CVE-2021-46758 : Security Advisory and Response
Find out about CVE-2021-46758 where the AMD Secure Processor bootloader validation flaw may allow data compromise. Learn the impact, affected systems, and mitigation steps.
This CVE record pertains to an insufficient validation vulnerability in the AMD Secure Processor (ASP) bootloader, potentially leading to data compromise.
Understanding CVE-2021-46758
What is CVE-2021-46758?
The vulnerability involves inadequate validation of SPI flash addresses in the AMD Secure Processor bootloader. This flaw could be exploited by an attacker to read data beyond the SPI flash, risking data availability and integrity.
The Impact of CVE-2021-46758
This vulnerability poses a risk of unauthorized data access and potential compromise of system integrity. Attackers leveraging this issue could lead to a loss of availability and potential data exposure.
Technical Details of CVE-2021-46758
Vulnerability Description
The vulnerability in the ASP bootloader allows attackers to read data beyond the designated SPI flash addresses, potentially leading to data compromise.
Affected Systems and Versions
- Ryzen™ 5000 Series Desktop Processor with Radeon™ Graphics “Cezanne”
- Ryzen™ 7000 Series Desktop Processors “Raphael” XD3
- Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics “Renoir” FP6
- Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics “Lucienne”
- Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics “Cezanne”
- AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics “Rembrandt”
- AMD Ryzen™ 7035 Series Processors with Radeon™ Graphics “Rembrandt-R”
- AMD Ryzen™ 5000 Series Processors with Radeon™ Graphics “Barcelo”
- AMD Ryzen™ 7030 Series Mobile Processors with Radeon™ Graphics “Barcelo-R”
Exploitation Mechanism
Attackers can exploit the vulnerability by manipulating SPI flash addresses in the ASP bootloader to access unauthorized data beyond the intended memory boundaries.
Mitigation and Prevention
Immediate Steps to Take
- Implement the security patches provided by AMD promptly
- Monitor system logs for any suspicious activities
- Restrict network access for vulnerable systems
Long-Term Security Practices
- Regularly update system firmware and software
- Conduct security training for system administrators
- Employ network segmentation to limit the attack surface
Patching and Updates
Apply the patches released by AMD to address this vulnerability and ensure the security of the affected systems.