CVE-2023-41995
📋 TL;DR
This CVE describes a use-after-free vulnerability in Apple's iOS, iPadOS, and macOS that allows a malicious app to execute arbitrary code with kernel privileges. This gives attackers complete control over affected devices. All users running vulnerable versions of these operating systems are affected.
💻 Affected Systems
- iOS
- iPadOS
- macOS
📦 What is this software?
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 device compromise with kernel-level persistence, data theft, credential harvesting, and installation of backdoors or ransomware.
Likely Case
Malicious app gains kernel privileges to bypass security controls, access sensitive data, and maintain persistence on the device.
If Mitigated
With proper app vetting and security controls, exploitation requires user interaction to install malicious apps, reducing widespread impact.
🎯 Exploit Status
Exploitation requires a malicious app to be installed and executed on the target device. No public exploit code is available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: iOS 17, iPadOS 17, macOS Sonoma 14
Vendor Advisory: https://support.apple.com/en-us/HT213938
Restart Required: Yes
Instructions:
1. Open Settings app. 2. Go to General > Software Update. 3. Download and install iOS 17/iPadOS 17/macOS Sonoma 14. 4. Restart device when prompted.
🔧 Temporary Workarounds
Restrict App Installation
allOnly allow installation of apps from trusted sources like the App Store
Enable Lockdown Mode
allApple's extreme protection mode that blocks certain features and connections
🧯 If You Can't Patch
- Isolate vulnerable devices from critical networks and data
- Implement strict application allowlisting and mobile device management controls
🔍 How to Verify
Check if Vulnerable:
Check device OS version in Settings > General > About on iOS/iPadOS or Apple menu > About This Mac on macOSCheck Version:
iOS/iPadOS: Settings > General > About > Version; macOS: sw_vers or System Settings > General > AboutVerify Fix Applied:
Verify OS version is iOS 17+, iPadOS 17+, or macOS Sonoma 14+📡 Detection & Monitoring
Log Indicators:
- Unexpected kernel extensions or drivers loading
- Processes running with unexpected kernel privileges
- System integrity protection (SIP) violations
Network Indicators:
- Unusual outbound connections from system processes
- DNS requests to suspicious domains from kernel processes
SIEM Query:
process_name:kernel AND parent_process:launchd AND cmdline:*suspicious* OR event_type:privilege_escalation AND target_process:kernel🔗 References
- http://seclists.org/fulldisclosure/2023/Oct/3
- http://seclists.org/fulldisclosure/2023/Oct/8
- https://support.apple.com/en-us/HT213938
- https://support.apple.com/en-us/HT213940
- https://support.apple.com/kb/HT213841
- http://seclists.org/fulldisclosure/2023/Oct/3
- http://seclists.org/fulldisclosure/2023/Oct/8
- https://support.apple.com/en-us/HT213938
- https://support.apple.com/en-us/HT213940
- https://support.apple.com/kb/HT213841
- https://support.apple.com/kb/HT213938
- https://support.apple.com/kb/HT213940
