CVE-2024-27830
📋 TL;DR
This vulnerability allows malicious webpages to fingerprint users by exploiting improper state management in Apple's WebKit browser engine. It affects users of Apple devices and software with vulnerable versions of Safari and WebKit-based browsers. The issue enables tracking and identification of users across different browsing sessions.
💻 Affected Systems
- Safari
- tvOS
- visionOS
- iOS
- iPadOS
- watchOS
- macOS
📦 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
Persistent user tracking across sessions, enabling targeted attacks, privacy violations, and potential correlation with other user data for profiling.
Likely Case
User fingerprinting for advertising tracking, privacy erosion, and limited data collection by malicious websites.
If Mitigated
Minimal impact with updated software; basic privacy protections remain intact.
🎯 Exploit Status
Exploitation requires user to visit a malicious webpage; no authentication needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: tvOS 17.5, visionOS 1.2, Safari 17.5, iOS 17.5, iPadOS 17.5, watchOS 10.5, macOS Sonoma 14.5
Vendor Advisory: https://support.apple.com/en-us/HT214101
Restart Required: Yes
Instructions:
1. Open Settings/System Preferences. 2. Navigate to Software Update. 3. Download and install the latest update for your device. 4. Restart the device after installation.
🔧 Temporary Workarounds
Use alternative browser
allTemporarily use non-WebKit browsers like Firefox or Chrome on macOS/iOS to avoid the vulnerability.
Disable JavaScript
allDisable JavaScript in Safari settings to prevent webpage fingerprinting techniques.
🧯 If You Can't Patch
- Use browser extensions that block fingerprinting techniques
- Implement network filtering to block known malicious domains
🔍 How to Verify
Check if Vulnerable:
Check Safari/System version against affected versions list.Check Version:
On macOS: sw_vers; On iOS/iPadOS: Settings > General > About; Safari: Safari > About SafariVerify Fix Applied:
Verify device is running patched versions: tvOS ≥17.5, visionOS ≥1.2, Safari ≥17.5, iOS/iPadOS ≥17.5, watchOS ≥10.5, macOS ≥Sonoma 14.5.📡 Detection & Monitoring
Log Indicators:
- Unusual JavaScript execution patterns in browser logs
- Multiple fingerprinting API calls from single sessions
Network Indicators:
- Connections to known fingerprinting domains
- Unusual WebSocket/HTTP requests for browser feature detection
SIEM Query:
source="browser_logs" AND (event="fingerprinting" OR js_function="getClientRects" OR js_function="measureText")🔗 References
- http://seclists.org/fulldisclosure/2024/Jun/5
- https://support.apple.com/en-us/HT214101
- https://support.apple.com/en-us/HT214102
- https://support.apple.com/en-us/HT214103
- https://support.apple.com/en-us/HT214104
- https://support.apple.com/en-us/HT214106
- https://support.apple.com/en-us/HT214108
- http://seclists.org/fulldisclosure/2024/Jun/5
- https://support.apple.com/en-us/HT214101
- https://support.apple.com/en-us/HT214102
- https://support.apple.com/en-us/HT214103
- https://support.apple.com/en-us/HT214104
- https://support.apple.com/en-us/HT214106
- https://support.apple.com/en-us/HT214108
- https://support.apple.com/kb/HT214102
- https://support.apple.com/kb/HT214104
- https://support.apple.com/kb/HT214106
- https://support.apple.com/kb/HT214108
