CVE-2023-42892
📋 TL;DR
CVE-2023-42892 is a use-after-free vulnerability in macOS that allows a local attacker to elevate their privileges. This affects macOS Monterey, Ventura, and Sonoma systems that haven't been updated to the patched versions. An attacker with local access could potentially gain root privileges on 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
Local attacker gains full root privileges, enabling complete system compromise, data theft, persistence installation, and lateral movement.
Likely Case
Local user or malware with limited privileges escalates to root/admin access to install persistent backdoors or access protected data.
If Mitigated
With proper patch management and least privilege controls, impact is limited to isolated systems with outdated software.
🎯 Exploit Status
Requires local access and some level of initial privileges. Use-after-free vulnerabilities typically require specific conditions to trigger reliably.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: macOS Monterey 12.7.2, macOS Ventura 13.6.3, macOS Sonoma 14.2
Vendor Advisory: https://support.apple.com/en-us/HT214036
Restart Required: Yes
Instructions:
1. Open System Settings 2. Click General 3. Click Software Update 4. Install available updates 5. Restart when prompted
🧯 If You Can't Patch
- Implement strict access controls to limit local user privileges
- Monitor for privilege escalation attempts using endpoint detection tools
🔍 How to Verify
Check if Vulnerable:
Check macOS version in System Settings > General > About. If version is Monterey < 12.7.2, Ventura < 13.6.3, or Sonoma < 14.2, system is vulnerable.Check Version:
sw_versVerify Fix Applied:
Verify macOS version is Monterey 12.7.2 or later, Ventura 13.6.3 or later, or Sonoma 14.2 or later.📡 Detection & Monitoring
Log Indicators:
- Unexpected privilege escalation events in system logs
- Processes running with unexpected elevated privileges
Network Indicators:
- None - this is a local privilege escalation vulnerability
SIEM Query:
source="macos_system_logs" AND (event="privilege_escalation" OR process_elevation="true")🔗 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
