CVE-2022-2483 : Security Advisory and Response

This article provides details on CVE-2022-2483, a vulnerability affecting Nokia ASIK AirScale system module versions 474021A.101 and 474021A.102.

Understanding CVE-2022-2483

CVE-2022-2483 is a vulnerability in the bootloader of the Nokia ASIK AirScale system module, which could lead to the permanent disabling of secure boot on a device.

What is CVE-2022-2483?

The bootloader in the affected Nokia ASIK AirScale system module versions loads public keys for firmware verification signature. If an attacker manages to corrupt these keys by modifying flash contents, secure boot can be permanently disabled on the device.

The Impact of CVE-2022-2483

The impact of this vulnerability is significant, as it could allow threat actors to compromise the secure boot process, potentially leading to unauthorized access and control of the affected device.

Technical Details of CVE-2022-2483

Vulnerability Description

The vulnerability arises from the bootloader in the Nokia ASIK AirScale system module versions 474021A.101 and 474021A.102 loading public keys for firmware verification signature, which can be tampered with to disable secure boot.

Affected Systems and Versions

Product: ASIK AirScale
Vendor: Nokia
Affected Versions: 474021A.101, 474021A.102

Exploitation Mechanism

An attacker can exploit this vulnerability by modifying the flash contents to corrupt the public keys used by the firmware signature verification process, leading to the disabling of secure boot on the targeted device.

Mitigation and Prevention

Immediate Steps to Take

Nokia has released technical support notes with mitigation instructions for impacted users. It is recommended that affected users contact Nokia for further information and guidance on addressing the vulnerability.

Long-Term Security Practices

To enhance security posture, users are advised to follow best practices such as regular security updates, network segmentation, and access control policies to prevent unauthorized access to critical systems and devices.

Patching and Updates

Users should ensure they apply any security patches or updates provided by Nokia to address the CVE-2022-2483 vulnerability and protect their ASIK AirScale systems from potential exploitation.