Siemens’ RuggedOS kit open to eavesdropping

Australian transport providers should check RuggedCom switches are not internet facing.

The US Department of Homeland Security (DHS) is warning that equipment from Siemens-owned industrial switch vendor RuggedCom is vulnerable to eavesdropping.

Cylance Inc security researcher Justin Clarke last week revealed an encryption vulnerability in RuggedCom network devices could allow an attacker to decipher encrypted traffic between connected devices. Clarke released proof-of-concept exploit code for the flaw.

RuggedCom switches have been deployed across a number of Australian transport corporations including the Australian Rail Track Corporation (ARTC), Queensland Rail, Public Transport Authority WA, Rio Tinto, Transgrid and Hydro Tasmania. All have deployed RuggedCom’s RS400 switch that contains the embedded Rugged Operating System (ROS), according to an ARTC document detailing an approval to use the switch as part of a signalling system.

The vulnerability stems from the fact a hardcoded RSA SSL private key in ROS can be identified.

“With the private key from a server being a known value it is not difficult to decrypt any traffic to/from the device,” Adrien de Beaupré of Canadian security firm Inc wrote on SANS Institute’s blog Wednesday.

The key management flaw also exposes those switches to other compromised devices on a shared network, explained Reid Wightman from control system security consultancy Digital Bond.

“[A]ny compromised host on the switch management network can be used to spoof affected RuggedCom switches, meaning that the bad guy or gal could capture legitimate usernames and passwords for the switch,” he wrote, adding it was typical of "cheap consumer-grade embedded products".

Once inside ROS, Clarke found that finding the key was an easy task, telling <i>Reuters</i>, “there is almost no authentication, there are almost no checks and balances to stop you."

DHS’s recommended mitigation measures include:

• Minimise network exposure for all control system devices. Control system devices should not directly face the Internet. • Locate control system networks and devices behind firewalls, and isolate them from the business network. • If remote access is required, employ secure methods, such as Virtual Private Networks (VPNs), recognising that VPN is only as secure as the connected devices.

Clarke was also responsible for finding a backdoor in [[xref: |RuggedCom’s|]] switches that used “factory” for the account name and relied on a password based on the device’s MAC address.

He detailed his year long struggle with RuggedCom to have the backdoor closed and the weak password fixed before deciding to publish it on seclists this April.

Follow @CSO_Australia and sign up to the CSO Australia newsletter.

Join the CSO newsletter!

Error: Please check your email address.
Show Comments

Featured Whitepapers

Editor's Recommendations

Solution Centres

Stories by Liam Tung

Latest Videos

  • 150x50

    CSO Webinar: Will your data protection strategy be enough when disaster strikes?

    Speakers: - Paul O’Connor, Engagement leader - Performance Audit Group, Victorian Auditor-General’s Office (VAGO) - Nigel Phair, Managing Director, Centre for Internet Safety - Joshua Stenhouse, Technical Evangelist, Zerto - Anthony Caruana, CSO MC & Moderator

    Play Video

  • 150x50

    CSO Webinar: The Human Factor - Your people are your biggest security weakness

    ​Speakers: David Lacey, Researcher and former CISO Royal Mail David Turner - Global Risk Management Expert Mark Guntrip - Group Manager, Email Protection, Proofpoint

    Play Video

  • 150x50

    CSO Webinar: Current ransomware defences are failing – but machine learning can drive a more proactive solution

    Speakers • Ty Miller, Director, Threat Intelligence • Mark Gregory, Leader, Network Engineering Research Group, RMIT • Jeff Lanza, Retired FBI Agent (USA) • Andy Solterbeck, VP Asia Pacific, Cylance • David Braue, CSO MC/Moderator What to expect: ​Hear from industry experts on the local and global ransomware threat landscape. Explore a new approach to dealing with ransomware using machine-learning techniques and by thinking about the problem in a fundamentally different way. Apply techniques for gathering insight into ransomware behaviour and find out what elements must go into a truly effective ransomware defence. Get a first-hand look at how ransomware actually works in practice, and how machine-learning techniques can pick up on its activities long before your employees do.

    Play Video

  • 150x50

    CSO Webinar: Get real about metadata to avoid a false sense of security

    Speakers: • Anthony Caruana – CSO MC and moderator • Ian Farquhar, Worldwide Virtual Security Team Lead, Gigamon • John Lindsay, Former CTO, iiNet • Skeeve Stevens, Futurist, Future Sumo • David Vaile - Vice chair of APF, Co-Convenor of the Cyberspace Law And Policy Community, UNSW Law Faculty This webinar covers: - A 101 on metadata - what it is and how to use it - Insight into a typical attack, what happens and what we would find when looking into the metadata - How to collect metadata, use this to detect attacks and get greater insight into how you can use this to protect your organisation - Learn how much raw data and metadata to retain and how long for - Get a reality check on how you're using your metadata and if this is enough to secure your organisation

    Play Video

  • 150x50

    CSO Webinar: How banking trojans work and how you can stop them

    CSO Webinar: How banking trojans work and how you can stop them Featuring: • John Baird, Director of Global Technology Production, Deutsche Bank • Samantha Macleod, GM Cyber Security, ME Bank • Sherrod DeGrippo, Director of Emerging Threats, Proofpoint (USA)

    Play Video

More videos

Blog Posts

Market Place