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.
- IT Cyber Security Recruitment Consultant – Hot Desk
- Dependent on Experience
IT Cyber Security Recruitment Consultant – Hot Desk | Beckenham, London, UK | Training Provided | Rapid Career Development for achievers | No Threshold Commission Scheme | Luxury Target Based Rewards & Incentives | Previous Cyber Security Sales/Recruitment Experience Required. DCL Search & Selection are a client focussed niche recruitment company with over 26 years of experience within the IT Industry. We are looking for an IT Cyber Security Recruitment Consultant due exponential growth and investment in the industry. Why DCL? No Threshold & Commission Scheme up to 30%. Endless training & support CRM Database with an exceptional amount of both Clients and Candidates Minimal Admin work Rapid promotion for achievers 3 Computer Screens & work mobile. LinkedIn Recruiter License Join a creative team of IT Recruitment Consultants dedicated to connecting talent The IT Cyber Security Recruitment Consultant will be responsible for: Identifying, qualifying and approaching passive cyber security candidates through numerous methods and guiding them through the recruitment process. Winning new business/ developing existing relationships Achieving and exceeding sales targets Self-managing daily tasks to make sure that you will be as successful as possible Having a structured approach with a solution selling ability as the sales cycles are not as quick. What we are looking for: Previous & Successful B2B / Business to Business Sales/Recruitment experience within the Cyber Security Industry. Excellent telephone manner Professional, fast-paced, driven and ambitious Mature and honest and a passion to succeed Commutable to Beckenham Want to know more? Click Apply or email your CV to email@example.com or call 02086634030. (Cyber Recruitment Jobs, IT Recruitment, IT Recruitment Consultant, Executive Search Consultant, IT Executive Search Consultant, IT Headhunter, Recruitment Headhunter)
- P3M3 Project Manager Cyber
Ref CH7790 P3M3 Project Manager Cyber London Experienced Project Manager with a Cyber Security focus is needed to join a London business. In you are a certified P3M3 project / program manager with Cyber experience I want to speak with you. Specific experience across Axelos best practice P3M3 (version 3) is essential. Specifically across the P3M3 maturity models; Portfolio Management (PfM3) , Programme Management (PgM3), and Project Management (PjM3) I am looking for a project / programme manager that has experience taking clients from and through the maturity Level 1 to Level 5. Specifically helping them to identify their challenge / requirements in existing / upcoming projects and effectively deliver change. Through the seven perspectives of; Organisational governance, Management control, Benefits management, Risk management, Stakeholder management, Finance management and Resource management. All details kept in the strictest of confidence. Apply today for more information. Chris.Holt@dclsearch.com 07884666351
- Government / Public sector Cyber Security Consultant
- Up to £60,000
CH7789 Government / Public sector Cyber Security Consultant £60,000 London Government / Public sector Cyber Security Consultant is needed to join a Consultancy in Great London. Security clearance is a must. This management consultancy delivers advisory, project definition / rescoping, business transformation, Cyber security programs and have a requirement for 3 new hires. The Government / Public sector Cyber Security Consultant MUST have current experience working within the Government / Public Sector. A blend of broad technical solutions, consultative advisory skills is essential. Your role will include, but not be limited to; across engaging with senior stakeholders, requirement identification, business analysis, technical consulting, business transformation, secure technical design, workshops / Cyber table top exercises etc CCP (CLAS) SC / DV clearance. Must be happy to travel within the UK. All details kept in confidence. Apply today to find out more. Chris.Holt@dclsearch.com 07884666351
- Cyber IR Threat hunter, Managed Detection & Response, Remote UK
- United Kingdom
- £55,000 + benefits
REF CH7787 Cyber IR Threat hunter, Managed Detection & Response, Remote UK £55,000 + benefits Cyber IR Threat hunter with Managed Detection & Response experience needed. Can be remotely based or in London (if you are commutable) This is an opportunity to be deeply involved in heart of a technical cyber investigation, often working on technically complex situations with international clients. The Cyber IR Threat hunter with Managed Detection & Response consultant will work remotely connecting into live client environment to gain technical visibility on the incident, monitor engagements and help formulate a plan to eradicate remediate the situation. Hands on experience in the following is essential; Network behaviour analysis, Cyber security incident response / malware analysis, Managed Endpoint detection and response solutions i.e. Carbon Black, Countercept, Threat detect. Digital forensics, threat detection, hunting / analysis. Scripting Interest to hear from individuals with experience innovating and developing capabilities. All details kept in the strictest of confidence.