CVE-2022-22583: Apple macOS Information Disclosure Flaw

CVE-2022-22583 Overview

CVE-2022-22583 is a permissions validation vulnerability affecting Apple macOS and Mac OS X operating systems. The flaw stems from improper validation of permissions, which allows a malicious application to bypass security controls and access restricted files on the system. This vulnerability enables unauthorized access to sensitive data that should be protected by the operating system's access control mechanisms.

Critical Impact

A malicious application running on an affected macOS system can bypass file permission restrictions to read confidential files, potentially exposing sensitive user data, credentials, or other protected information.

Affected Products

• Apple macOS Monterey (versions prior to 12.2)
• Apple macOS Big Sur (versions prior to 11.6.3)
• Apple Mac OS X 10.15.7 Catalina (prior to Security Update 2022-001)

Discovery Timeline

• 2022-03-18 - CVE-2022-22583 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2022-22583

Vulnerability Analysis

This vulnerability exists in the permissions validation mechanism within Apple's macOS operating system. The flaw allows applications to circumvent the standard file access controls that protect restricted system and user files. When exploited, an attacker with local access can craft or deploy a malicious application that leverages this permissions issue to read files that would otherwise be inaccessible due to macOS security restrictions.

The vulnerability requires local access to the target system and low privileges to exploit, meaning an attacker would need to either have user-level access to the machine or trick a user into running a malicious application. While the impact is limited to confidentiality (unauthorized file access), this could lead to exposure of sensitive information including configuration files, cached credentials, or other protected data.

Root Cause

The root cause of CVE-2022-22583 is insufficient validation of permissions when applications request access to file system resources. The macOS permission checking mechanism failed to properly verify that an application had legitimate authorization to access certain restricted files. This validation gap allowed applications to bypass the intended access control boundaries and read files that should have been protected.

Attack Vector

The attack requires local access to exploit, meaning an attacker must either have physical access to the target macOS system, remote access through another vulnerability, or convince a user to execute a malicious application. The attack flow typically involves:

1. An attacker develops or obtains a malicious application designed to exploit the permissions validation flaw
2. The application is executed on a vulnerable macOS system with standard user privileges
3. The malicious application exploits the validation weakness to access restricted files
4. Sensitive data from protected files is exfiltrated or used for further attacks

The vulnerability does not provide the ability to modify files or disrupt system availability, but the potential for information disclosure can serve as a stepping stone for additional attacks, such as credential theft leading to privilege escalation.

Detection Methods for CVE-2022-22583

Indicators of Compromise

• Unusual file access patterns from applications attempting to read files outside their expected scope
• Applications accessing protected system files in /Library, /System, or user-specific protected directories
• Unexpected file read operations detected in system audit logs from non-privileged applications
• Processes exhibiting abnormal behavior attempting to enumerate or access restricted file paths

Detection Strategies

• Enable and monitor macOS Unified Logging for file access events from untrusted applications
• Deploy endpoint detection and response (EDR) solutions to monitor application file access behavior
• Implement file integrity monitoring on sensitive directories to detect unauthorized access attempts
• Review fs_usage or similar tools to identify applications with unusual file access patterns

Monitoring Recommendations

• Configure centralized logging to capture file access events from all macOS endpoints
• Set up alerts for applications accessing files in restricted directories without proper entitlements
• Monitor for newly installed or unsigned applications that attempt to access protected resources
• Establish baseline application behavior profiles to detect anomalous file access activities

How to Mitigate CVE-2022-22583

Immediate Actions Required

• Update macOS Monterey to version 12.2 or later immediately
• Update macOS Big Sur to version 11.6.3 or later on all affected systems
• Apply Security Update 2022-001 for macOS Catalina 10.15.7
• Audit installed applications for any potentially malicious software that could exploit this vulnerability
• Restrict user ability to install unsigned applications using Gatekeeper settings

Patch Information

Apple has released security updates to address CVE-2022-22583 with improved permissions validation. The following updates should be applied:

• macOS Monterey 12.2: Available through System Preferences > Software Update. See Apple Support Document HT213054 for details.
• macOS Big Sur 11.6.3: Available through System Preferences > Software Update. See Apple Support Document HT213055 for details.
• Security Update 2022-001 Catalina: For macOS Catalina 10.15.7 systems. See Apple Support Document HT213056 for details.

Workarounds

• Restrict application installations to App Store and identified developers only via System Preferences > Security & Privacy
• Enable full disk access logging and review logs for suspicious application behavior
• Implement application whitelisting to prevent execution of unauthorized applications
• Consider temporarily restricting user permissions on highly sensitive systems until patches can be applied

# Check current macOS version to verify patch status
sw_vers -productVersion

# Enable application restrictions via command line (requires admin)
sudo spctl --master-enable

# View recent file system access events for analysis
log show --predicate 'subsystem == "com.apple.sandbox"' --last 24h