CVE-2025-43214
📋 TL;DR
This CVE describes a memory handling vulnerability in Apple's Safari browser and related WebKit components across multiple Apple operating systems. Processing malicious web content could cause Safari to crash unexpectedly. All users running affected Apple operating systems with Safari/WebKit are potentially impacted.
💻 Affected Systems
- Safari
- WebKit
📦 What is this software?
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 →Safari by Apple
Tvos by Apple
Watchos by Apple
⚠️ Risk & Real-World Impact
Worst Case
Potential arbitrary code execution leading to full system compromise if memory corruption can be weaponized beyond denial of service.
Likely Case
Denial of service through Safari crashes when visiting malicious websites.
If Mitigated
No impact if systems are patched or if malicious websites are blocked.
🎯 Exploit Status
Exploitation requires user interaction (visiting malicious website). No public exploit code is currently available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Safari 18.6, watchOS 11.6, iOS 18.6 and iPadOS 18.6, tvOS 18.6, macOS Sequoia 15.6, visionOS 2.6
Vendor Advisory: https://support.apple.com/en-us/124147
Restart Required: Yes
Instructions:
1. Open Settings/System Preferences. 2. Navigate to Software Update. 3. Install available updates for your Apple operating system. 4. Restart device when prompted.
🔧 Temporary Workarounds
Disable JavaScript
allTemporarily disable JavaScript in Safari to prevent exploitation via malicious web content.
Use Alternative Browser
allUse a non-WebKit based browser until patches are applied.
🧯 If You Can't Patch
- Implement web content filtering to block known malicious websites.
- Restrict user access to untrusted websites through proxy or firewall policies.
🔍 How to Verify
Check if Vulnerable:
Check Safari version in Safari > About Safari. Check OS version in Settings > General > About (iOS/iPadOS) or Apple menu > About This Mac (macOS).Check Version:
safari://version (macOS) or check in device settingsVerify Fix Applied:
Verify Safari version is 18.6 or higher and OS version matches patched versions listed in affected_systems.📡 Detection & Monitoring
Log Indicators:
- Safari crash logs
- WebKit process termination events
- Unexpected browser restarts
Network Indicators:
- Connections to suspicious domains followed by browser crashes
SIEM Query:
source="*safari*" AND (event="crash" OR event="terminated")🔗 References
- https://support.apple.com/en-us/124147
- https://support.apple.com/en-us/124149
- https://support.apple.com/en-us/124152
- https://support.apple.com/en-us/124153
- https://support.apple.com/en-us/124154
- https://support.apple.com/en-us/124155
- http://seclists.org/fulldisclosure/2025/Aug/0
- http://seclists.org/fulldisclosure/2025/Jul/30
- http://seclists.org/fulldisclosure/2025/Jul/32
- http://seclists.org/fulldisclosure/2025/Jul/35
- http://seclists.org/fulldisclosure/2025/Jul/36
