CVE-2024-40854
📋 TL;DR
A memory initialization vulnerability in Apple operating systems allows malicious applications to cause system crashes (denial of service). This affects users running vulnerable versions of iOS, iPadOS, and macOS who install untrusted applications.
💻 Affected Systems
- iOS
- iPadOS
- macOS
📦 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 →⚠️ Risk & Real-World Impact
Worst Case
Complete system crash requiring reboot, potentially leading to data loss or service disruption if critical systems are affected.
Likely Case
Application-induced system crash causing temporary unavailability of affected device.
If Mitigated
Minimal impact if systems are patched and app installation is restricted to trusted sources.
🎯 Exploit Status
Exploitation requires user to install and run a malicious application. No known public exploits.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: iOS 18.1, iPadOS 18.1, iOS 17.7.1, iPadOS 17.7.1, macOS Sonoma 14.7.1, macOS Ventura 13.7.1
Vendor Advisory: https://support.apple.com/en-us/121563
Restart Required: Yes
Instructions:
1. Go to Settings > General > Software Update. 2. Download and install the latest update. 3. Restart device when prompted.
🔧 Temporary Workarounds
Restrict App Installation
allOnly allow installation from App Store and trusted developers
🧯 If You Can't Patch
- Implement strict application whitelisting policies
- Monitor for unexpected system crashes and investigate root causes
🔍 How to Verify
Check if Vulnerable:
Check Settings > General > About > Version. If version is earlier than patched versions listed above, device is vulnerable.Check Version:
iOS/iPadOS: Settings > General > About > Version. macOS: Apple menu > About This Mac > macOS versionVerify Fix Applied:
Confirm version matches or exceeds patched versions: iOS 18.1+, iPadOS 18.1+, iOS 17.7.1+, iPadOS 17.7.1+, macOS Sonoma 14.7.1+, macOS Ventura 13.7.1+📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Unexpected system restart events
- Application crash reports with memory access violations
Network Indicators:
- None (local exploitation only)
SIEM Query:
Search for event_id: 41 (Windows) or kernel panic logs on macOS/iOS devices