Incident: Bluetooth Vulnerabilities in SoC Software Development Kits Impacting Devices

Published Date: 2020-02-20

Postmortem Analysis
Timeline 1. The software failure incident of the SweynTooth vulnerabilities in Bluetooth software happened in January 2019, when researchers from Singapore University of Technology and Design began developing techniques to analyze Wi-Fi security, which later led to the discovery of the Bluetooth bugs [95560].
System 1. Bluetooth Low Energy (BLE) software development kits from seven "system on a chip" products [95560]
Responsible Organization 1. System on chip (SoC) manufacturers such as Texas Instruments, NXP, Cypress, and Telink Semiconductor were responsible for causing the software failure incident by having vulnerabilities in their BLE software development kits [95560].
Impacted Organization 1. Fitness trackers, smart locks, medical tools, and implants were impacted by the Bluetooth vulnerabilities [95560]. 2. IoT manufacturers using the affected system on a chip (SoC) products were impacted [95560]. 3. Bluetooth and BLE implementation issues were common across various devices [95560]. 4. SoC manufacturers such as Texas Instruments, NXP, Cypress, and Telink Semiconductor were impacted and had to release patches [95560].
Software Causes 1. The failure incident was caused by 12 Bluetooth bugs collectively dubbed "SweynTooth" found in certain implementations of Bluetooth Low Energy (BLE) software development kits that come with system on a chip products [95560].
Non-software Causes 1. Lack of thorough security testing by SoC manufacturers [95560] 2. Complexity and size of Bluetooth and BLE standards leading to implementation issues [95560] 3. Challenges in updating and patching affected devices due to the lengthy process involved [95560]
Impacts 1. The software failure incident involving the SweynTooth vulnerabilities impacted over 480 devices, including fitness trackers, smart locks, medical tools, and implants [95560]. 2. The vulnerabilities could allow a hacker within radio range to crash targeted devices, disable their BLE connection, or even take over certain devices, posing serious risks to users' privacy and security [95560]. 3. Manufacturers of devices relying on vulnerable SoCs needed to individually test their products to determine feasible attacks and necessary patches, highlighting the significant effort required to address the vulnerabilities [95560]. 4. Some SoC makers like Texas Instruments, NXP, Cypress, and Telink Semiconductor released patches, while others like STMicroelectronics and Microchip were still working on developing fixes, indicating varying responses to the incident [95560]. 5. The incident underscored the critical importance of chip-level security in IoT devices and the challenges associated with patching vulnerabilities in a timely manner, especially in devices like pacemakers that require careful consideration for updates [95560].
Preventions 1. More thorough security testing during the development phase could have potentially prevented the software failure incident by identifying the SweynTooth vulnerabilities before they were exploited [95560]. 2. Implementing regular security audits and assessments on the Bluetooth software development kits used in devices could have helped in detecting and addressing any vulnerabilities proactively [95560]. 3. Manufacturers could have ensured timely patch releases for the affected SoCs to mitigate the risks associated with the SweynTooth bugs [95560]. 4. Enhancing the certification process for devices using Bluetooth technology to include stricter security checks and requirements could have raised awareness and prevented such vulnerabilities from going unnoticed [95560].
Fixes 1. Patching the vulnerabilities in the BLE software development kits provided by the SoC manufacturers [95560] 2. Individual manufacturers testing their products to determine feasible attacks and necessary patches [95560] 3. Adapting and installing patches for affected devices [95560]
References 1. Researchers from Singapore University of Technology and Design [95560] 2. Bluetooth Special Interest Group 3. SoC manufacturers such as Texas Instruments, NXP, Cypress, Telink Semiconductor, Dialog Semiconductors, STMicroelectronics, and Microchip 4. Ben Seri, vice president of research at Armis 5. FDA spokesperson

