CVE-2021-30856 Explained : Impact and Mitigation
Learn about CVE-2021-30856 affecting macOS systems prior to 11.3, now fixed in macOS Big Sur 11.3. Understand the impact, technical details, and mitigation steps.
This CVE-2021-30856 affects macOS systems with versions less than 11.3. It was addressed by Apple by introducing a new Remote Login option to opt into Full Disk Access for Secure Shell sessions. The vulnerability allowed a malicious unsandboxed app to bypass Privacy preferences when Remote Login is enabled.
Understanding CVE-2021-30856
This section will provide an overview of the CVE-2021-30856 vulnerability and its impact on macOS systems.
What is CVE-2021-30856?
CVE-2021-30856 is a security vulnerability found in macOS systems prior to version 11.3. It allowed a malicious app to bypass Privacy preferences when Remote Login is enabled.
The Impact of CVE-2021-30856
The impact of this vulnerability is the potential privacy breach caused by a malicious unsandboxed app gaining unauthorized access on systems with Remote Login enabled.
Technical Details of CVE-2021-30856
In this section, we will delve into the technical aspects of the CVE-2021-30856 vulnerability.
Vulnerability Description
The vulnerability allows a malicious unsandboxed app to bypass Privacy preferences on macOS systems with Remote Login enabled.
Affected Systems and Versions
macOS systems with versions lower than 11.3 are affected by this vulnerability.
Exploitation Mechanism
The exploitation involves leveraging Remote Login to gain unauthorized access and bypass Privacy preferences.
Mitigation and Prevention
To safeguard your system against CVE-2021-30856, follow the mitigation and prevention measures outlined below.
Immediate Steps to Take
Update your macOS system to version 11.3 or later to address this vulnerability. Additionally, exercise caution when granting permissions to apps.
Long-Term Security Practices
Regularly update your system, practice safe browsing habits, and be mindful of the permissions granted to applications to enhance overall security.
Patching and Updates
Stay informed about security patches released by Apple and promptly install updates to ensure your system is protected against known vulnerabilities.