EUVD-2023-27402

Comprehensive Technical Analysis of EUVD-2023-27402

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2023-27402 pertains to the Toybox.GenericChannel.setDeviceConfig API method in the CIQ API versions 1.2.0 through 4.1.7. The issue arises from the lack of parameter validation, which can lead to buffer overflows when copying various attributes. This flaw allows a malicious application to hijack the execution of the device's firmware by calling the API method with a specially crafted object.

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): Network (N)
• Attack Complexity (AC): Low (L)
• Privileges Required (PR): None (N)
• User Interaction (UI): None (N)
• Scope (S): Unchanged (U)
• Confidentiality (C): High (H)
• Integrity (I): High (H)
• Availability (A): High (H)

This vulnerability can be exploited remotely without requiring any special privileges or user interaction, making it highly dangerous.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker can exploit this vulnerability over the network by sending a specially crafted request to the setDeviceConfig API method.
• Malicious Applications: A malicious application installed on the device can call the vulnerable API method with crafted parameters to trigger the buffer overflow.

Exploitation Methods:

• Buffer Overflow: By sending a large or malformed input to the setDeviceConfig method, an attacker can cause a buffer overflow, leading to arbitrary code execution.
• Code Injection: The buffer overflow can be used to inject malicious code, allowing the attacker to take control of the device's firmware.

3. Affected Systems and Software Versions

Affected Systems:

• Devices running firmware that utilizes the CIQ API versions 1.2.0 through 4.1.7.
• Specifically, Garmin devices and other IoT devices that implement the Toybox API.

Software Versions:

• CIQ API versions 1.2.0 through 4.1.7.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Patching: Upgrade to the latest version of the CIQ API that includes a fix for this vulnerability.
• Input Validation: Implement strict input validation for all API methods to prevent buffer overflows.
• Access Control: Restrict access to the setDeviceConfig API method to trusted applications only.

Long-Term Mitigation:

• Code Review: Conduct thorough code reviews and security audits to identify and fix similar vulnerabilities.
• Security Training: Provide training for developers on secure coding practices and common vulnerabilities.
• Regular Updates: Ensure that all devices and software are regularly updated to the latest versions.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for IoT devices and wearable technology. The potential for remote exploitation and the high impact on confidentiality, integrity, and availability make it a critical concern for both consumers and enterprises. Organizations and individuals using affected devices should prioritize patching and implementing mitigation strategies to protect against potential attacks.

6. Technical Details for Security Professionals

Vulnerability Details:

• API Method: Toybox.GenericChannel.setDeviceConfig
• Issue: Lack of parameter validation leading to buffer overflows.
• Impact: Arbitrary code execution and firmware hijacking.

References:

• Garmin Developer Documentation
• Garmin CIQ App Research Advisory

Aliases:

• CVE: CVE-2023-23302
• GSD: GSD-2023-23302

Assigner:

• Mitre

EPSS:

• N/A

ENISA ID:

• Product: n/a
• Vendor: n/a

Security professionals should monitor for updates and advisories related to this vulnerability and ensure that all affected systems are patched promptly. Regular security assessments and penetration testing should be conducted to identify and mitigate similar vulnerabilities in the future.