CVE-2023-23536
📋 TL;DR
This is a kernel privilege escalation vulnerability in Apple operating systems where an application can bypass bounds checks to execute arbitrary code with kernel privileges. Affects macOS, iOS, iPadOS, tvOS, and watchOS users running vulnerable versions. Successful exploitation gives attackers complete control over the affected device.
💻 Affected Systems
- macOS
- iOS
- iPadOS
- tvOS
- watchOS
📦 What is this software?
Ipados by Apple
Ipados by Apple
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
Complete system compromise with kernel-level persistence, data theft, credential harvesting, and installation of rootkits or backdoors.
Likely Case
Malicious apps from untrusted sources gaining full system access to steal sensitive data, monitor user activity, or install additional malware.
If Mitigated
Limited impact due to app sandboxing and code signing requirements, though determined attackers could bypass these protections.
🎯 Exploit Status
Requires user to install and run a malicious application. No authentication bypass needed beyond convincing user to install app.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: macOS Ventura 13.3, iOS 16.4, iPadOS 16.4, macOS Big Sur 11.7.5, iOS 15.7.4, iPadOS 15.7.4, macOS Monterey 12.6.4, tvOS 16.4, watchOS 9.4
Vendor Advisory: https://support.apple.com/en-us/HT213670
Restart Required: Yes
Instructions:
1. Open System Settings/Preferences 2. Go to General > Software Update 3. Install available updates 4. Restart device when prompted
🔧 Temporary Workarounds
Restrict App Installation Sources
allConfigure devices to only allow app installation from trusted sources like App Store
For macOS: System Settings > Privacy & Security > Allow apps downloaded from: App Store
For iOS/iPadOS: Settings > General > Device Management > App Restrictions
🧯 If You Can't Patch
- Implement strict application allowlisting policies
- Deploy endpoint detection and response (EDR) solutions to monitor for suspicious kernel activity
🔍 How to Verify
Check if Vulnerable:
Check current OS version against vulnerable versions listed in affected_systems.versionsCheck Version:
macOS: sw_vers -productVersion, iOS/iPadOS: Settings > General > About > Version, tvOS: Settings > General > About > Version, watchOS: Watch app on iPhone > General > About > VersionVerify Fix Applied:
Verify OS version is equal to or newer than patch_version listed above📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Unexpected kernel extensions loading
- Processes running with root privileges from user apps
Network Indicators:
- Unusual outbound connections from system processes
- DNS queries to known malicious domains from kernel context
SIEM Query:
source="apple_system_logs" AND (event="kernel_panic" OR process="kernel_task" AND action="unexpected_behavior")🔗 References
- https://support.apple.com/en-us/HT213670
- https://support.apple.com/en-us/HT213673
- https://support.apple.com/en-us/HT213674
- https://support.apple.com/en-us/HT213675
- https://support.apple.com/en-us/HT213676
- https://support.apple.com/en-us/HT213677
- https://support.apple.com/en-us/HT213678
- https://support.apple.com/en-us/HT213670
- https://support.apple.com/en-us/HT213673
- https://support.apple.com/en-us/HT213674
- https://support.apple.com/en-us/HT213675
- https://support.apple.com/en-us/HT213676
- https://support.apple.com/en-us/HT213677
- https://support.apple.com/en-us/HT213678
