Bugs in Samsung IoT Hub Leave Smart Home Open To Attack
Researchers found 20 flaws in Samsung’s SmartThings Hub controller – opening up supported third-party smart home devices to attack.
Researchers found 20 vulnerabilities in Samsung’s SmartThings Hub, allowing attackers to control smart locks, remotely monitor the home via connected cameras and perform other alarming functions.
Cisco Talos researchers, who published a technical breakdown of the vulnerabilities on Thursday, said each of the flaws are located in Samsung’s centralized controller, a component that connects to an array of IoT devices around the house – from light bulbs, thermostats, and cameras. SmartThings Hub is one of several DIY home networking devices designed to allow homeowners to remotely manage and monitor digital devices.
“Given that these devices often gather sensitive information, the discovered vulnerabilities could be leveraged to give an attacker the ability to obtain access to this information, monitor and control devices within the home, or otherwise perform unauthorized activities,” researchers said in a report.
SmartThings Hub uses a Linux-based firmware and allows for communications with various IoT devices using various wireless standards Zigbee, Z-Wave and Bluetooth. SmartThings supports a broad spectrum of third-party products- from Philips Hue smart lightbulbs, to Ring video doorbells, as well dozens more smart home products sold under the brands GE, Bose and Lutron.
The breadth of potentially impacted products means an attacker could hack an array of connected home devices allowing adversaries to disable smart locks, turn off motion detectors, shut down smart plugs, control thermostats or even cause physical damage to appliances.
A Samsung spokesperson told Threatpost patches have been deployed that fix the bugs. “We are aware of the security vulnerabilities for SmartThings Hub V2 and released a patch for automatic update to address the issue. All active SmartThings Hub V2 devices in the market are updated to date,” Samsung said.
Separate to Cisco Talos, Samsung released a firmware advisory for Hub V2 devices on July 9.
Several vendors whose third-party products are supported by SmartThings including Philips Hue, Bose, Lutron and Ring didn’t respond to requests for comment from Threatpost.
Multiple Attack Chain Scenarios
Successful exploitation of vulnerabilities is not trivial. All require an attacker to chain a number of existing vulnerabilities together, according to the report.
“When considering the severity of vulnerabilities, it is essential to keep in mind that they might be used as part of a chain, as this would significantly elevate their severity,” researchers said.
There are three different attack chains that could be exploited by hackers to penetrate home devices, researchers said. The first is a remote code execution (RCE) vulnerability – the most dangerous of the three because it can be exploited without prior authentication and can be performed remotely.
This RCE chain attack impacts the “video core” HTTP server of the hub, and allows attackers to inject HTTP requests into this process from a network. The vulnerability (CVE-2018-3911) exists within the communications (via Port 39500) present between the hub and the remote servers it communicates with. The vulnerability is essentially an exploitable HTTP header injection bug that enables attackers to send specially crafted HTTP requests to impacted devices.
Researcher note, these injected requests are only semi-controlled – so to take full advantage of the attack, a bad actor would also need to exploit bugs (vulnerabilities CVE-2018-3907 to CVE-2018-3909) within the REST request parser of the “video core” process, which modifies the path of an HTTP request.
Finally, an attacker could close out the attack chain by leveraging a bug (CVE-2018-3902) that exists in the camera “replace” feature of video-core’s HTTP server. They would send an HTTP request leading to a buffer overflow attack on the stack.
Attacks Two, Three
The other two attack chains require the attacker to gain prior authentication, researchers said. One of these attacks enables remote code execution via a vulnerability (CVE-2018-3879) enabling authorized attackers to execute SQL queries against a database inside the device.
When used alone, this flaw only allows attackers to alter the database – but an array of other memory corruption vulnerabilities (CVE-2018-3880, CVE-2018-3906, CVE-2018-3912 to CVE-2018-3917, and CVE-2018-3919) that exist in SmartThings Hub allow for executing arbitrary code in the network after exploiting the first bug, researchers said.
The vulnerability CVE-2018-3879 can also be leveraged in the final chain attack, which allows for remote information leakage. This vulnerability can be used to create an empty file anywhere inside the device.
Attackers can then leverage denial of service bug CVE-2018-3926, which exists within the ZigBee firmware update process present within the “hubCore” binary used by the SmartThings Hub. Once the empty file is created this bug will cause the “hubcore” process to crash, triggering an information leak bug (CVE-2018-3927) that can be captured from the network.
