CVE-2024-40861
📋 TL;DR
This vulnerability in macOS allows malicious applications to escalate privileges and gain root access. It affects macOS systems before Sequoia 15. Any user running a vulnerable macOS version with a malicious app could be impacted.
💻 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 →⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with root-level access, allowing attackers to install persistent malware, access all user data, and control the entire system.
Likely Case
Local privilege escalation where a malicious app gains elevated privileges to perform unauthorized actions, potentially leading to data theft or further system exploitation.
If Mitigated
Limited impact with proper app vetting and security controls, though the vulnerability still presents a significant risk if exploited.
🎯 Exploit Status
Exploitation requires user interaction to run a malicious application. The vulnerability has been publicly disclosed but no public proof-of-concept is confirmed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: macOS Sequoia 15
Vendor Advisory: https://support.apple.com/en-us/121238
Restart Required: Yes
Instructions:
1. Open System Settings 2. Click General 3. Click Software Update 4. Install macOS Sequoia 15 update 5. Restart when prompted
🔧 Temporary Workarounds
Restrict Application Execution
allLimit application execution to trusted sources only through Gatekeeper and application whitelisting
sudo spctl --master-enable
sudo spctl --enable
🧯 If You Can't Patch
- Restrict user permissions and implement least privilege principles
- Use application control solutions to prevent unauthorized app execution
🔍 How to Verify
Check if Vulnerable:
Check macOS version: if version is earlier than 15.0, the system is vulnerableCheck Version:
sw_versVerify Fix Applied:
Verify macOS version is 15.0 or later and check that the update was successfully installed📡 Detection & Monitoring
Log Indicators:
- Unexpected privilege escalation events in system logs
- Applications requesting root privileges unexpectedly
- Authorization events in /var/log/system.log
Network Indicators:
- Not applicable - this is a local privilege escalation vulnerability
SIEM Query:
source="system.log" AND ("Authorization" OR "privilege" OR "root") AND NOT expected_process