CVE-2021-46773 : Security Advisory and Response

CVE-2021-46773 is a vulnerability that involves insufficient input validation in ABL, which may allow a privileged attacker to corrupt ASP memory, leading to integrity loss or code execution.

Understanding CVE-2021-46773

What is CVE-2021-46773?

The CVE-2021-46773 vulnerability stems from inadequate input validation in ABL, potentially granting a privileged attacker the ability to compromise ASP memory, which can result in integrity loss or unauthorized code execution.

The Impact of CVE-2021-46773

The impact of CVE-2021-46773 can be severe, as it allows attackers with elevated privileges to manipulate ASP memory, leading to integrity compromise or the execution of malicious code.

Technical Details of CVE-2021-46773

Vulnerability Description

The vulnerability arises from insufficient input validation in ABL, providing an opportunity for attackers to corrupt ASP memory, posing risks of integrity compromise and code execution.

Affected Systems and Versions

Ryzen™ 2000 series Desktop Processors “Raven Ridge” AM4
Ryzen™ 2000 Series Desktop Processors “Pinnacle Ridge”
Ryzen™ 3000 Series Desktop Processors “Matisse” AM4
AMD Ryzen™ 5000 Series Desktop Processors “Vermeer” AM4
Ryzen™ 5000 Series Desktop processor with Radeon™ Graphics “Cezanne” AM4
3rd Gen AMD Ryzen™ Threadripper™ Processors “Castle Peak” HEDT
Ryzen™ Threadripper™ PRO Processors “Castle Peak” WS
Ryzen™ Threadripper™ PRO Processors “Chagall” WS
Ryzen™ 2000 Series Mobile Processors “Raven Ridge” FP5
Ryzen™ 3000 Series Mobile Processors with Radeon™ Graphics “Renoir”
Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics “Lucienne”
Ryzen™ 5000 Series Mobile processors with Radeon™ Graphics “Cezanne”

Exploitation Mechanism

The vulnerability can be exploited by a privileged attacker through insufficient input validation in ABL, allowing them to corrupt ASP memory, potentially leading to integrity loss or code execution.

Mitigation and Prevention

Immediate Steps to Take

Apply security patches provided by AMD promptly.
Monitor AMD's security advisories and updates for any further instructions.

Long-Term Security Practices

Implement robust input validation mechanisms in software development processes.
Regularly update software and firmware to mitigate potential vulnerabilities.
Conduct security training for developers to enhance awareness of secure coding practices.

Patching and Updates

To address CVE-2021-46773, it is crucial to install the patches released by AMD to secure the affected systems and prevent potential exploitation.