CVE-2024-27857
📋 TL;DR
This CVE describes an out-of-bounds memory access vulnerability in multiple Apple operating systems that could allow a remote attacker to crash applications or execute arbitrary code. The vulnerability affects visionOS, macOS, tvOS, iOS, and iPadOS. Users running affected versions of these operating systems are at risk.
💻 Affected Systems
- visionOS
- macOS Sonoma
- tvOS
- iOS
- iPadOS
📦 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 →Tvos by Apple
⚠️ Risk & Real-World Impact
Worst Case
Remote attacker achieves arbitrary code execution with the privileges of the affected application, potentially leading to full system compromise.
Likely Case
Remote attacker causes application termination (denial of service) or limited code execution within sandbox constraints.
If Mitigated
With proper network segmentation and application sandboxing, impact is limited to application crash without system compromise.
🎯 Exploit Status
The CVE description indicates remote exploitation is possible, suggesting network-accessible attack vectors. No public exploit code is mentioned in the provided references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: visionOS 1.2, macOS Sonoma 14.5, tvOS 17.5, iOS 17.5, iPadOS 17.5
Vendor Advisory: https://support.apple.com/en-us/HT214101
Restart Required: Yes
Instructions:
1. Open Settings app. 2. Navigate to General > Software Update. 3. Download and install the latest available update. 4. Restart the device when prompted.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to affected devices to reduce attack surface.
Application Sandboxing
allEnsure applications run with minimal privileges to limit potential damage.
🧯 If You Can't Patch
- Isolate affected devices from untrusted networks and internet access.
- Implement strict application control policies to limit which applications can run.
🔍 How to Verify
Check if Vulnerable:
Check the operating system version in Settings > General > About on iOS/iPadOS, or System Settings > General > About on macOS.Check Version:
On macOS: sw_vers. On iOS/iPadOS: Settings > General > About > Version.Verify Fix Applied:
Verify the operating system version matches or exceeds the patched versions listed in the fix section.📡 Detection & Monitoring
Log Indicators:
- Application crash logs with memory access violation errors
- Unexpected process termination in system logs
Network Indicators:
- Unusual network connections to affected devices
- Suspicious traffic patterns targeting Apple services
SIEM Query:
source="apple_system_logs" AND (event_type="crash" OR event_type="segfault") AND process_name IN (affected_applications)🔗 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/HT214106
- https://support.apple.com/en-us/HT214108
- https://support.apple.com/kb/HT214101
- https://support.apple.com/kb/HT214102
- https://support.apple.com/kb/HT214106
- https://support.apple.com/kb/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/HT214106
- https://support.apple.com/en-us/HT214108
- https://support.apple.com/kb/HT214101
- https://support.apple.com/kb/HT214102
- https://support.apple.com/kb/HT214106
- https://support.apple.com/kb/HT214108
