CVE-2019-14239 : Exploit Details and Defense Strategies

Flash Access Controls (FAC) on NXP Kinetis KV1x, KV3x, and K8x devices can be bypassed, exposing protected code in CPU registers.

Understanding CVE-2019-14239

Flash Access Controls (FAC) on NXP Kinetis devices are vulnerable to a bypass technique that compromises the IP protection mechanism.

What is CVE-2019-14239?

The vulnerability allows an attacker to bypass FAC on specific NXP Kinetis devices, revealing protected code despite IP protection.

The Impact of CVE-2019-14239

Attackers can access protected code through a load instruction within the execute-only section.
This bypasses the FAC method, potentially leading to unauthorized access and exploitation of sensitive information.

Technical Details of CVE-2019-14239

Flash Access Controls (FAC) vulnerability details and affected systems.

Vulnerability Description

FAC on NXP Kinetis KV1x, KV3x, and K8x devices can be circumvented using a load instruction in the execute-only section.

Affected Systems and Versions

NXP Kinetis KV1x, KV3x, and K8x devices are impacted.

Exploitation Mechanism

Utilizing a load instruction within the execute-only section to expose protected code in a CPU register.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2019-14239.

Immediate Steps to Take

Implement strict access controls and monitoring mechanisms.
Regularly update firmware and security patches.

Long-Term Security Practices

Conduct regular security assessments and penetration testing.
Educate users on secure coding practices and awareness.

Patching and Updates

Apply vendor-supplied patches promptly to address the vulnerability.