CVE-2023-42848
📋 TL;DR
This vulnerability allows an attacker to cause heap corruption by tricking a user into processing a maliciously crafted image. It affects Apple devices running vulnerable versions of iOS, iPadOS, macOS, tvOS, and watchOS. Successful exploitation could lead to arbitrary code execution.
💻 Affected Systems
- iOS
- iPadOS
- macOS
- tvOS
- watchOS
📦 What is this software?
Ipad Os by Apple
Ipad Os 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
Remote code execution with the privileges of the user processing the image, potentially leading to full system compromise.
Likely Case
Application crash or denial of service when processing malicious images, with potential for code execution in targeted attacks.
If Mitigated
No impact if systems are patched or if malicious images are blocked from reaching vulnerable systems.
🎯 Exploit Status
Exploitation requires user interaction to process a malicious image. No public exploit code is known at this time.
🛠️ 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. Go to Settings > General > Software Update on iOS/iPadOS/watchOS/tvOS. 2. Install the latest available update. 3. For macOS, go to System Settings > General > Software Update. 4. Install the latest available update. 5. Restart the device after installation.
🔧 Temporary Workarounds
Block untrusted image sources
allPrevent processing of images from untrusted sources such as unknown websites, emails, or messages.
🧯 If You Can't Patch
- Implement network filtering to block malicious image files at the perimeter.
- Educate users to avoid opening images from untrusted sources and to use updated applications for image processing.
🔍 How to Verify
Check if Vulnerable:
Check the device's operating system version against the affected versions listed above.Check Version:
iOS/iPadOS: Settings > General > About > Version. macOS: Apple menu > About This Mac > macOS version. tvOS: Settings > General > About > Version. watchOS: Watch app on iPhone > General > About > Version.Verify Fix Applied:
Verify that the device is running one of the patched versions: iOS 16.7.2+, iPadOS 16.7.2+, iOS 17.1+, iPadOS 17.1+, macOS Ventura 13.6.1+, macOS Sonoma 14.1+, tvOS 17.1+, watchOS 10.1+.📡 Detection & Monitoring
Log Indicators:
- Application crashes related to image processing libraries
- Unexpected memory access violations in system logs
Network Indicators:
- Unusual image file downloads from untrusted sources
- Spike in image processing requests
SIEM Query:
Search for events where image processing applications crash unexpectedly or show memory corruption errors.🔗 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
