CVE-2021-30845 : What You Need to Know
Learn about CVE-2021-30845, a macOS vulnerability in versions less than 11.6, enabling local users to read kernel memory. Take immediate steps to update to macOS Big Sur 11.6 for enhanced security.
A local user may be able to read kernel memory due to an out-of-bounds read vulnerability in macOS Big Sur versions less than 11.6. This vulnerability has been addressed with improved bounds checking.
Understanding CVE-2021-30845
This CVE record details a security issue in macOS that could allow a local user to access kernel memory through an out-of-bounds read exploit.
What is CVE-2021-30845?
CVE-2021-30845 is a vulnerability in macOS versions below 11.6 that enables a local user to read kernel memory, potentially leading to unauthorized access to sensitive information.
The Impact of CVE-2021-30845
The vulnerability poses a risk of exposing critical system data to unauthorized users, allowing them to potentially execute further attacks by leveraging the information obtained from the kernel memory.
Technical Details of CVE-2021-30845
This section provides an overview of the vulnerability, the affected systems, and how the exploitation occurs.
Vulnerability Description
The flaw in macOS Big Sur versions less than 11.6 allows a local user to conduct an out-of-bounds read attack, leading to potential access to kernel memory.
Affected Systems and Versions
macOS versions below 11.6 are impacted by this vulnerability, with systems running on Big Sur being particularly susceptible.
Exploitation Mechanism
By exploiting this vulnerability, a local user can bypass security measures and gain unauthorized read access to sensitive kernel memory data.
Mitigation and Prevention
To safeguard systems from CVE-2021-30845, immediate steps and long-term security practices are crucial.
Immediate Steps to Take
Users are advised to update their macOS systems to version 11.6 or higher to mitigate the risk of unauthorized access to kernel memory.
Long-Term Security Practices
Implementing robust security protocols, practicing least privilege access, and ensuring regular security updates can enhance overall system defense against similar vulnerabilities.
Patching and Updates
Regularly applying security patches and staying updated with the latest software versions is essential in addressing known vulnerabilities and strengthening system security.