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Context helps to improve IoT security

Research leads to identification and improvements in IoT security

4 July 2014: Researchers at Context Information Security have been able to expose a security weakness in a wifi enabled, energy efficient LED light bulb that can be controlled from a smartphone.

By gaining access to the master bulb, Context was able to control all connected light bulbs and expose user network configurations. The bulb manufacturer LIFX has since worked closely with Context to promptly patch the issue, which is now available as a firmware update. A spokesperson, Simon Walker from LIFX says that, "Prior to the patch, no one other than Context had exposed this vulnerability, most likely due to the complexity of the equipment and reverse engineering required."

Details of the vulnerability and the subsequent fix, have been published today at: contextis.co.uk/blog/hacking-internet-connected-light-bulbs

The work by Context is part of ongoing research into the security of the emerging Internet of Things (IoT) and raises some questions. "It is clear that in the dash to get onto the IoT bandwagon, security is not being prioritised as highly as it should be in many connected devices," said Michael Jordon, Research Director at Context. "We have also found vulnerabilities in other internet connected devices from home storage systems and printers to baby monitors and children's toys. IoT security needs to be taken seriously, particularly before businesses start to connect mission critical devices and systems."

The LIFX bulb was launched in September 2012 with crowd funding through the Kickstarter website. The architecture, based on the 802.15.4 6LoWPAN wireless mesh network, requires only one bulb to be connected to the wifi at a time. Context researchers found that they were able to monitor packets on the mesh network and identify the specific packets which shared the encrypted network configuration among the bulbs.

The fix, developed with the help of Context, is included in the new firmware available at updates.lifx.co and now encrypts all 6LoWPAN traffic, using an encryption key derived from the wifi credentials. It also includes functionality for secure 'on-boarding' of new bulbs on to the network.

The detailed steps of gaining access to the device involved accessing the firmware by physically interrogating the device's embedded microcontrollers to identify and understand the encryption mechanism in use. Armed with knowledge of the encryption algorithm, key, initialisation vector and an understanding of the mesh network protocol, Context was able to inject packets into the mesh network, capture and decrypt the network configurations, all without any prior authentication or alerting of its presence.

"Hacking into the light bulb was certainly not trivial but would be within the capabilities of experienced cyber criminals," said Michael Jordon. "In some cases, these vulnerabilities can be overcome relatively quickly and easily as demonstrated by working with the LIFX developers. In other cases the vulnerabilities are fundamental to the design of the products. What is important is that these measures are built into all IoT devices from the start and if vulnerabilities are discovered, which seems to be the case with many IoT companies, they are fixed promptly before users are affected."

For more details, visit: contextis.co.uk/blog/hacking-internet-connected-light-bulbs

About Context
Launched in 1998, Context has a client base that includes some of the world's most high profile blue chip companies, alongside government organisations. An exceptional level of technical expertise underpins all Context services, while a detailed and comprehensive approach helps clients to attain a deeper understanding of security vulnerabilities, threats or incidents. Many of the world's most successful organisations turn to Context for technical assurance, incident response and investigation services. Context is also at the forefront of research and development in security technology. As well as publishing white papers and blogs addressing current and emerging security threats and trends, Context consultants frequently present at open and closed industry events around the world. Context delivers a comprehensive portfolio of advanced technical services and with offices in the UK, Germany and Australia, is ideally placed to work with clients worldwide.


For more information for editors, please contact:
Peter Rennison / Allie Andrews
PRPR, Tel + 44 (0)1442 245030 / + 44 (0)7831 208109
[email protected] / [email protected]

Source: RealWire

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