CVE-2025-43194: Apple macOS Privilege Escalation Flaw

CVE-2025-43194 Overview

CVE-2025-43194 is an improper access control vulnerability affecting multiple versions of Apple macOS that allows malicious applications to modify protected parts of the file system. Apple addressed this security flaw with improved validation checks across macOS Sequoia 15.6, macOS Sonoma 14.7.7, and macOS Ventura 13.7.7.

This vulnerability stems from insufficient access control mechanisms (CWE-284) that fail to properly restrict application access to protected system areas. An attacker could exploit this flaw to bypass macOS security boundaries, potentially compromising system integrity by modifying protected file system components.

Critical Impact

Successful exploitation allows unauthorized modification of protected file system areas, potentially enabling persistence mechanisms, privilege escalation, or system compromise on affected macOS systems.

Affected Products

• Apple macOS Sequoia (versions prior to 15.6)
• Apple macOS Sonoma (versions prior to 14.7.7)
• Apple macOS Ventura (versions prior to 13.7.7)

Discovery Timeline

• 2025-07-30 - CVE-2025-43194 published to NVD
• 2025-11-03 - Last updated in NVD database

Technical Details for CVE-2025-43194

Vulnerability Analysis

CVE-2025-43194 represents an improper access control vulnerability (CWE-284) within Apple macOS that enables applications to bypass intended security restrictions and modify protected parts of the file system. The flaw exists in the access control mechanisms that are designed to prevent unauthorized modifications to system-critical areas.

macOS employs System Integrity Protection (SIP) and various access control lists (ACLs) to protect sensitive system directories and files from unauthorized modifications. This vulnerability indicates a breakdown in these protective mechanisms, allowing a malicious or compromised application to circumvent these restrictions.

The network-based attack vector suggests that the vulnerable functionality may be accessible remotely or that a remotely-delivered malicious application could trigger the vulnerability without requiring user interaction or elevated privileges.

Root Cause

The root cause is improper access control (CWE-284) within macOS file system access validation routines. The insufficient checks failed to properly validate whether an application had legitimate authorization to access and modify protected file system regions. Apple addressed this by implementing improved checks in the affected code paths.

Attack Vector

This vulnerability can be exploited through a malicious application running on the target macOS system. The attack flow involves:

1. Delivery: An attacker delivers a malicious application to the target system through various means (phishing, drive-by download, compromised software distribution)
2. Execution: The victim executes the malicious application
3. Bypass: The application exploits the improper access control to bypass file system protections
4. Modification: Protected file system areas are modified, potentially enabling persistence, privilege escalation, or further system compromise

The vulnerability requires no user interaction or special privileges beyond the ability to execute an application, making exploitation relatively straightforward once the malicious application reaches the target system.

Detection Methods for CVE-2025-43194

Indicators of Compromise

• Unexpected modifications to protected macOS system directories (e.g., /System, /Library, /usr)
• Applications attempting to write to SIP-protected locations
• File system integrity check failures on protected system files
• Unusual process activity from applications targeting protected directories

Detection Strategies

• Monitor file system audit logs for write operations targeting protected system directories
• Implement file integrity monitoring (FIM) on critical macOS system paths
• Review application sandbox escape attempts and violations
• Deploy endpoint detection solutions capable of identifying unauthorized file system access patterns

Monitoring Recommendations

• Enable and centralize macOS Unified Logging for file system events
• Configure alerts for modifications to system-critical paths and protected volumes
• Implement real-time monitoring for applications exhibiting suspicious file system behavior
• Review installed applications for unusual permissions or entitlements

How to Mitigate CVE-2025-43194

Immediate Actions Required

• Update macOS Sequoia to version 15.6 or later
• Update macOS Sonoma to version 14.7.7 or later
• Update macOS Ventura to version 13.7.7 or later
• Ensure System Integrity Protection (SIP) remains enabled
• Review and restrict application installation sources to trusted origins

Patch Information

Apple has released security patches addressing CVE-2025-43194 across three macOS versions. Detailed information is available in the following security advisories:

• Apple Support Advisory #124149 - macOS Sequoia 15.6
• Apple Support Advisory #124150 - macOS Sonoma 14.7.7
• Apple Support Advisory #124151 - macOS Ventura 13.7.7

Additional technical details are available in the Full Disclosure security posts (Post #32, Post #33, Post #34).

Workarounds

• Restrict application installations to only those from the Mac App Store or identified developers
• Enable Gatekeeper to prevent execution of unsigned applications
• Implement strict endpoint security policies limiting application execution permissions
• Conduct security audits of installed third-party applications

# Verify System Integrity Protection status
csrutil status

# Check macOS version to confirm patch installation
sw_vers

# Review Gatekeeper settings
spctl --status