CVE-2023-42931
📋 TL;DR
This vulnerability allows a process to gain administrative privileges without proper authentication on affected macOS versions. It affects macOS Ventura, Sonoma, and Monterey systems that haven't been updated to the patched versions. Attackers could exploit this to escalate privileges and gain unauthorized control over the system.
💻 Affected Systems
- macOS
📦 What is this software?
Macos by Apple
macOS is Apple's desktop and laptop operating system powering Mac computers used by millions of professionals, developers, creative professionals, and enterprise users worldwide. Built on a Unix foundation with the Darwin kernel and modern Cocoa frameworks, macOS delivers a seamless ecosystem integr...
Learn more about Macos →Macos by Apple
macOS is Apple's desktop and laptop operating system powering Mac computers used by millions of professionals, developers, creative professionals, and enterprise users worldwide. Built on a Unix foundation with the Darwin kernel and modern Cocoa frameworks, macOS delivers a seamless ecosystem integr...
Learn more about Macos →Macos by Apple
macOS is Apple's desktop and laptop operating system powering Mac computers used by millions of professionals, developers, creative professionals, and enterprise users worldwide. Built on a Unix foundation with the Darwin kernel and modern Cocoa frameworks, macOS delivers a seamless ecosystem integr...
Learn more about Macos →⚠️ Risk & Real-World Impact
Worst Case
An attacker gains full administrative control over the system, allowing them to install persistent malware, access all user data, modify system configurations, and potentially pivot to other systems on the network.
Likely Case
Local attackers or malware with initial access could escalate privileges to install additional payloads, bypass security controls, and maintain persistence on compromised systems.
If Mitigated
With proper patch management and least privilege principles, the impact is limited to systems that remain unpatched, with minimal risk if users don't have local access or if additional security controls are in place.
🎯 Exploit Status
While no public proof-of-concept exists, Apple has addressed this with improved checks, suggesting the vulnerability could be reliably exploited. Requires local access to the system.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: macOS Ventura 13.6.3, macOS Sonoma 14.2, macOS Monterey 12.7.2
Vendor Advisory: https://support.apple.com/en-us/HT214036
Restart Required: Yes
Instructions:
1. Open System Settings > General > Software Update. 2. Install available updates. 3. Restart the system when prompted. 4. Verify the update completed successfully.
🔧 Temporary Workarounds
Restrict local access
allLimit physical and remote access to vulnerable systems to reduce attack surface
Implement least privilege
allEnsure users operate with standard user privileges rather than administrative accounts for daily tasks
🧯 If You Can't Patch
- Monitor for suspicious privilege escalation attempts using security monitoring tools
- Implement application allowlisting to prevent unauthorized processes from running
🔍 How to Verify
Check if Vulnerable:
Check macOS version in System Settings > General > About. If version is Ventura <13.6.3, Sonoma <14.2, or Monterey <12.7.2, the system is vulnerable.Check Version:
sw_versVerify Fix Applied:
Verify macOS version shows Ventura 13.6.3, Sonoma 14.2, or Monterey 12.7.2 or later in System Settings > General > About.📡 Detection & Monitoring
Log Indicators:
- Unexpected privilege escalation events in system logs
- Processes running with elevated privileges without proper authentication
- Security framework authorization failures followed by successful privileged operations
Network Indicators:
- Unusual outbound connections from systems after local privilege escalation
SIEM Query:
source="macos_system_logs" AND (event_type="privilege_escalation" OR process_name="sudo" OR process_name="su") AND result="success" AND user NOT IN ["expected_admin_users"]🔗 References
- https://support.apple.com/en-us/HT214036
- https://support.apple.com/en-us/HT214037
- https://support.apple.com/en-us/HT214038
- https://support.apple.com/en-us/HT214036
- https://support.apple.com/en-us/HT214037
- https://support.apple.com/en-us/HT214038
- https://support.apple.com/kb/HT214036
- https://support.apple.com/kb/HT214037
- https://support.apple.com/kb/HT214038
