Feeds

Severe bug deadlocks BIND

DNS lookup system peril

SANS - Survey on application security programs

Developers have published a fix to tackle a high-risk flaw in BIND, the widely used Domain Name Services (DNS) software. The flaw creates a potential mechanism for miscreants to crash systems running vulnerable version of the name-to-IP-address translation software.

Left unaddressed, the vulnerability can provide a means to cause BIND servers to deadlock and stop processing requests. Authoritative name servers can be pushed into a deadlock condition when processing incremental zone transfer (IXFR) updates. These updates deal with recent changes in DNS records, with unchanged records omitted to save bandwidth and processing power.

An advisory by the Internet Systems Consortium (ISC) explains: "When an authoritative server processes a successful IXFR transfer or a dynamic update, there is a small window of time during which the IXFR/update coupled with a query may cause a deadlock to occur.

"This deadlock will cause the server to stop processing all requests. A high query rate and/or a high update rate will increase the probability of this condition."

Attacks on the authoritative name servers that underpin the net's "yellow page" system have the potential to severely disrupt internet surfing, even though those users could still reach websites by using the IP address instead of name of the site they wanted to reach.

The flaw – discovered by net software firm Neustar – affects BIND version 9.7.1 and 9.7.2. Neither earlier versions of BIND nor BIND 9.8 are vulnerable.

No exploits against the vulnerability exist, but sysadmins are still being urged to update to BIND version 9.7.3, which addresses the flaw. ®

3 Big data security analytics techniques

More from The Register

next story
This time it's 'Personal': new Office 365 sub covers just two devices
Redmond also brings Office into Google's back yard
Oh no, Joe: WinPhone users already griping over 8.1 mega-update
Hang on. Which bit of Developer Preview don't you understand?
Microsoft lobs pre-release Windows Phone 8.1 at devs who dare
App makers can load it before anyone else, but if they do they're stuck with it
Half of Twitter's 'active users' are SILENT STALKERS
Nearly 50% have NEVER tweeted a word
Internet-of-stuff startup dumps NoSQL for ... SQL?
NoSQL taste great at first but lacks proper nutrients, says startup cloud whiz
IRS boss on XP migration: 'Classic fix the airplane while you're flying it attempt'
Plus: Condoleezza Rice at Dropbox 'maybe she can find ... weapons of mass destruction'
Ditch the sync, paddle in the Streem: Upstart offers syncless sharing
Upload, delete and carry on sharing afterwards?
New Facebook phone app allows you to stalk your mates
Nearby Friends feature goes live in a few weeks
Microsoft TIER SMEAR changes app prices whether devs ask or not
Some go up, some go down, Redmond goes silent
prev story

Whitepapers

Securing web applications made simple and scalable
In this whitepaper learn how automated security testing can provide a simple and scalable way to protect your web applications.
3 Big data security analytics techniques
Applying these Big Data security analytics techniques can help you make your business safer by detecting attacks early, before significant damage is done.
The benefits of software based PBX
Why you should break free from your proprietary PBX and how to leverage your existing server hardware.
Top three mobile application threats
Learn about three of the top mobile application security threats facing businesses today and recommendations on how to mitigate the risk.
Combat fraud and increase customer satisfaction
Based on their experience using HP ArcSight Enterprise Security Manager for IT security operations, Finansbank moved to HP ArcSight ESM for fraud management.