CVE-2022-32896: Apple macOS Information Disclosure Flaw

CVE-2022-32896 Overview

CVE-2022-32896 is an information disclosure vulnerability in Apple macOS that allows a local user to view sensitive user information. The vulnerability exists due to the lack of hardened runtime protections, which can be exploited by authenticated attackers to access confidential data that should otherwise be protected by macOS security mechanisms.

Critical Impact

Local attackers with low privileges can exploit this vulnerability to access sensitive user information, potentially compromising user privacy and data confidentiality on affected macOS systems.

Affected Products

• Apple macOS Big Sur versions prior to 11.7
• Apple macOS Monterey versions prior to 12.6

Discovery Timeline

• 2023-02-27 - CVE CVE-2022-32896 published to NVD
• 2025-03-12 - Last updated in NVD database

Technical Details for CVE-2022-32896

Vulnerability Analysis

This vulnerability stems from an information exposure weakness (CWE-200) in macOS where the absence of hardened runtime protections allows unauthorized access to sensitive user information. The hardened runtime is a security feature in macOS that restricts certain runtime behaviors and capabilities of applications, including preventing code injection, limiting access to protected resources, and enforcing stricter memory protections.

Without hardened runtime enabled, applications may be able to bypass certain security controls and access data that would normally be protected. This vulnerability requires local access and low-level privileges, meaning an attacker would need some form of access to the target system before exploitation is possible.

Root Cause

The root cause of this vulnerability is the absence of hardened runtime protections in certain macOS components. Hardened runtime is a macOS security feature that prevents code injection, disables dynamic linker environment variables, and enforces stricter library validation. When these protections are not enabled, applications become susceptible to techniques that could expose sensitive user data.

Attack Vector

The attack vector for CVE-2022-32896 is local, requiring the attacker to have some level of access to the target macOS system. Exploitation does not require user interaction, making it particularly concerning in shared computing environments or when combined with other vulnerabilities that provide initial access.

An attacker with local access and low privileges can potentially leverage the missing hardened runtime protections to access sensitive user information stored on the system. This could include personal files, application data, credentials, or other confidential information that should be protected by macOS security mechanisms.

Detection Methods for CVE-2022-32896

Indicators of Compromise

• Unusual process activity attempting to access protected user data directories
• Applications running without expected hardened runtime entitlements
• Unexpected access to sensitive user information by low-privilege processes
• Anomalous system call patterns indicating attempts to bypass security controls

Detection Strategies

• Monitor for processes accessing sensitive user data outside of expected application contexts
• Implement file integrity monitoring on critical user data directories
• Use endpoint detection solutions to identify unauthorized data access attempts
• Review system logs for suspicious process behaviors and privilege usage patterns

Monitoring Recommendations

• Enable macOS Unified Logging to capture detailed system activity
• Configure alerts for unauthorized access to protected user directories
• Monitor for applications lacking proper code signing and hardened runtime entitlements
• Implement behavioral analysis to detect anomalous data access patterns

How to Mitigate CVE-2022-32896

Immediate Actions Required

• Update macOS Big Sur systems to version 11.7 or later immediately
• Update macOS Monterey systems to version 12.6 or later immediately
• Review systems for signs of potential exploitation before patching
• Limit local access to macOS systems to authorized users only

Patch Information

Apple has addressed this vulnerability by enabling hardened runtime protections in the affected components. Security updates are available through the following Apple Security Advisories:

• Apple Security Update HT213443 - macOS Monterey 12.6
• Apple Security Update HT213444 - macOS Big Sur 11.7

Users and administrators should apply these updates through System Preferences > Software Update or via enterprise software management tools.

Workarounds

• Restrict local system access to trusted users until patches can be applied
• Implement additional access controls on sensitive user data directories
• Use application whitelisting to prevent unauthorized applications from running
• Monitor systems closely for suspicious activity targeting user data

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

# Verify system is running patched version
# macOS Monterey should be 12.6 or later
# macOS Big Sur should be 11.7 or later