CVE-2024-23922 in XAV-AX5500
Summary
by MITRE • 09/23/2024
Sony XAV-AX5500 Insufficient Firmware Update Validation Remote Code Execution Vulnerability. This vulnerability allows physically present attackers to execute arbitrary code on affected installations of Sony XAV-AX5500 devices. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the handling of software updates. The issue results from the lack of proper validation of software update packages. An attacker can leverage this vulnerability to execute code in the context of the device.
Was ZDI-CAN-22939
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Analysis
by VulDB Data Team • 05/19/2025
The CVE-2024-23922 vulnerability represents a critical security flaw in Sony XAV-AX5500 automotive infotainment systems that demonstrates the growing concern of insufficient firmware validation mechanisms in connected vehicle ecosystems. This vulnerability specifically targets the device's update handling process, where the system fails to properly validate software update packages before installation. The flaw exists within the firmware update mechanism of the XAV-AX5500, which is part of Sony's automotive audio and navigation system lineup. The vulnerability allows for remote code execution without authentication, meaning that an attacker with physical access to the device can exploit this weakness to gain complete control over the system. This type of vulnerability is particularly dangerous in automotive environments where infotainment systems often serve as entry points for more sophisticated attacks against vehicle networks and safety-critical systems.
The technical nature of this vulnerability aligns with CWE-20, which describes "Improper Input Validation" in software systems, and more specifically with CWE-502, "Deserialization of Untrusted Data," when considering how firmware update packages are processed. The vulnerability stems from the absence of proper cryptographic signature verification and integrity checks during the firmware update process. When the XAV-AX5500 device receives an update package, it does not validate the authenticity or integrity of the data before installing it, creating an opportunity for malicious actors to inject arbitrary code. This flaw operates at the system level where the update mechanism fails to implement proper security controls that would normally be expected in embedded systems, particularly those designed for automotive applications where reliability and security are paramount. The lack of authentication requirements makes this vulnerability especially concerning as it can be exploited by anyone with physical access to the device, eliminating the need for sophisticated network-based attack vectors.
The operational impact of this vulnerability extends beyond simple code execution, creating potential risks for automotive cybersecurity and vehicle safety systems. Attackers could leverage this vulnerability to modify system behavior, install persistent backdoors, or potentially gain access to other connected vehicle systems through the compromised infotainment unit. The XAV-AX5500 device serves as a potential pivot point for attackers seeking to move laterally within vehicle networks, as many automotive systems share common communication protocols and network segments. This vulnerability demonstrates the critical importance of secure update mechanisms in embedded systems, particularly in automotive environments where the stakes are high and the consequences of exploitation can extend beyond simple data compromise to potentially affect vehicle operation and passenger safety. The vulnerability's classification as a remote code execution flaw means that even a simple physical presence attack could result in complete system compromise, making it a significant concern for automotive security professionals and fleet operators.
Mitigation strategies for this vulnerability should focus on implementing proper firmware validation mechanisms and establishing secure update protocols that align with automotive cybersecurity standards. Organizations should implement cryptographic signature verification for all firmware updates, ensuring that only authenticated and verified update packages can be installed on affected devices. The vulnerability highlights the necessity of following automotive security frameworks such as ISO/SAE 21434 for cybersecurity in road vehicles and NIST SP 800-160 for system security engineering. Security updates should be implemented through secure channels with proper authentication and integrity checks, and device manufacturers should consider implementing secure boot mechanisms to prevent unauthorized code execution. Additionally, network segmentation and monitoring should be deployed to detect potential exploitation attempts, while regular security assessments should be conducted to identify similar vulnerabilities in other vehicle systems. The vulnerability serves as a reminder that automotive cybersecurity requires comprehensive security measures throughout the entire vehicle lifecycle, from design and manufacturing to deployment and maintenance, emphasizing the critical need for robust firmware validation processes in connected vehicle systems.