“By chaining these 3 vulnerabilities in order, an attacker can obtain a memory dump of the `hubCore` process, which contains most of the core logic, and consequent sensitive information, of the Hub,” researchers said.
While Samsung’s updates have been pushed out automatically, researchers recommended that users verify the updated version has actually been applied to devices to ensure that they are no longer vulnerable.
“While devices such as the SmartThings Hub are typically deployed to provide additional convenience and automation to users, special consideration must be made to ensure that they are configured securely, and updated when new firmware updates are made available by the manufacturer,” they said.
- Cloud Channel Manager
- Up to £75,000 Base dependant on experience + Double OTE
A Cloud Channel Manager is needed for a Leading Cloud Service Provider in London due to increased customer demand. The Cloud Channel Manager will be primarily responsible for rebuilding & protecting current accounts and also new logo sales into the channel e.g. Value Added Resellers (VAR) / Managed Service Providers (MSP), SI etc. Requirements Current experience selling Cloud technology such as AWS / Azure into the channel Over achieved on sales targets. Long tenure (3/4 years+) in current and previous positions. Reference Number: PG7419
- Business Development Manager (Public Sector)
- Up to £75,000 Basic + Double OTE (Commission is uncapped and subject to accelerators)
One of our clients who are a leading service provider in London are looking for a Public Sector focussed Business Development Manager. The Business Development Manager (Public Sector) will be selling from a portfolio of managed ICT services and cloud services to prospects within the public sector focusing on central government, healthcare, university’s The portfolio will cover flexible end to-end managed services, UC, cloud, hosting and SDWan. Preference will also be given to Business Development Manager (Public Sector) who satisfy the following criteria: Over achievement of new business sales targets 5 years of experience in selling at least two of these; managed services, UC, Azure, AWS, SDWAN etc. New Business Background is a must in central government, healthcare or universities In return you will be working for a company that is growing over 25% organically year on year with excellent sales support and a great senior leadership team. Reference Number: BD7410
- Google Cloud Architect
- Up to £90.000 base plus bonus
We have a very urgent requirement for Google Cloud Architect for one of the reputed clients who are a fast growing GCP partner. The Google Cloud Architect will leverage Google Cloud technologies, designs, develops, and manages robust, secure, scalable, highly available, and dynamic solutions to drive business objectives. This will require all dimensions of cloud architecture including: Building, migrating and testing GCP environments and integration with other providers Build, design and implement scalable cloud-based web applications for PaaS, IaaS or SaaS. Provide thought leadership for cloud developer technology and collaborate with cross-functional engineering teams to streamline or improve adoption of Google Cloud Platform. This position will be located in London, United Kingdom. Unfortunately our client are unable to sponsor for this opportunity Reference Number: ES7411
- Solutions Consultant (Telecoms, SDWAN, IOT, WAN, Hosted services)
- Up to €90,000 plus car, bonus and benefits
Solutions Consultant is required to help lead a number of key client Migrations projects for this tier 1 Telecom company, the main role for the Solutions Consultant is helping customers migrate to new services, with a focusing on hosting (AWS, Azure) SDWAN and IOT You will be responsible for Post sales design documentation, implementation and migration of complex solutions for managed enterprise customers. Complex solutions consist of multi-product services. The TDA’s role is to ensure that these services interoperate and integrate into the customer environment. Such products consist of but not limited to MPLS, Ethernet, IPSec VPN’s, VoIP, Video Conferencing, Wireless, Internet, Private DSL, WAN Optimization, Managed Security Services, Managed Hosting, SDWAN and Complex Migration Planning. The TDA will own the technical delivery of customer solutions and will be the technical interface between the customer, product teams and project management during service delivery. Close engagement with pre-sales, technically validating solutions proposed are deliverable and all technical aspects are clearly defined prior to contract signature. The TDA accepts technical ownership of the solution at the point of contract signature. Lead customer facing technical workshops requiring excellent communication with the ability to articulate technical concepts clearly to all levels of competency. Providing support to 3rd line teams for OEM and design related faults. You will need to be at CCIE level (ideally CCIE R&S or SP ) with strong low level design and deployment skills, comfortable in front of customers and leading customer meeting Knowledge in SDWAN and Hosted services would be advantageous Reference Number: RA7413