Incident: Vulnerabilities in Dell BIOSConnect Firmware Update Mechanism.

Published Date: 2021-06-24

Postmortem Analysis
Timeline 1. The software failure incident with vulnerabilities in Dell firmware, specifically in the BIOSConnect feature, was reported in the article published on 2021-06-24 [115579]. Therefore, the software failure incident with vulnerabilities in Dell firmware likely happened before June 2021, but the exact date is unknown.
System 1. Dell computers - 128 recent models of Dell computers, including desktops, laptops, and tablets [115579]
Responsible Organization 1. Dell - The software failure incident was caused by vulnerabilities in the BIOSConnect feature of Dell computers, affecting 128 recent models and exposing 30 million devices [115579].
Impacted Organization 1. Dell computers, including desktops, laptops, and tablets, were impacted by the software failure incident due to vulnerabilities in the BIOSConnect feature [115579].
Software Causes 1. The software causes of the failure incident were four rudimentary bugs in the Dell feature called BIOSConnect, which allowed for full access to target devices [115579].
Non-software Causes 1. Lack of monitoring or logging at the firmware level [Article 115579] 2. Vulnerabilities in the foundational computer code known as firmware [Article 115579] 3. Vulnerabilities in a Dell feature called BIOSConnect [Article 115579] 4. Lack of secure update mechanisms for firmware [Article 115579]
Impacts 1. The software failure incident exposed 30 million devices in total, affecting 128 recent models of Dell computers, including desktops, laptops, and tablets [115579]. 2. The vulnerabilities allowed attackers to gain full access to target devices, compromising firmware and potentially giving them full control of the machine [115579]. 3. The incident highlighted the lack of monitoring or logging at the firmware level, making it attractive for hackers to exploit the vulnerabilities and remain undetected inside a target's networks [115579]. 4. Dell released patches for the flaws, but users were cautioned against automatically downloading the updates due to the vulnerability of the BIOSConnect mechanism itself [115579].
Preventions 1. Regular security audits and testing of firmware code to identify and address vulnerabilities before they can be exploited [115579]. 2. Implementing robust monitoring and logging mechanisms at the firmware level to detect and respond to unauthorized access attempts [115579]. 3. Following best practices in firmware security features development to ensure that new updates and mechanisms are designed with security in mind [115579]. 4. Promptly applying security patches and updates provided by the software vendor to mitigate known vulnerabilities [115579]. 5. Educating users on the importance of updating firmware and providing clear instructions on how to manually download and install updates from trusted sources [115579].
Fixes 1. Dell releasing patches for the vulnerabilities in the BIOSConnect feature [115579] 2. Manually downloading and installing the updates from Dell's Drivers and Downloads website [115579]
References 1. Researchers at the security firm Eclypsium [115579]

