CVE-2023-23516
📋 TL;DR
This is a memory corruption vulnerability in macOS that allows an application to execute arbitrary code with kernel privileges. It affects macOS Big Sur, Monterey, and Ventura before specific patch versions. Successful exploitation gives attackers complete system control.
💻 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
Full system compromise with kernel-level persistence, data theft, and complete control over affected Mac systems.
Likely Case
Malicious applications gaining kernel privileges to bypass security controls, install malware, or access protected data.
If Mitigated
Limited impact if systems are patched, applications are from trusted sources, and security controls like Gatekeeper are enabled.
🎯 Exploit Status
Exploitation requires a malicious application to be executed on the target system. No public exploit code is known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: macOS Big Sur 11.7.3, macOS Monterey 12.6.3, macOS Ventura 13.2
Vendor Advisory: https://support.apple.com/en-us/HT213603
Restart Required: Yes
Instructions:
1. Open System Settings > General > Software Update. 2. Install available updates. 3. Restart when prompted.
🔧 Temporary Workarounds
Restrict application sources
allConfigure Gatekeeper to only allow apps from the App Store and identified developers
sudo spctl --master-enable
sudo spctl --enable
🧯 If You Can't Patch
- Restrict user privileges and implement application allowlisting
- Monitor for suspicious process creation and kernel module loading
🔍 How to Verify
Check if Vulnerable:
Check macOS version in System Settings > General > AboutCheck Version:
sw_versVerify Fix Applied:
Verify macOS version is 11.7.3 or higher (Big Sur), 12.6.3 or higher (Monterey), or 13.2 or higher (Ventura)📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Unexpected process privilege escalation
- Suspicious kernel extension loading
Network Indicators:
- Unusual outbound connections from system processes
SIEM Query:
process where parent_process_name contains "kernel" and process_name not in (expected_kernel_processes)