Feeds

BIND crash bug prompts urgent update call

Master server flaw could break the interwebs

The essential guide to IT transformation

A vulnerability in BIND creates a means for miscreants to crash vulnerable Domain Name System servers, posing a threat to overall internet stability as a result.

Exploits targeted at BIND (Berkeley Internet Name Domain Server) version 9 are already in circulation, warns the Internet Software Consortium, the group which develops the software. ISC urges sys admins to upgrade immediately, to defend against the "high risk" bug.

Sys admins are urged to upgrade BIND servers to versions 9.4.3-P3, 9.5.1-P3 or 9.6.1-P1 of the software, which defend against the flaw.

The vulnerability involves BIND servers that act as a master (slave systems are unaffected) and involves problems in dealing with malformed update messages, which can used to cause a server to crash, as explained in a security alert by ISC here.

Receipt of a specially-crafted dynamic update message to a zone for which the server is the master may cause BIND 9 servers to exit. Testing indicates that the attack packet has to be formulated against a zone for which that machine is a master. Launching the attack against slave zones does not trigger the assert.

BIND is used on a great majority of DNS servers on the Internet. DNS maps between easy-to-remember domain names, understood by humans, and their corresponding numerical IP addresses, needed by computers. Simply put, the system can be compared to a phone book for the internet.

Screwing with this system creates a means to possibly derail surfing and email delivery, among many other undesirable effects. ®

Next gen security for virtualised datacentres

More from The Register

next story
e-Borders fiasco: Brits stung for £224m after US IT giant sues UK govt
Defeat to Raytheon branded 'catastrophic result'
Germany 'accidentally' snooped on John Kerry and Hillary Clinton
Dragnet surveillance picks up EVERYTHING, USA, m'kay?
Snowden on NSA's MonsterMind TERROR: It may trigger cyberwar
Plus: Syria's internet going down? That was a US cock-up
Who needs hackers? 'Password1' opens a third of all biz doors
GPU-powered pen test yields more bad news about defences and passwords
Think crypto hides you from spooks on Facebook? THINK AGAIN
Traffic fingerprints reveal all, say boffins
Rupert Murdoch says Google is worse than the NSA
Mr Burns vs. The Chocolate Factory, round three!
Microsoft cries UNINSTALL in the wake of Blue Screens of Death™
Cache crash causes contained choloric calamity
prev story

Whitepapers

5 things you didn’t know about cloud backup
IT departments are embracing cloud backup, but there’s a lot you need to know before choosing a service provider. Learn all the critical things you need to know.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Build a business case: developing custom apps
Learn how to maximize the value of custom applications by accelerating and simplifying their development.
Rethinking backup and recovery in the modern data center
Combining intelligence, operational analytics, and automation to enable efficient, data-driven IT organizations using the HP ABR approach.
Next gen security for virtualised datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.