and Olufsen Beosound Stage - Dolby Atmos Soundbar

Learn more >

Toys for Boys

ASUS ROG, ACRONYM partner for Special Edition Zephyrus G14

Learn more >

Nakamichi Delta 100 3-Way Hi Fi Speaker System

Learn more >

Sony WF-1000XM3 Wireless Noise Cancelling Headphones

Learn more >

Family Friendly

Mario Kart Live: Home Circuit for Nintendo Switch

Learn more >

Philips Sonicare Diamond Clean 9000 Toothbrush

Learn more >

Stocking Stuffer

SunnyBunny Snowflakes 20 LED Solar Powered Fairy String

Learn more >

Teac 7 inch Swivel Screen Portable DVD Player

Learn more >

Christmas Gift Guide

Click for more ›

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Tom Pope

Dynabook Portégé X30L-G

Ultimately this laptop has achieved everything I would hope for in a laptop for work, while fitting that into a form factor and weight that is remarkable.

Tom Sellers

MSI P65

This smart laptop was enjoyable to use and great to work on – creating content was super simple.

Lolita Wang

MSI GT76

It really doesn’t get more “gaming laptop” than this.

Jack Jeffries

MSI GS75

As the Maserati or BMW of laptops, it would fit perfectly in the hands of a professional needing firepower under the hood, sophistication and class on the surface, and gaming prowess (sports mode if you will) in between.

Taylor Carr

MSI PS63

The MSI PS63 is an amazing laptop and I would definitely consider buying one in the future.

Christopher Low

Brother RJ-4230B

This small mobile printer is exactly what I need for invoicing and other jobs such as sending fellow tradesman details or step-by-step instructions that I can easily print off from my phone or the Web.

Featured Content

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?