Software Taxonomy of Faults

Category Option Rationale
Recurring one_organization, multiple_organization (a) The software failure incident has happened again at Dell. The article reports that a well-intentioned mechanism to easily update the firmware of Dell computers, called BIOSConnect, was found to be vulnerable due to four rudimentary bugs. This vulnerability could be exploited to gain full access to target devices, affecting 128 recent models of Dell computers [115579]. (b) The software failure incident has also happened at other organizations. The article mentions that update mechanisms are valuable targets for attackers, as they can be tainted to distribute malware. This incident highlights the broader issue of firmware security vulnerabilities across the industry, not just limited to Dell products.
Phase (Design/Operation) design, operation (a) The software failure incident related to the development phase can be attributed to design factors introduced during system development. The vulnerabilities in the Dell firmware update mechanism, specifically in BIOSConnect, were a result of four rudimentary bugs that allowed attackers to gain full access to target devices [115579]. These vulnerabilities were present in a feature designed to easily update firmware, indicating a flaw in the design of the system update process. (b) The software failure incident can also be linked to operational factors, particularly in the operation or misuse of the system. Attackers could exploit the vulnerabilities in BIOSConnect to remotely control the firmware of victim devices, potentially compromising the entire system. While attackers needed a foothold into the internal network of victim devices to exploit the bugs, the ease of exploitation and lack of monitoring at the firmware level made these vulnerabilities attractive to hackers [115579].
Boundary (Internal/External) within_system, outside_system The software failure incident related to the Dell firmware vulnerabilities falls under both within_system and outside_system boundaries: (a) within_system: The vulnerabilities in the Dell BIOSConnect feature, which is part of the broader Dell update and remote operating system management feature called SupportAssist, were identified as contributing factors originating from within the system [115579]. (b) outside_system: Attackers exploiting the vulnerabilities needed to have a foothold into the internal network of victim devices, indicating that the attack vectors originated from outside the system [115579].
Nature (Human/Non-human) non-human_actions, human_actions (a) The software failure incident in this case is primarily due to non-human actions, specifically the presence of four rudimentary bugs in the Dell BIOSConnect feature that allowed for vulnerabilities to be exploited by attackers [115579]. These vulnerabilities were not intentionally introduced by humans but were inherent in the firmware code, making it easier for attackers to gain full access to target devices. (b) However, human actions also play a role in this incident as researchers at the security firm Eclypsium discovered these vulnerabilities and disclosed them to Dell, prompting the company to release patches to address the flaws [115579]. Additionally, users are advised to manually install the updates from Dell's website to ensure the security of their devices, highlighting the importance of human intervention in mitigating the impact of software failures caused by non-human actions.
Dimension (Hardware/Software) hardware, software (a) The software failure incident reported in Article 115579 is related to hardware. The vulnerabilities discovered in Dell's BIOSConnect feature, which allows for firmware updates, expose 30 million devices to potential exploitation. These vulnerabilities could be exploited to gain full access to target devices by compromising the firmware, which is a fundamental part of the hardware system. The attack allows hackers to go directly to the BIOS, which runs as a precursor to the computer's operating system and applications, giving them full control of the machine [115579]. (b) The software failure incident is also related to software. The vulnerabilities found in the BIOSConnect feature of Dell computers are due to four rudimentary bugs in the firmware update mechanism. These bugs could be exploited to gain remote control of the firmware, indicating a failure in the software implementation of the update mechanism. The vulnerabilities in the software allowed for potential exploitation by attackers to compromise the firmware and gain control of the target devices [115579].
Objective (Malicious/Non-malicious) malicious (a) The software failure incident described in the article is malicious in nature. The vulnerabilities in the Dell BIOSConnect feature were identified as being exploitable by attackers to gain full access to target devices. The vulnerabilities could be used to remotely control the firmware of the devices, potentially allowing attackers to compromise the entire system. The article highlights that attackers could exploit these vulnerabilities to gain persistence within a target's networks, emphasizing the attractiveness of such vulnerabilities to hackers [115579].
Intent (Poor/Accidental Decisions) poor_decisions (a) The intent of the software failure incident in this case seems to be more aligned with poor_decisions. The vulnerabilities in the Dell firmware update mechanism were a result of four rudimentary bugs that could be exploited to gain full access to target devices. Despite the industry's maturity in security features for applications and operating systems, the firmware security features were not following best practices, leading to these vulnerabilities [115579].
Capability (Incompetence/Accidental) development_incompetence (a) The software failure incident related to development incompetence is evident in the article. Researchers at the security firm Eclypsium discovered four rudimentary bugs in a mechanism designed to easily update the firmware of Dell computers. These vulnerabilities could be exploited to gain full access to target devices, affecting 128 recent models of Dell computers. The vulnerabilities were described as being on "easy mode to exploit" and akin to security vulnerabilities from the '90s, indicating a lack of adherence to best practices in new firmware security features [115579]. (b) The software failure incident related to accidental factors is not explicitly mentioned in the provided article.
Duration temporary The software failure incident reported in the article [115579] is temporary. The vulnerabilities in the Dell BIOSConnect feature were identified by researchers, reported to Dell, and patches were released to address the flaws. The incident is not permanent as remediation steps were taken to mitigate the vulnerabilities, indicating that the failure was due to contributing factors introduced by certain circumstances but not all.
Behaviour other (a) crash: The software failure incident in the article is not related to a crash where the system loses state and does not perform any of its intended functions. The vulnerabilities discovered in the Dell firmware could be exploited to gain full access to target devices, allowing attackers to remotely control the firmware and compromise the device's security [115579]. (b) omission: The software failure incident does not involve the system omitting to perform its intended functions at an instance(s). Instead, the vulnerabilities in the Dell firmware could be exploited to individually target victim devices and easily gain remote control of the firmware, potentially leading to full control of the machine [115579]. (c) timing: The software failure incident is not related to timing issues where the system performs its intended functions too late or too early. The vulnerabilities in the Dell firmware allow attackers to compromise the firmware before the operating system even boots, providing an evasive and powerful set of vulnerabilities for attackers seeking persistence [115579]. (d) value: The software failure incident is not due to the system performing its intended functions incorrectly. Instead, the vulnerabilities in the Dell firmware could be exploited to gain full access to target devices, compromising the security of the machines [115579]. (e) byzantine: The software failure incident does not involve the system behaving erroneously with inconsistent responses and interactions. The vulnerabilities in the Dell firmware allow attackers to gain remote control of the firmware, potentially remaining undetected inside a target's networks for an extended period [115579]. (f) other: The software failure incident in the article involves vulnerabilities in the Dell firmware that could be exploited to gain full access to target devices, compromising the security of the machines. The attack allows hackers to go directly to the BIOS, compromising the firmware before the operating system boots, and potentially leading to long-term undetected access for attackers [115579].

IoT System Layer

Layer Option Rationale
Perception None None
Communication None None
Application None None

Other Details

Category Option Rationale
Consequence property, theoretical_consequence (d) property: People's material goods, money, or data was impacted due to the software failure The software failure incident involving vulnerabilities in Dell's BIOSConnect feature could have led to attackers gaining full control of the firmware on Dell computers. This could result in compromising a device's firmware, giving attackers full control of the machine, potentially leading to significant property damage or data loss for the users affected [115579].
Domain information (a) The software failure incident discussed in the article is related to the information industry. The vulnerabilities discovered in Dell's BIOSConnect feature, which is part of the SupportAssist system, could be exploited to gain full access to target devices, affecting millions of Dell computers [Article 115579].

Sources

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