CVE-2020-14372 : Vulnerability Insights and Analysis
Learn about CVE-2020-14372, a vulnerability in grub2 versions prior to 2.06 enabling attackers to bypass Secure Boot protections, compromising system integrity and confidentiality. Find mitigation steps and updates here.
A flaw in grub2 versions prior to 2.06 enables ACPI command usage when Secure Boot is enabled, allowing an attacker to craft a table to overwrite Linux kernel lockdown variable content, compromising system security.
Understanding CVE-2020-14372
What is CVE-2020-14372?
This vulnerability in grub2 versions prior to 2.06 enables attackers to bypass Secure Boot protections, compromising system integrity and confidentiality.
The Impact of CVE-2020-14372
The vulnerability poses a significant threat to data confidentiality, integrity, and system availability.
Technical Details of CVE-2020-14372
Vulnerability Description
The flaw in grub2 versions prior to 2.06 allows attackers to load unsigned code by crafting a table to overwrite Linux kernel lockdown variable content.
Affected Systems and Versions
- Product: grub2
- Vendor: n/a
- Versions Affected: grub 2.06
Exploitation Mechanism
Attackers with privileged access can craft a Secondary System Description Table (SSDT) to overwrite kernel content, bypassing Secure Boot lockdown.
Mitigation and Prevention
Immediate Steps to Take
- Update to grub2 version 2.06 or later
- Implement Secure Boot best practices
Long-Term Security Practices
- Regularly update system software
- Monitor and restrict privileged access
Patching and Updates
Apply patches provided by the vendor to address the vulnerability.