CVE-2025-43321
📋 TL;DR
This vulnerability allows unsigned applications to launch on Intel-based Mac computers, potentially enabling malicious apps to access protected user data. It affects macOS systems before specific security updates. Users running vulnerable macOS versions on Intel Macs are at risk.
💻 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 →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
An attacker could execute arbitrary unsigned malicious code that bypasses macOS security controls, leading to full system compromise and data exfiltration.
Likely Case
Malicious applications could gain unauthorized access to sensitive user data protected by macOS security mechanisms.
If Mitigated
With proper patching, the vulnerability is eliminated by enforcing code signing requirements for all launched services.
🎯 Exploit Status
Requires user interaction to launch malicious application; exploitation depends on bypassing user security warnings.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: macOS Sonoma 14.8 or macOS Sequoia 15.7
Vendor Advisory: https://support.apple.com/en-us/125111
Restart Required: No
Instructions:
1. Open System Settings 2. Go to General > Software Update 3. Install available updates 4. Verify installation completes successfully
🔧 Temporary Workarounds
Enable Gatekeeper Strict Mode
macOSConfigure macOS to only allow apps from the App Store and identified developers
sudo spctl --master-enable
sudo spctl --enable --label "Mac App Store"
sudo spctl --enable --label "Developer ID"
🧯 If You Can't Patch
- Restrict user privileges to prevent installation of unsigned applications
- Implement application allowlisting to control which applications can execute
🔍 How to Verify
Check if Vulnerable:
Check macOS version and processor type: 1. Click Apple menu > About This Mac 2. If processor is Intel and macOS version is below Sonoma 14.8 or Sequoia 15.7, system is vulnerableCheck Version:
sw_versVerify Fix Applied:
Verify macOS version is Sonoma 14.8 or Sequoia 15.7 or later in About This Mac📡 Detection & Monitoring
Log Indicators:
- Console logs showing unsigned service launches
- Security logs with code signing violations
Network Indicators:
- Unusual outbound connections from unsigned processes
SIEM Query:
process where (parent_process_name contains "launchd" OR parent_process_name contains "kernel") AND code_sign_status != "valid"