CVE-2024-40771
📋 TL;DR
This is a memory handling vulnerability in Apple operating systems that allows an application to execute arbitrary code with kernel privileges. Attackers could gain full system control on affected devices. All users running vulnerable versions of macOS, iOS, iPadOS, watchOS, tvOS, and visionOS are affected.
💻 Affected Systems
- macOS
- iOS
- iPadOS
- watchOS
- tvOS
- visionOS
📦 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 →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 →Tvos by Apple
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with kernel-level access, allowing attackers to install persistent malware, steal sensitive data, or create backdoors.
Likely Case
Targeted attacks against high-value individuals or organizations to gain persistent access to devices and networks.
If Mitigated
Limited impact with proper patch management and security controls in place.
🎯 Exploit Status
Requires user to install and run a malicious application. No public exploit code available at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: macOS Sonoma 14.5, iOS 16.7.8, iPadOS 16.7.8, iOS 17.5, iPadOS 17.5, macOS Monterey 12.7.5, watchOS 10.5, tvOS 17.5, macOS Ventura 13.6.7, visionOS 1.2
Vendor Advisory: https://support.apple.com/en-us/120898
Restart Required: Yes
Instructions:
1. Open Settings/System Preferences. 2. Navigate to Software Update. 3. Download and install the latest available update. 4. Restart the device when prompted.
🔧 Temporary Workarounds
Restrict App Installation
allOnly allow installation of apps from trusted sources like the App Store
🧯 If You Can't Patch
- Implement strict application allowlisting policies
- Monitor for suspicious process behavior and kernel-level activity
🔍 How to Verify
Check if Vulnerable:
Check current OS version against affected versions listCheck Version:
macOS: sw_vers -productVersion, iOS/iPadOS: Settings > General > About > VersionVerify Fix Applied:
Verify OS version matches or exceeds patched versions📡 Detection & Monitoring
Log Indicators:
- Unexpected kernel extensions loading
- Suspicious process spawning with elevated privileges
- Unusual system calls
Network Indicators:
- Unexpected outbound connections from system processes
- Command and control traffic from kernel-level processes
SIEM Query:
Process creation where parent process is kernel_task or similar system process with unusual command line arguments🔗 References
- https://support.apple.com/en-us/120898
- https://support.apple.com/en-us/120899
- https://support.apple.com/en-us/120900
- https://support.apple.com/en-us/120901
- https://support.apple.com/en-us/120902
- https://support.apple.com/en-us/120903
- https://support.apple.com/en-us/120905
- https://support.apple.com/en-us/120906
