CVE-2021-1921 Explained : Impact and Mitigation
Explore the details of CVE-2021-1921, a high-severity memory corruption vulnerability impacting Qualcomm products. Learn about the impact, affected systems, and mitigation steps.
This article provides an in-depth look at CVE-2021-1921, a vulnerability affecting multiple Qualcomm products, leading to potential memory corruption.
Understanding CVE-2021-1921
CVE-2021-1921 involves improper handling of hypervisor unmap operations, resulting in possible memory corruption across a range of Qualcomm products.
What is CVE-2021-1921?
The vulnerability stems from concurrent memory operations in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, and other Qualcomm product lines, posing a significant risk of memory corruption.
The Impact of CVE-2021-1921
With a CVSS base score of 7.8, this high-severity vulnerability can lead to confidentiality, integrity, and availability breaches. Attackers could exploit this issue to manipulate critical system memory.
Technical Details of CVE-2021-1921
This section delves into the specifics of the vulnerability regarding affected systems, versions, and exploitation mechanisms.
Vulnerability Description
CVE-2021-1921 highlights a time-of-check time-of-use race condition in the kernel, enabling attackers to alter memory contents during critical system operations.
Affected Systems and Versions
The vulnerability impacts a wide range of Qualcomm products, including Snapdragon Auto, Snapdragon Compute, and Snapdragon Mobile, across various versions such as SD855, SD870, SD888 5G, and more.
Exploitation Mechanism
Attackers can exploit this vulnerability via local access, with low complexity required. They can compromise system integrity and availability through malicious memory operations.
Mitigation and Prevention
Learn how to protect your systems and data from CVE-2021-1921 through immediate steps and long-term security practices.
Immediate Steps to Take
To mitigate the risk, users should apply patches promptly, restrict system access, and monitor memory operations for suspicious activities.
Long-Term Security Practices
Implement secure coding practices, conduct regular security audits, and educate personnel on the importance of secure memory management to prevent similar vulnerabilities.
Patching and Updates
Stay informed about security bulletins from Qualcomm and apply patches as soon as they are released to safeguard your systems against CVE-2021-1921.