Feeds

New tool jailbreaks Microsoft Surface slabs in 20 SECONDS

Bam! Run any desktop app. Pow! Samsung kills Win 8 tab

3 Big data security analytics techniques

Microsoft was quick to brush off the debugging hack that allows locked-down Windows RT Surface slabs to run any unauthorised desktop software. But now the exploit has been packaged into a slick jailbreaking tool that can unlock a Redmond fondleslab in seconds.

A programmer going by the name of Netham45 has released RT Jailbreak Tool v1, a batch file that automates the Windows RT trick first revealed by security researcher C. L. Rokr.

Netham45 reckons you can jailbreak a slab in about 20 seconds just by running the runExploit.bat file on the tablet and pressing a button, although it may ask a few "self-explanatory" questions afterwards.

The hack lets users install and run any desktop software of their choosing on Microsoft's Surface tablet-laptops and any other Windows RT devices. The Redmond giant wanted punters to only use cryptographically signed apps obtained from the official Windows Store, rather than any old program compiled for RT, the ARM port of Windows 8. The jailbreak hack simply disables this security signature check.

Netham45 has published a list of desktop apps recompiled to run on hacked Windows RT devices, here and here.

Rokr's hack required the Windows Debugger with Administrator-level permissions, remotely connected to the tablet to manipulate the device's kernel memory. Specifically, the exploit injects a piece of ARM code that switches off the signature checks and briefly diverts the Windows RT kernel to run these instructions.

The RT Jailbreak tool will not permanently alter the machine, but since it is only changing a kernel variable in RAM, it must be run after rebooting or powering up the tablet if one wishes to continue using any unauthorised software.

It may also void the fondleslab's warranty and, while active, obviously allows any ARM-compatible software to run including malware if it even exists.

Microsoft earlier this week brushed off the Rokr exploit but suggested the vulnerability might be closed in a future release of Windows RT.

In fact, the Redmond giant doesn't even consider it to be a security vulnerability. The company stated: “We applaud the ingenuity of the folks who worked this out and the hard work they did to document it. We’ll not guarantee these approaches will be there in future releases.” ®

Bootnote

Samsung has iced plans for a US launch of its Qualcomm processor-powered Windows RT tablet, blaming confusion among potential customers. Company vice-president Mike Abary told Cnet at CES in Las Vegas this week that there hadn't been a "very clear positioning of what Windows RT meant in the marketplace and what it stood for relative to Windows 8". Samsung bosses think there needs to be some "heavy lifting" and "heavy investment" to educate consumers - an expensive effort that the electronics giant is unwilling to commit to.

Samsung had announced its Windows RT ATIV Tab at the IFA trade show in Berlin in August 2012. The ATIV was Samsung's Windows 8 PC, tablet and Windows Phone 8 range, and was the backwards spelling of vita, meaning "life" in Latin.

At the time, Microsoft vice-president Nick Parker, who oversees Redmond's relationship with computer manufacturers, called Samsung "a highly valued partner" and said "it’s great to see this investment in a global brand for its Windows-based Smart PCs, tablets, and phones". Er.

3 Big data security analytics techniques

More from The Register

next story
Obama allows NSA to exploit 0-days: report
If the spooks say they need it, they get it
Samsung Galaxy S5 fingerprint scanner hacked in just 4 DAYS
Sammy's newbie cooked slower than iPhone, also costs more to build
Putin tells Snowden: Russia conducts no US-style mass surveillance
Gov't is too broke for that, Russian prez says
Snowden-inspired crypto-email service Lavaboom launches
German service pays tribute to Lavabit
Mounties always get their man: Heartbleed 'hacker', 19, CUFFED
Canadian teen accused of raiding tax computers using OpenSSL bug
One year on: diplomatic fail as Chinese APT gangs get back to work
Mandiant says past 12 months shows Beijing won't call off its hackers
Call of Duty 'fragged using OpenSSL's Heartbleed exploit'
So it begins ... or maybe not, says one analyst
Heartbleed exploit, inoculation, both released
File under 'this is going to hurt you more than it hurts me'
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.