CVE-2025-43517
📋 TL;DR
This CVE describes a macOS privacy vulnerability where applications could access protected user data through insufficient log redaction. It affects macOS Tahoe, Sequoia, and Sonoma users who haven't applied security updates. The issue allows unauthorized access to sensitive information that should be protected.
💻 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
Malicious applications could exfiltrate sensitive user data including credentials, personal information, or protected system data through improperly redacted logs.
Likely Case
Applications with legitimate access to logs could inadvertently or intentionally view protected user data that should have been redacted.
If Mitigated
With proper application sandboxing and security controls, the impact is limited to data that specific applications are already authorized to access.
🎯 Exploit Status
Exploitation requires a malicious or compromised application to be installed and executed on the target system. No public exploit code is currently known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: macOS Tahoe 26.2, macOS Sequoia 15.7.3, macOS Sonoma 14.8.3
Vendor Advisory: https://support.apple.com/en-us/125886
Restart Required: Yes
Instructions:
1. Open System Settings > General > Software Update. 2. Install available updates. 3. Restart your Mac when prompted.
🔧 Temporary Workarounds
Application Sandboxing Enforcement
allEnforce strict application sandboxing policies to limit what applications can access.
Log Access Restriction
linuxRestrict application access to system logs through permissions and access controls.
sudo chmod 640 /var/log/*.log
sudo chown root:wheel /var/log/*.log
🧯 If You Can't Patch
- Implement strict application allowlisting to prevent unauthorized applications from running
- Enable full disk encryption and monitor for unusual application behavior accessing log files
🔍 How to Verify
Check if Vulnerable:
Check macOS version: if running Tahoe < 26.2, Sequoia < 15.7.3, or Sonoma < 14.8.3, the system is vulnerable.Check Version:
sw_versVerify Fix Applied:
Verify macOS version is equal to or greater than the patched versions listed in the fix section.📡 Detection & Monitoring
Log Indicators:
- Unusual application access to system log files
- Applications reading protected log entries
Network Indicators:
- Unexpected outbound connections from applications shortly after log access
SIEM Query:
source="macos" AND (event="file_access" AND target_file="*.log") AND process_name NOT IN ("syslogd", "logd")