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CVE-2025-20700: Permission Bypass Vulnerability in Airoha Bluetooth Audio SDK

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Overview

The Common Vulnerabilities and Exposures (CVE) system has identified a serious vulnerability in the Airoha Bluetooth audio SDK, which has been designated as CVE-2025-20700. This vulnerability threatens all systems that utilise this Bluetooth audio SDK, potentially leading to unauthorised access to critical data through the Bluetooth Low Energy (LE) GATT service.
The significance of this vulnerability lies in its potential to lead to a remote escalation of privilege, without the need for additional execution privileges and without requiring user interaction. This makes it a critical risk for all systems and devices using the Airoha Bluetooth audio SDK, as it can result in system compromise and data leakage.

Vulnerability Summary

CVE ID: CVE-2025-20700
Severity: High (8.8 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Escalation of privilege, potential system compromise, and data leakage.

Affected Products

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Product | Affected Versions

Airoha Bluetooth Audio SDK | All versions

How the Exploit Works

The CVE-2025-20700 vulnerability is a permission bypass issue that resides within the Airoha Bluetooth audio SDK. This vulnerability can be exploited through the Bluetooth LE GATT service, which is specifically designed for short-range wireless communication.
An attacker can exploit this vulnerability by sending a specially crafted request to the Bluetooth LE GATT service. The vulnerability allows the attacker to bypass the permissions needed to access the critical data of the RACE protocol. This can lead to an escalation of privilege, granting the attacker the ability to manipulate or compromise the system remotely.

Conceptual Example Code

Below is a conceptual example of how an attacker might send a specially crafted request to exploit the vulnerability:

POST /BluetoothLE/GATT/endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "exploit_payload": "permission_bypass_data" }

In this example, the attacker sends a POST request to the Bluetooth LE GATT service with a JSON payload designed to exploit the permission bypass vulnerability.

Mitigation Guidance

The recommended mitigation for the CVE-2025-20700 vulnerability is to apply a patch from the vendor as soon as it becomes available. In the meantime, systems can be temporarily protected by using a web application firewall (WAF) or intrusion detection system (IDS) to detect and block attempts to exploit this vulnerability.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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