Feeds

Linux kernel cured of remote panic-attack bug

Get your BUG_ON

Build a business case: developing custom apps

Developers of the Linux kernel have patched a bug that allowed attackers to remotely crash a machine by sending it malicious Wi-Fi signals.

The flaw in the delBA handling of mac80211 has been fixed in version 2.6.32, the latest stable release of the Linux kernel. Various distributions of the open-source operating system have already acknowledged the issue and are expected to push out updates soon. Based on developer notes on the official Linux website, the vulnerability appears to have been introduced in February.

The flaw stemmed from faulty code that called the BUG_ON macro before various checks were performed. That raised the possibility of NULL being passed to TX/RX_STOP parameter, which in turn caused a kernel panic. The end result: an attacker within Wi-Fi range of a vulnerable machine might be able to effectively shut it down.

The bug was discovered by Johannes Berg, who found a separate flaw related to mac80211 that was fixed in the latest release. Details about both flaw are here and here. ®

The essential guide to IT transformation

More from The Register

next story
Rupert Murdoch says Google is worse than the NSA
Mr Burns vs. The Chocolate Factory, round three!
e-Borders fiasco: Brits stung for £224m after US IT giant sues UK govt
Defeat to Raytheon branded 'catastrophic result'
Know what Ferguson city needs right now? It's not Anonymous doxing random people
U-turn on vow to identify killer cop after fingering wrong bloke
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
prev story

Whitepapers

Endpoint data privacy in the cloud is easier than you think
Innovations in encryption and storage resolve issues of data privacy and key requirements for companies to look for in a solution.
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.
Top 8 considerations to enable and simplify mobility
In this whitepaper learn how to successfully add mobile capabilities simply and cost effectively.
Solving today's distributed Big Data backup challenges
Enable IT efficiency and allow a firm to access and reuse corporate information for competitive advantage, ultimately changing business outcomes.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.