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.
Attack One
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.
Source: threatpost
Latest Jobs
-
- VOIP / SIP App Developer. Contract. SIP | VOIP experience needed. SC Cleared Outside IR35 Contract. London
- London
- OUTSIDE IR35
-
SIP | VOIP Developer. SC Cleared Contract. London Looking for a SC Cleared SIP / VOIP Developer to develop an application that interacts with a set of voice and video signalling API’s You will also work on developing in-house applications, browser plugins and automated tooling to support secure communication systems. Responsibilities Develop an application that will manage number mapping and associated identities using commercial SBC API’s. Develop new user-facing features using React.js or other modern JavaScript frameworks. Build reusable components and front-end libraries for future use. Collaborate with the design team to translate UI/UX design wireframes into code. Work closely with backend developers to integrate front-end code with server-side logic. Conduct code reviews and provide constructive feedback to team members. Stay up-to-date on emerging technologies and industry trends to continuously improve our front-end development practices. Troubleshoot and debug issues that arise during development and in production environments. Maintain high coding standards and practices and ensure code is well-documented. Requirement Experience of developing specialist applications using REST API’s. Good knowledge of Go, Java and Python (open to alternative combinations of languages). Proficiency in front-end languages and frameworks such as HTML, CSS, JavaScript, React.js, etc. Strong understanding of web standards, responsive design, and cross-browser compatibility. Experience with version control systems such as Git. Knowledge of RESTful APIs and asynchronous request handling. Familiarity with UI/UX design principles and tools.
-
- Senior Data Privacy Consultant. Client Facing | London
- London
- N/A
-
Senior Data Privacy Consultant. Client Facing | London Senior Data Privacy Consultant needed for a key client facing opportunity. Must be willing to undergo SC Security Clearance. Hybrid role- onsite with customer / office 2-3 days a week. London Key Responsibilities: Lead and support client facing data privacy projects. Assess compliance, define and deliver strategic projects / implement privacy solutions. Manage project teams and develop business opportunities. Required Experience: Experience in data protection and privacy standards. Background in consulting. Skills and Qualifications: Business consulting experience IAPP Privacy Manager / Privacy Technologist Location Greater London UK based role. Not able to provide VISA sponsorship.
-
- Security Analyst - Internal role. London commutable. Permanent
- London
- N/A
-
Security Analyst - Internal role. London commutable opportunity. Operational Security - Investigate, escalate and proactively work to ensure household name remains protected. Project Security - Coordinate, log change requests with project delivery teams to meet security requirements Policy / compliance - work with team to aid in uplifting these as and where needed This role is role to investigate, escalate and proactively work to protect a globally recognised brand. You must have current hands on operational analytical security experience with Microsoft technology stack Someone with a SOC Analyst / security engineering background would be well suited. This position will join a small team and would suit someone that has broad experience across the security threat landscape. Experience / knowledge across industry GRC standards such NIST, ISO27001 etc very advantageous and a priority. You will work across multiple teams proactively working to secure the business. Must be able to commute to Central London 3 days a week. Visa sponsorship not available Apply today to find out more.
-
- Network / Security Infrastructure Engineer | West London | Permanent
- London
- N/A
-
Network / Security Infrastructure Engineer | West London | Current Config, Install, upgrade experience On prem / Datacetner experience essential. Hands on experience MUST include: Routing, Switching, Network Security (firewall, IDS etc), Microsoft exchange / Exchange 365. Scripting / automation experience wanted. Python, Powershell etc Regular travel to West London is required. Visa sponsorship not available. Apply today for more information chris.holt@dclsearch.com Use this whatapp link to reach out https://wa.me/message/6USF5RAQBOZIP1