CVE-2021-27138 : Security Advisory and Response

A detailed overview of CVE-2021-27138, a vulnerability in the boot loader Das U-Boot before 2021.04-rc2 that mishandles unit addresses in a FIT.

Understanding CVE-2021-27138

This section covers what CVE-2021-27138 entails, its impact, technical details, and mitigation steps.

What is CVE-2021-27138?

The vulnerability in Das U-Boot before 2021.04-rc2 leads to mismanagement of unit addresses within a FIT, posing a security risk.

The Impact of CVE-2021-27138

With a CVSS base score of 7.8 (High Severity), this vulnerability can cause high impacts on confidentiality, integrity, and availability.

Technical Details of CVE-2021-27138

Dive into the specifics of CVE-2021-27138 to understand the vulnerability better.

Vulnerability Description

The boot loader in Das U-Boot before 2021.04-rc2 mishandles the use of unit addresses in a FIT file.

Affected Systems and Versions

All versions of Das U-Boot before 2021.04-rc2 are affected by this vulnerability.

Exploitation Mechanism

The vulnerability can be exploited locally with no special privileges required, leading to high confidentiality, integrity, and availability impacts.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-27138.

Immediate Steps to Take

Update Das U-Boot to version 2021.04-rc2 or later to address the vulnerability and enhance system security.

Long-Term Security Practices

Regularly monitor for updates and security advisories related to Das U-Boot to stay protected against emerging threats.

Patching and Updates

Install patches and updates promptly to ensure your systems are protected from vulnerabilities like CVE-2021-27138.