Software Taxonomy of Faults

Category Option Rationale
Recurring multiple_organization (a) The software failure incident related to Bluetooth vulnerabilities, known as SweynTooth, affected multiple organizations as it was found in the BLE software development kits that come with seven "system on a chip" products used by various IoT manufacturers [95560]. The vulnerabilities were identified in products ranging from smart home devices to medical tools and implants, indicating a widespread impact across different organizations utilizing these vulnerable SoCs. (b) The SweynTooth Bluetooth vulnerabilities were reported in products from various manufacturers such as Texas Instruments, NXP, Cypress, Telink Semiconductor, Dialog Semiconductors, STMicroelectronics, and Microchip [95560]. These organizations had to release patches to address the vulnerabilities in their products, highlighting the widespread nature of the software failure incident across multiple organizations.
Phase (Design/Operation) design, operation (a) The software failure incident related to the design phase is evident in the article. The vulnerabilities in the Bluetooth software were not inherent to the Bluetooth Low Energy (BLE) protocol itself but were found in the BLE software development kits that come with system on a chip (SoC) products. These SoCs are used by IoT manufacturers to quickly develop new products, but flaws in the SoC implementation can propagate across a wide range of devices, leading to vulnerabilities like the SweynTooth bugs. The article highlights that the SoC manufacturers missed some basic security red flags during the design and development of the software [95560]. (b) The software failure incident related to the operation phase is also apparent in the article. The vulnerabilities in the Bluetooth software could be exploited by a hacker within radio range to launch attacks that could crash targeted devices entirely, disable their BLE connection until a restart, or even bypass BLE's secure pairing mode to take control of the devices. This indicates that the operation or misuse of the devices, such as being within radio range of a potential attacker, could lead to the exploitation of the vulnerabilities present in the software [95560].
Boundary (Internal/External) within_system (a) within_system: The software failure incident related to the Bluetooth vulnerabilities, known as SweynTooth, was primarily due to flaws in the BLE software development kits that come with system on a chip (SoC) products. These SoCs integrate all components of a computer in one place, and the bugs existed in the implementation of these SoCs. The vulnerabilities were not inherent to Bluetooth Low Energy itself but were a result of implementation flaws in the SoCs used by various IoT manufacturers [95560]. (b) outside_system: The software failure incident related to the Bluetooth vulnerabilities was not due to contributing factors originating from outside the system. The vulnerabilities could not be exploited over the internet, and attacks could only be launched by a hacker within radio range of the targeted devices. The flaws were found within the BLE software development kits that came with the SoCs, indicating that the vulnerabilities were internal to the system [95560].
Nature (Human/Non-human) non-human_actions, human_actions (a) The software failure incident in this case was primarily due to non-human actions, specifically flaws in the BLE software development kits that come with certain system on a chip (SoC) products. These flaws, collectively known as "SweynTooth," were not inherent to Bluetooth Low Energy (BLE) itself but were introduced in the SoC implementations. The vulnerabilities could be exploited by a hacker within radio range to crash targeted devices, disable their BLE connection, or even bypass BLE's secure pairing mode. The SoC manufacturers have been working on releasing patches to address these non-human introduced vulnerabilities [95560]. (b) However, human actions also played a role in this software failure incident. The researchers highlighted that some of the SoC manufacturers missed basic security red flags during the development process. They mentioned that with more security testing, these issues could have been identified earlier. Additionally, the challenge lies in individual manufacturers needing to adapt the patches released by the SoC makers to their specific products and convince customers to install them. This process involves human actions in terms of implementing the necessary security updates across affected devices [95560].
Dimension (Hardware/Software) hardware, software (a) The software failure incident in the article is related to hardware as it discusses vulnerabilities found in Bluetooth Low Energy (BLE) software development kits that come with certain system on a chip (SoC) products. The vulnerabilities, collectively dubbed "SweynTooth," exist in the SoC implementation flaws, which can affect a wide variety of devices including fitness trackers, smart locks, medical tools, and implants [95560]. (b) The software failure incident is also related to software as it involves bugs found in the BLE software development kits that are part of the SoCs. These bugs can be exploited by hackers within radio range to crash targeted devices, disable their BLE connection, or even bypass BLE's secure pairing mode to take control of the devices. The article highlights that the SoC manufacturers missed some basic security red flags, indicating software-related issues in the development process [95560].
