CVE-2025-24209
📋 TL;DR
This CVE describes a buffer overflow vulnerability in Apple's web content processing components. Attackers can cause unexpected process crashes by tricking users into visiting malicious websites. Affected users include anyone running vulnerable versions of Apple's operating systems and Safari browser.
💻 Affected Systems
- Safari
- tvOS
- iPadOS
- iOS
- macOS
📦 What is this software?
Ipados 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 →Safari by Apple
Tvos by Apple
⚠️ Risk & Real-World Impact
Worst Case
Potential arbitrary code execution leading to full system compromise if combined with other vulnerabilities or memory corruption techniques.
Likely Case
Denial of service through application or browser crashes when processing malicious web content.
If Mitigated
No impact if systems are patched or if users avoid untrusted websites.
🎯 Exploit Status
Exploitation requires user interaction (visiting malicious website) but no authentication. Buffer overflow exploitation typically requires medium technical skill.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: tvOS 18.4, Safari 18.4, iPadOS 17.7.6, iOS 18.4, iPadOS 18.4, macOS Sequoia 15.4
Vendor Advisory: https://support.apple.com/en-us/122371
Restart Required: No
Instructions:
1. Open Settings/System Preferences. 2. Navigate to Software Update. 3. Install available updates for your Apple device. 4. For Safari, update through App Store or system updates.
🔧 Temporary Workarounds
Disable JavaScript
allPrevents execution of malicious JavaScript that could trigger the buffer overflow
Safari: Safari > Settings > Security > uncheck 'Enable JavaScript'
Use Content Filtering
allBlock access to known malicious websites
Configure DNS filtering or web proxy with malicious site blocking
🧯 If You Can't Patch
- Implement network segmentation to isolate vulnerable systems
- Deploy web content filtering to block malicious websites
🔍 How to Verify
Check if Vulnerable:
Check current OS version against affected versions list. For Safari: Safari > About Safari.Check Version:
macOS: sw_vers -productVersion, iOS/iPadOS: Settings > General > About > Version, tvOS: Settings > General > About > VersionVerify Fix Applied:
Verify OS version is equal to or newer than patched versions listed in affected_systems.versions📡 Detection & Monitoring
Log Indicators:
- Application crash logs from Safari or WebKit processes
- Unexpected process termination events in system logs
Network Indicators:
- Multiple connections to suspicious domains followed by application crashes
- Unusual outbound web traffic patterns
SIEM Query:
source="system_logs" AND (process="Safari" OR process="WebKit") AND event="crash"🔗 References
- https://support.apple.com/en-us/122371
- https://support.apple.com/en-us/122372
- https://support.apple.com/en-us/122373
- https://support.apple.com/en-us/122377
- https://support.apple.com/en-us/122379
- http://seclists.org/fulldisclosure/2025/Apr/11
- http://seclists.org/fulldisclosure/2025/Apr/13
- http://seclists.org/fulldisclosure/2025/Apr/2
- http://seclists.org/fulldisclosure/2025/Apr/4
- http://seclists.org/fulldisclosure/2025/Apr/5
- http://seclists.org/fulldisclosure/2025/Apr/8
- https://lists.debian.org/debian-lts-announce/2025/06/msg00016.html
