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.
- IAM Consultant
- Upto €85000 plus benefits
An Identity & Access Management Consultant is needed for an expanding IT Security consultancy, based in France. (Remote role with monthly office meet-ups) The Identity & Access Management Consultant will be responsible for the technical design and implementation of Identity & Access Management/IAM products for a wide variety of clients. Deliver bespoke end-to-end consultancy service to our clients, from gathering requirements through to implementation. Work in a close team designing, developing, and implementing first-class IAM solutions. Manage client relationships, working closely with key stakeholders to continually evaluate business requirements and ensure the highest quality solution delivery. If you are interested we are looking for an individual with Previous experience working within the IAM or CIAM field is essential, Strong knowledge with SAML and Oauth and ideally OpenID Previous experience from any of these technologies: One Identity, SailPoint, Saviynt, Ubisecure, Ping Identity, would be advantageous
- Ping Identity Support Consultant- IAM Support
- upto €60,000 plus benefits
As the Ping Support specialist, you would be part of a team focused on Single Sign On (SSO) / Federation and Multifactor authentication, protecting our clients from unauthorized access and cyberattacks. The position is to provide 2nd/ 3rd line support, for the following tech. SSO, Federation, Reverse Proxy infrastructure, Apache servers, and its associated components and applications To be responsible for the day to day operational support, performance, tactical lifecycle management, and continuous improvement of the respective IT infrastructure. We are looking for someone with strong SAML and OAuth Knowledge as well as experience supporting the Ping portfolio of solutions Identity, Access, Federate
- IAM Architect Ping Identity, Access Federate
- Up to €110,000 plus benefits
An experienced Ping Identity Architect is needed for this global brand who are looking for someone who wants to join a growing Cyber Security team. We are looking for a senior Architect who can be responsible for the full IAM portfolio, including overseeing all BAU work as well as being responsible for the future strategy and development of the IAM portfolio further development and strategy You will be responsible for ensuring all architectures and best practices within the architecture framework are maintained and developed We are looking for someone with a strong Ping background, in Ping identity, federate, and Access, you will have worked as a senior consultant or architect in previous roles and ideally have some team-leading experience You will have good knowledge of architectural principles and patterns and their implementation into system and software design Experience in handling container technologies, cloud technologies, CI/CD (DevOps) and LDAP
- Security Engineer Contract £600 pd Outside IR35- SIEM, Vulnerability Management, DevSecOps
- United Kingdom
- £600 pd Outside IR35
Security Engineer Contract £600 pd Outside IR35 SIEM, Vulnerability Management, DevSecOps 6 month Contract Hybrid – some travel to London Google Chronicle – SIEM Crowdstike Spotlight – Vulnerability Management Google Cloud Platform - GCP Application security Core areas; Oversight of alerts with any improvement, fine tuning, enriching / use cases. Proactive vulnerability management – Prioritising and engaging with internal teams to remediate Advising / consulting within internal development teams to focus on, embed and evolve security as part of ongoing software / platform development. Push and enhance technical aspects of security forward. Beneficial experience Automation of security / data enrichment Looking to interview and engage ASAP