CVE-2020-9820
📋 TL;DR
This CVE describes a logic issue in iOS/iPadOS that allows a remote attacker to modify the file system. The vulnerability affects Apple mobile devices running versions before iOS 13.5 and iPadOS 13.5, potentially enabling unauthorized file system access.
💻 Affected Systems
- iPhone
- iPad
📦 What is this software?
Ipados by Apple
⚠️ Risk & Real-World Impact
Worst Case
Remote attacker gains full file system access, potentially installing malware, stealing sensitive data, or bricking the device.
Likely Case
Attacker modifies specific files to bypass security controls or install surveillance tools.
If Mitigated
With proper network segmentation and device management, impact limited to isolated devices.
🎯 Exploit Status
Apple's description suggests remote exploitation is possible, though specific details are limited.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: iOS 13.5, iPadOS 13.5
Vendor Advisory: https://support.apple.com/HT211168
Restart Required: Yes
Instructions:
1. Open Settings app. 2. Tap General > Software Update. 3. Download and install iOS 13.5 or iPadOS 13.5. 4. Restart device when prompted.
🔧 Temporary Workarounds
Disable unnecessary network services
allReduce attack surface by disabling unused network features
🧯 If You Can't Patch
- Isolate affected devices from untrusted networks
- Implement strict network access controls and monitoring
🔍 How to Verify
Check if Vulnerable:
Check iOS/iPadOS version in Settings > General > About. If version is below 13.5, device is vulnerable.Check Version:
Not applicable - check via device settings UIVerify Fix Applied:
Verify version shows 13.5 or higher in Settings > General > About.📡 Detection & Monitoring
Log Indicators:
- Unexpected file system modifications
- Unusual network connections to device
Network Indicators:
- Suspicious traffic to iOS/iPadOS services
SIEM Query:
Not applicable - device-level logging required