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.
- Information Security Risk Consultant, HMG, Public sector
A Public Sector Information Security Risk Consultant is needed for a long term project in the Yorkshire area. This is a Security consultancy role so travel to other client site locations across the country will be expected. The Public Sector Information Security Risk Consultant MUST have current security clearance and ideally have a breath of information and technology security experience. Broad knowledge across IT transformation, Cloud is also key. Public Sector Information Security Risk Consultant should be versed in working within the public sector HMG environments and be experienced in conducting security risk assessments on sizable IT systems. Broad experience across GRC, ISO27001, NIST is key. Career progression, personal development and excellent training provided. All details kept in the strictest of confidence Salary: £55,000 Location: Yorkshire Ref: GM7720 (Cyber Security Jobs, Information Security Jobs, IT Security Jobs, Cyber Security Jobs in Yorkshire)
- Greenfield opportunity SOC / Threat Hunting Services Lead
- £85,000+ Base
Exclusive Greenfield opportunity to DCL Search & Selection. We are looking for an experienced SOC / Threat Hunting Services Lead to build a NEW Security Operation Centre (SOC) / Threat hunting service within an existing security consultancy. This is a brand new service offering for the client. The successful SOC / Threat Hunting Services Lead must, therefore, have previous experience in building a SOC / Threat hunting (IR) service from the beginning. Everything including, but not limited to; selection of the systems, platforms, kitting out the physical office space. Customisation, setting the policies, playbooks, go to market collateral, recruitment (through DCL obviously) establish processes, management of the team, service delivery, refinement, development etc. Essentially the end to end creation of the capability and then the day to day management and expansion of the service. An in-depth technical background is essential, experience across SOC SIEM/ Threat Hunting (IR) tools, processes, techniques, operational etc The goal is to create, spin up and deliver a SOC/threat hunting (IR) offering to clients ASAP in 2020. Investment and board sign off approved. Apply today for more information or contact me directly on Chris.Holt@dclsearch.com or 07884666351. Candidates must be UK based and commutable to Bracknell. Sponsorship can not be provided to Non-EU Candidates. Ref CH7713 £85,000+ Base
- IT Managed Services Account Director
- Up to £80,000 + Double OTE
IT Managed Services Account Director We are currently working with a growing multi managed service provider who specialises in Cloud & Connectivity services who are currently looking for an IT Managed Services Account Director in London. The IT Managed Services Account Director will be responsible for selling (Increase revenue, develop pipeline etc.) into our client’s current enterprise customers selling public cloud solutions. The IT Managed Services Account Director should have Current experience selling public cloud solutions (preferably Microsoft Azure) into enterprise customers. Currently working for an IT managed services business Commutable to London, Home working is available (Non-EU candidates are not able to be sponsored). Consistent tenure in current and previous positions. Ref BD7703 Salary: Up to £80,000 + Double OTE (Cloud Jobs, Cloud Computing Jobs, Cloud Sales Jobs, Azure Jobs)
- Service Delivery Lead (Data Centre)
- Up to £60,000 Base
A State of the Art Data Centre business are looking for a Service Delivery Lead-in Wiltshire. The Service Delivery Lead will be responsible for maintaining and improving current services to our client's customers. The Service Delivery Lead will also be responsible for a service desk team (reviews, hiring, training etc.) Other responsibilities include: Acting as a senior point of escalation for any customer incidents making sure these are raised quickly and efficiently Root cause analysis Maintain and improve ITIL disciplines Experience required ITIL v3 Certified Current experience within a Data Centre / Data Center Environment Current experience within a Senior Service Desk role. Candidates must be UK based. Sponsorship is not available for Non-EU candidates. Ref BD7701 Up to £60,000 Base (Data Centre Jobs, Data Center Jobs, Service Delivery Jobs)