Feeds

SMS phone crash exploit a risk for older Nokias

Broken message, frozen phone

  • alert
  • submit to reddit

The Essential Guide to IT Transformation

Nokia has upgraded its phone software to guard against a security glitch that might allow a cracker to render a phone inoperable by sending a text message. However, older phones may still be vulnerable.

Job de Haas, a researcher at security firm ITSX, gave a presentation during a recent Black Hat conference, where he demonstrated how a malformed message crashes a Nokia 6210 phone on its receipt. He did this by adapting a program called sms_client, which sends an SMS message from an Internet-connected PC, in which the User Data Header is broken.

Once the message is received it is impossible to turn on an infected phone again without somehow deleting the offending message.

The vulnerability is tied to the software used by a phone. The flaw affects Nokia 6210, 3310 and 3330 phones, de Haas has discovered, but not a Siemens phone he tried.

Nokia spokesman Pekka Isosomppi told us that the phone manufacturer implemented a fix for the problem after de Haas contacted them about it in August.

He declined to be specific about the nature of the bug but said Nokia has "made the correction and implemented it in our phone programmes, meaning that phones rolling out of the factory have a fix in them."

de Haas said that although phones produced since this summer are immune, older phones might still be vulnerable to the exploit. He has determined the bug to be fixed in release 5.27 for the 6210. Upgrading phone software to guard against the flaw can't be done by users themselves, and would require a trip to a Nokia service centre.

Nokia told us that its users will not have come across the exploit and said the "snag is theoretical" but de Haas disagrees with this low impact assessment.

de Haas said: "Once you figure it out it is quite trivial and there are plenty of people with the knowledge to pull it off. Further we have already determined that there are more problems in the phones even as recent as v5.27."

A network development engineer at a European mobile operator, who asked to remain anonymous, has been in touch to tell us that it first encountered this security issue around 18 months ago. He found the vulnerability to be very much dependent on the version of software used on a Nokia phone, and remembers seeing the security flaw (which he blames on sloppy coding) on the handsets of other manufacturers. ®

Related Stories

How to crash a phone by SMS
Nokia 3330
Nokia 7650: smart phone, shame about the price
Microsoft and Vodafone launch mobile Outlook app
SMS pumps up Vodafone sales
GSM Association launches new standard for next-gen mobiles

External Links

ITSX in SMS security

Build a business case: developing custom apps

More from The Register

next story
14 antivirus apps found to have security problems
Vendors just don't care, says researcher, after finding basic boo-boos in security software
'Things' on the Internet-of-things have 25 vulnerabilities apiece
Leaking sprinklers, overheated thermostats and picked locks all online
iWallet: No BONKING PLEASE, we're Apple
BLE-ding iPhones, not NFC bonkers, will drive trend - marketeers
Only '3% of web servers in top corps' fully fixed after Heartbleed snafu
Just slapping a patched OpenSSL on a machine ain't going to cut it, we're told
How long is too long to wait for a security fix?
Synology finally patches OpenSSL bugs in Trevor's NAS
Secure microkernel that uses maths to be 'bug free' goes open source
Hacker-repelling, drone-protecting code will soon be yours to tweak as you see fit
Israel's Iron Dome missile tech stolen by Chinese hackers
Corporate raiders Comment Crew fingered for attacks
Roll out the welcome mat to hackers and crackers
Security chap pens guide to bug bounty programs that won't fail like Yahoo!'s
HIDDEN packet sniffer spy tech in MILLIONS of iPhones, iPads – expert
Don't panic though – Apple's backdoor is not wide open to all, guru tells us
prev story

Whitepapers

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.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
Backing up Big Data
Solving backup challenges and “protect everything from everywhere,” as we move into the era of big data management and the adoption of BYOD.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.
Why and how to choose the right cloud vendor
The benefits of cloud-based storage in your processes. Eliminate onsite, disk-based backup and archiving in favor of cloud-based data protection.