Objective (Malicious/Non-malicious) malicious, non-malicious (a) The software failure incident discussed in the article is related to malicious intent. The vulnerabilities, collectively dubbed "SweynTooth," were discovered in the BLE software development kits that come with certain system on a chip products. These vulnerabilities could be exploited by a hacker within radio range to crash targeted devices, disable their BLE connection, or even take them over. The article mentions that the researchers did not develop proof of concept attacks against potentially vulnerable medical devices, but the vulnerabilities could be used to crash communication functions or the entire device, posing serious risks, especially in the medical context [95560]. (b) The software failure incident is also related to non-malicious factors such as implementation issues in the BLE software development kits. The vulnerabilities were found in the BLE software development kits that come with system on a chip products, indicating flaws in the implementation of the Bluetooth Low Energy protocol. The article highlights that the SoC manufacturers missed some basic security red flags, and the vulnerabilities were not due to the BLE protocol itself but rather the implementation flaws in the SoCs [95560].
Intent (Poor/Accidental Decisions) poor_decisions (a) The software failure incident related to the Bluetooth vulnerabilities, known as SweynTooth, can be attributed to poor decisions made by the SoC manufacturers. The vulnerabilities were not in the Bluetooth Low Energy (BLE) protocol itself but in the BLE software development kits that come with the SoCs. The SoC manufacturers missed some basic security red flags, and the researchers found that with a little more security testing, these issues could have been identified earlier [95560]. The fact that some manufacturers have already released patches while others are still working on them highlights the consequences of poor decisions in the development and testing processes of these SoCs.
Capability (Incompetence/Accidental) development_incompetence, accidental (a) The software failure incident in the article is related to development incompetence. The vulnerabilities in the Bluetooth software were discovered by researchers from Singapore University of Technology and Design who were initially analyzing Wi-Fi security and later applied the same methods to assess Bluetooth. They found bugs in certain implementations of Bluetooth Low Energy, specifically in the BLE software development kits that come with system on a chip products. The researchers noted that the SoC manufacturers missed some basic security red flags, and with more security testing, these issues could have been found earlier [95560]. Manufacturers of IoT devices using the affected SoCs had to individually test their products to determine feasible attacks and necessary patches, highlighting the lack of thorough security testing during development. (b) The software failure incident can also be attributed to accidental factors. The vulnerabilities in the Bluetooth software, collectively known as "SweynTooth," were not intentionally created but were a result of flaws in the BLE software development kits that were integrated into various devices. The researchers did not develop proof of concept attacks against potentially vulnerable medical devices, indicating that the vulnerabilities were not deliberately introduced but were discovered as unintended consequences of the SoC implementation flaws [95560].
Duration temporary The software failure incident described in the article is temporary. The vulnerabilities identified in the Bluetooth software development kits, collectively known as "SweynTooth," can be exploited by a hacker within radio range to crash targeted devices, disable their BLE connection until a restart, or even bypass BLE's secure pairing mode to take them over. Manufacturers have been working on releasing patches to address these vulnerabilities, but the process of updating all affected devices is challenging and time-consuming [95560].
Behaviour crash (a) crash: The software failure incident in the article is related to a crash behavior where the vulnerabilities in the Bluetooth software development kits can lead to attacks that crash targeted devices entirely, disable their BLE connection until a restart, or even bypass BLE's secure pairing mode to take them over [95560]. (b) omission: There is no specific mention of the software failure incident omitting to perform its intended functions at an instance(s) in the article. (c) timing: The software failure incident is not related to timing issues where the system performs its intended functions correctly but too late or too early. (d) value: The software failure incident is not related to the system performing its intended functions incorrectly. (e) byzantine: The software failure incident is not related to the system behaving erroneously with inconsistent responses and interactions. (f) other: The software failure incident in the article can be categorized as a crash behavior due to the vulnerabilities in the Bluetooth software development kits leading to various types of attacks on devices [95560].

