CVE-2021-46753 : Security Advisory and Response
Learn about CVE-2021-46753 affecting various AMD processors. Failure to validate ASP sensor fusion hub headers can lead to data structure overwrites, risking confidentiality and integrity. Take immediate steps and follow patching guidance to secure your systems.
CVE-2021-46753 is a vulnerability that affects various AMD processors, potentially leading to a loss of confidentiality and integrity.
Understanding CVE-2021-46753
What is CVE-2021-46753?
Failure to validate the length fields of the AMD Secure Processor (ASP) sensor fusion hub headers may allow attackers to map the ASP sensor fusion hub region, leading to data structure overwrites.
The Impact of CVE-2021-46753
This vulnerability could result in a potential loss of confidentiality and integrity on affected systems.
Technical Details of CVE-2021-46753
Vulnerability Description
- Lack of length field validation in ASP sensor fusion hub headers
- Attackers with malicious Uapp or ABL can map the ASP region and overwrite data structures
Affected Systems and Versions
- Ryzen™ 2000/5000 Series Desktop Processors
- Athlon™ 3000 Series Mobile Processors
- Ryzen™ 2000/3000/5000 Series Mobile Processors
Exploitation Mechanism
- Attacker exploits the ASP sensor fusion hub headers' vulnerable length fields
- Mapping the ASP region with malicious Uapp or ABL
- Overwriting data structures leading to potential security breaches
Mitigation and Prevention
Immediate Steps to Take
- Apply patches and updates from the vendor
- Monitor for any unauthorized access or modifications
- Implement least privilege access controls
Long-Term Security Practices
- Regularly update and patch software and firmware
- Conduct cybersecurity training and awareness programs
- Perform regular security audits and assessments
Patching and Updates
- Refer to vendor advisory for specific patching instructions
- Regularly check for updates from AMD to address the vulnerability