CVE-2023-42942
📋 TL;DR
This CVE describes a privilege escalation vulnerability in Apple operating systems where improper symlink handling allows malicious applications to gain root privileges. The vulnerability affects multiple Apple platforms including iOS, iPadOS, macOS, watchOS, and tvOS. Users running affected versions are at risk of complete system compromise.
💻 Affected Systems
- iOS
- iPadOS
- macOS
- watchOS
- tvOS
📦 What is this software?
Ipad Os 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 →Tvos by Apple
Watchos by Apple
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover with root privileges, allowing installation of persistent malware, data theft, and full control over the device.
Likely Case
Malicious app gains root access, enabling data exfiltration, surveillance, and installation of additional payloads.
If Mitigated
Limited impact with proper app vetting and sandboxing, but still significant risk if malicious app bypasses initial checks.
🎯 Exploit Status
Exploitation requires user to install a malicious application. No public exploit code is currently available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: watchOS 10.1, macOS Sonoma 14.1, tvOS 17.1, iOS 16.7.2, iPadOS 16.7.2, iOS 17.1, iPadOS 17.1, macOS Ventura 13.6.1
Vendor Advisory: https://support.apple.com/en-us/HT213981
Restart Required: Yes
Instructions:
1. Open Settings app. 2. Navigate to General > Software Update. 3. Download and install the latest available update. 4. Restart device when prompted.
🔧 Temporary Workarounds
Restrict App Installation
allOnly install apps from trusted sources like the official App Store
Enable Gatekeeper
macOSOn macOS, ensure Gatekeeper is enabled to verify app signatures
sudo spctl --master-enable
🧯 If You Can't Patch
- Restrict app installation to only trusted sources and official app stores
- Implement mobile device management (MDM) policies to control app installation
🔍 How to Verify
Check if Vulnerable:
Check current OS version against affected versions listCheck Version:
iOS/iPadOS: Settings > General > About > Version. macOS: Apple menu > About This Mac > macOS version. watchOS: Watch app > General > About > Version. tvOS: Settings > General > About > Version.Verify Fix Applied:
Verify OS version matches or exceeds patched versions listed in fix_official.patch_version📡 Detection & Monitoring
Log Indicators:
- Unexpected privilege escalation events
- Processes running with unexpected root privileges
Network Indicators:
- Unusual outbound connections from system processes
SIEM Query:
process where parent_process_name contains "App" and process_name contains "sudo" or "su"🔗 References
- https://support.apple.com/en-us/HT213981
- https://support.apple.com/en-us/HT213982
- https://support.apple.com/en-us/HT213984
- https://support.apple.com/en-us/HT213985
- https://support.apple.com/en-us/HT213987
- https://support.apple.com/en-us/HT213988
- https://support.apple.com/en-us/HT213981
- https://support.apple.com/en-us/HT213982
- https://support.apple.com/en-us/HT213984
- https://support.apple.com/en-us/HT213985
- https://support.apple.com/en-us/HT213987
- https://support.apple.com/en-us/HT213988
- https://support.apple.com/kb/HT213982
- https://support.apple.com/kb/HT213984
- https://support.apple.com/kb/HT213988