IoT System Layer

Layer Option Rationale
Perception processing_unit, embedded_software (a) sensor: The software failure incident related to Bluetooth vulnerabilities, known as SweynTooth, does not directly involve sensor errors. Instead, it focuses on flaws in the Bluetooth Low Energy (BLE) software development kits that come with system on a chip (SoC) products, affecting a wide range of devices including fitness trackers, smart locks, medical tools, and implants [Article 95560]. (b) actuator: The SweynTooth vulnerabilities in the BLE software development kits do not specifically mention actuator errors as contributing factors to the software failure incident [Article 95560]. (c) processing_unit: The software failure incident is primarily related to issues in the BLE software development kits that are part of the SoCs, indicating a failure due to contributing factors introduced by processing errors in the embedded software [Article 95560]. (d) network_communication: The SweynTooth vulnerabilities do not stem from network communication errors but rather from flaws in the BLE software development kits within the SoCs, affecting devices within radio range and enabling attacks to crash targeted devices, disable BLE connections, or bypass secure pairing modes [Article 95560]. (e) embedded_software: The software failure incident is directly linked to embedded software errors within the BLE software development kits that come with SoCs, leading to vulnerabilities that could be exploited by hackers to compromise various devices, including medical tools and implants [Article 95560].
Communication link_level The software failure incident described in the article [95560] is related to the communication layer of the cyber physical system that failed at the link_level. The failure was due to vulnerabilities in the Bluetooth Low Energy (BLE) software development kits that come with certain system on a chip (SoC) products. These vulnerabilities, collectively known as "SweynTooth," exist in the BLE software development kits integrated into the SoCs, which are used in a wide range of devices including fitness trackers, smart locks, medical tools, and implants. The vulnerabilities could be exploited by a hacker within radio range to crash targeted devices, disable their BLE connection, or even take them over by bypassing BLE's secure pairing mode. The SoC manufacturers have been working on releasing patches to address these vulnerabilities, but the process of updating affected devices, especially critical ones like pacemakers, is challenging and time-consuming. Manufacturers need to individually test their products to determine the feasibility of attacks and apply necessary patches.
Application TRUE The software failure incident described in the articles is related to the Bluetooth Low Energy (BLE) software development kits that come with certain system on a chip (SoC) products. The vulnerabilities, collectively dubbed "SweynTooth," exist in the BLE software development kits of seven SoC products, which integrate all components of a computer in one place. These vulnerabilities can be exploited by a hacker within radio range to crash targeted devices, disable their BLE connection, or even bypass BLE's secure pairing mode to take control of the devices. The flaws were found in the implementation of BLE, specifically in the BLE software development kits provided by the SoC manufacturers [95560]. Therefore, the software failure incident described in the articles is related to the application layer of the cyber physical system that failed, as it involves vulnerabilities introduced by bugs in the BLE software development kits provided by the SoC manufacturers.

Other Details

Category Option Rationale
Consequence death, harm, property, non-human, theoretical_consequence (a) death: The article mentions that the vulnerabilities discovered in Bluetooth software could potentially impact medical devices such as pacemakers and blood glucose monitors. While the researchers did not develop proof of concept attacks against these devices, the relevant SoCs contain bugs that could be used to crash the communication functions or the whole device, which could potentially lead to fatal consequences [95560]. (b) harm: The vulnerabilities in Bluetooth software could potentially harm individuals who rely on medical devices like pacemakers and blood glucose monitors. The bugs found in the SoCs could be used to crash the communication functions or the entire device, posing a risk to the health and safety of users [95560]. (d) property: The software failure incident related to the Bluetooth vulnerabilities could impact people's property in the form of medical devices, smart home devices, and enterprise equipment. The vulnerabilities could lead to attacks that crash targeted devices, disable their connections, or even take them over, potentially causing damage to the devices themselves [95560]. (h) theoretical_consequence: The article discusses potential consequences of the software failure incident, particularly in the medical context. While the researchers did not develop proof of concept attacks against vulnerable medical devices, the vulnerabilities in the SoCs could theoretically be exploited to crash communication functions or the entire device, highlighting the potential risks involved [95560].
Domain health (a) The software failure incident mentioned in the article is related to the health industry. The vulnerabilities discovered in the Bluetooth software development kits could potentially affect a wide range of medical devices, including pacemakers, blood glucose monitors, and other medical tools and implants [95560]. The impact of these vulnerabilities is particularly critical in the medical context due to the potential risks associated with compromised communication functions or device operations in medical devices.

Sources

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