CVE-2023-48698 : Security Advisory and Response

Azure RTOS USBX Remote Code Execution Vulnerability

Understanding CVE-2023-48698

Azure RTOS USBX is a USB host, device, and on-the-go (OTG) embedded stack integrated with Azure RTOS ThreadX. This CVE describes a remote code execution vulnerability due to expired pointer dereference within Azure RTOS USBX, impacting versions up to 6.2.1.

What is CVE-2023-48698?

CVE-2023-48698 refers to a remote code execution vulnerability in Azure RTOS USBX, allowing an attacker to exploit expired pointer dereference issues. The affected components include various functions/processes in the host stack and host classes related to device linked classes, GSER, and HID in RTOS versions up to v6.2.1.

The Impact of CVE-2023-48698

The impact of CVE-2023-48698 is significant, as it enables attackers to execute remote code on devices running vulnerable versions of Azure RTOS USBX. This could lead to unauthorized access, data theft, or further compromise of the embedded systems.

Technical Details of CVE-2023-48698

Vulnerability Description

The vulnerability arises from expired pointer dereference issues in Azure RTOS USBX, allowing attackers to manipulate memory pointers to execute malicious code remotely. The security flaw affects stack and classes related to device functionalities in vulnerable RTOS versions.

Affected Systems and Versions

Azure RTOS USBX versions up to 6.2.1 are affected by this vulnerability. Devices running these versions are at risk of exploitation by threat actors seeking to perform remote code execution attacks.

Exploitation Mechanism

Attackers can exploit the CVE-2023-48698 vulnerability by crafting malicious input to trigger expired pointer dereference issues in Azure RTOS USBX. By leveraging this weakness, threat actors can achieve remote code execution on the target device.

Mitigation and Prevention

Immediate Steps to Take

To mitigate the risks associated with CVE-2023-48698, users are strongly advised to update their Azure RTOS USBX installations to version 6.3.0 or above. This release includes essential security patches to address the identified vulnerabilities.

Long-Term Security Practices

Implementing secure coding practices, conducting regular security audits, and staying informed about the latest vulnerabilities are essential for safeguarding embedded systems against remote code execution threats. Additionally, restricting network access can help minimize the attack surface.

Patching and Updates

Regularly applying security updates and patches provided by Azure RTOS is crucial for maintaining the integrity and security of embedded systems. Users must prioritize timely updates to prevent exploitation of known vulnerabilities.