CVE-2020-27893 : Security Advisory and Response

An issue existed in screen sharing in macOS, allowing a user to view another user's screen. This issue has been fixed in macOS Big Sur 11.0.1.

Understanding CVE-2020-27893

This CVE addresses a vulnerability in screen sharing on macOS.

What is CVE-2020-27893?

CVE-2020-27893 is a security vulnerability in macOS that could allow a user with screen sharing access to view another user's screen.

The Impact of CVE-2020-27893

The vulnerability could lead to unauthorized access to sensitive information displayed on a user's screen.

Technical Details of CVE-2020-27893

This section provides technical details of the CVE.

Vulnerability Description

The issue in screen sharing was due to inadequate state management, which could be exploited by a user with screen sharing access.

Affected Systems and Versions

Affected Product: macOS
Vendor: Apple
Affected Versions: Less than 11.0

Exploitation Mechanism

A user with screen sharing access could exploit the vulnerability to view another user's screen.

Mitigation and Prevention

Protect your system from CVE-2020-27893 with these steps.

Immediate Steps to Take

Update macOS to version 11.0.1 or later to fix the vulnerability.
Limit screen sharing access to trusted users only.

Long-Term Security Practices

Regularly update your operating system and applications to patch security vulnerabilities.
Implement network segmentation to restrict access to sensitive systems.

Patching and Updates

Ensure timely installation of security updates provided by Apple to address known vulnerabilities.