EUVD-2025-16334

Comprehensive Technical Analysis of EUVD-2025-16334

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2025-16334 pertains to improper restriction of operations within the bounds of a memory buffer and stack-based buffer overflow in the Apache NuttX RTOS Bluetooth Stack, specifically affecting the HCI and UART components. This vulnerability can lead to system crashes, denial of service (DoS), or arbitrary code execution when maliciously crafted packets are received.

Severity Evaluation:

• Base Score: 9.8 (Critical)
• Base Score Version: CVSS 3.1
• Base Score Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

The high base score indicates a critical vulnerability due to the following factors:

• Attack Vector (AV:N): The vulnerability can be exploited remotely over the network.
• Attack Complexity (AC:L): The attack requires low complexity.
• Privileges Required (PR:N): No privileges are required to exploit the vulnerability.
• User Interaction (UI:N): No user interaction is required.
• Scope (S:U): The vulnerability does not change the security scope.
• Confidentiality (C:H), Integrity (I:H), Availability (A:H): All three security properties are highly impacted.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker can send specially crafted Bluetooth packets to the vulnerable HCI/UART stack, potentially leading to a buffer overflow.
• Local Exploitation: If an attacker has local access, they could manipulate the Bluetooth stack to trigger the vulnerability.

Exploitation Methods:

• Buffer Overflow: By sending maliciously crafted packets, an attacker can overflow the buffer, leading to arbitrary code execution or system crashes.
• Denial of Service (DoS): An attacker can send a large number of crafted packets to overwhelm the system, causing it to crash or become unresponsive.

3. Affected Systems and Software Versions

Affected Software:

• Apache NuttX RTOS versions from 7.25 to before 12.9.0.

Affected Components:

• Bluetooth HCI/UART stack.

Users:

• Any system or device running the affected versions of Apache NuttX RTOS and utilizing the Bluetooth HCI/UART stack.

4. Recommended Mitigation Strategies

Immediate Actions:

• Upgrade: Users are strongly advised to upgrade to Apache NuttX RTOS version 12.9.0, which includes fixes for the identified vulnerabilities.
• Patch Management: Ensure that all systems are regularly updated and patched to mitigate known vulnerabilities.

Long-term Strategies:

• Network Segmentation: Implement network segmentation to isolate critical systems and reduce the attack surface.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious activities and potential exploitation attempts.
• Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate potential risks.

5. Impact on European Cybersecurity Landscape

The vulnerability in Apache NuttX RTOS, a widely used real-time operating system, poses a significant risk to the European cybersecurity landscape. Given the critical nature of the vulnerability and its potential for remote exploitation, it could affect a wide range of IoT devices, industrial control systems, and other embedded systems that rely on Bluetooth communication. This underscores the importance of timely patching and robust security practices to protect critical infrastructure and sensitive data.

6. Technical Details for Security Professionals

Vulnerability Details:

• Type: Improper Restriction of Operations within the Bounds of a Memory Buffer and Stack-based Buffer Overflow.
• Components Affected: Bluetooth HCI/UART stack.
• Impact: System crash, DoS, arbitrary code execution.

Mitigation Steps:

• Code Review: Conduct a thorough code review of the Bluetooth stack to identify and fix similar vulnerabilities.
• Input Validation: Implement robust input validation to prevent buffer overflows.
• Memory Management: Ensure proper memory management practices to avoid out-of-bounds access.

References:

• GitHub Pull Request
• Apache Mailing List

Aliases:

• CVE-2025-35003

Assigner:

• Apache Software Foundation

EPSS:

• N/A

ENISA ID Product:

• Apache NuttX RTOS versions 7.25 to before 12.9.0

ENISA ID Vendor:

• Apache Software Foundation

By addressing this vulnerability promptly and implementing robust security measures, organizations can significantly reduce the risk of exploitation and ensure the integrity and availability of their systems.