CVE-2020-27951
📋 TL;DR
CVE-2020-27951 is a vulnerability in Apple operating systems that allows unauthorized code execution, potentially leading to authentication policy violations. This affects users of iOS, iPadOS, and watchOS who haven't updated to patched versions.
💻 Affected Systems
- iOS
- iPadOS
- watchOS
📦 What is this software?
Ipados by Apple
Watchos by Apple
Watchos by Apple
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attacker to execute arbitrary code, bypass authentication controls, and access sensitive data.
Likely Case
Limited code execution in sandboxed context, potentially allowing privilege escalation or data exfiltration.
If Mitigated
No impact if patched; minimal risk with proper network segmentation and device management controls.
🎯 Exploit Status
Exploitation likely requires some user interaction or specific conditions. No public exploit code available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: iOS 12.5, iOS 14.3, iPadOS 14.3, watchOS 6.3, watchOS 7.2
Vendor Advisory: https://support.apple.com/en-us/HT212003
Restart Required: Yes
Instructions:
1. Open Settings app. 2. Go to General > Software Update. 3. Install available update. 4. Restart device when prompted.
🔧 Temporary Workarounds
Network Segmentation
allIsolate vulnerable devices from critical networks and internet access
MDM Policy Enforcement
allUse Mobile Device Management to enforce update policies and restrict vulnerable devices
🧯 If You Can't Patch
- Isolate affected devices from corporate networks and sensitive data
- Implement strict application whitelisting and network access controls
🔍 How to Verify
Check if Vulnerable:
Check Settings > General > About > Version. If version is earlier than iOS 12.5, iOS 14.3, iPadOS 14.3, watchOS 6.3, or watchOS 7.2, device is vulnerable.Check Version:
Settings > General > About > Version (iOS/iPadOS) or Settings > General > About (watchOS)Verify Fix Applied:
Verify version is iOS 12.5 or later, iOS 14.3 or later, iPadOS 14.3 or later, watchOS 6.3 or later, or watchOS 7.2 or later.📡 Detection & Monitoring
Log Indicators:
- Unexpected process execution
- Authentication policy violations
- System integrity alerts
Network Indicators:
- Unusual outbound connections from Apple devices
- Anomalous authentication attempts
SIEM Query:
device.vendor:"Apple" AND device.version:"<12.5" OR device.version:"<14.3" OR device.version:"<6.3" OR device.version:"<7.2"🔗 References
- https://support.apple.com/en-us/HT212003
- https://support.apple.com/en-us/HT212004
- https://support.apple.com/en-us/HT212006
- https://support.apple.com/en-us/HT212009
- https://support.apple.com/en-us/HT212003
- https://support.apple.com/en-us/HT212004
- https://support.apple.com/en-us/HT212006
- https://support.apple.com/en-us/HT212009
