CVE-2020-27212 : Vulnerability Insights and Analysis

STMicroelectronics STM32L4 devices through 2020-10-19 have incorrect access control. The flash read-out protection (RDP) can be degraded from RDP level 2 to level 1 by injecting a fault during the boot phase.

Understanding CVE-2020-27212

This CVE involves incorrect access control on STMicroelectronics STM32L4 devices, potentially allowing the degradation of flash read-out protection.

What is CVE-2020-27212?

CVE-2020-27212 refers to a vulnerability in STMicroelectronics STM32L4 devices that enables the lowering of flash read-out protection from level 2 to level 1 through a fault injection during the boot phase.

The Impact of CVE-2020-27212

The vulnerability can lead to a reduction in the security level of the flash read-out protection, potentially compromising the device's integrity and confidentiality of stored data.

Technical Details of CVE-2020-27212

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The vulnerability allows attackers to degrade the flash read-out protection level on STM32L4 devices, impacting the security of the device.

Affected Systems and Versions

Product: STMicroelectronics STM32L4 devices
Vendor: STMicroelectronics
Versions: All versions through 2020-10-19

Exploitation Mechanism

The vulnerability can be exploited by injecting a fault during the boot phase, enabling attackers to lower the flash read-out protection level.

Mitigation and Prevention

Protecting systems from CVE-2020-27212 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by STMicroelectronics promptly.
Monitor for any unauthorized access or changes to the device's flash read-out protection.
Implement strict access controls to prevent unauthorized physical access to the device.

Long-Term Security Practices

Regularly update firmware and software to address security vulnerabilities.
Conduct security assessments and penetration testing to identify and mitigate potential weaknesses.
Educate users and administrators on best security practices to prevent unauthorized access.

Patching and Updates

Stay informed about security advisories from STMicroelectronics and apply patches as soon as they are released.