CVE-2020-0273
📋 TL;DR
This vulnerability in Android's hwservicemanager allows local privilege escalation through an out-of-bounds write caused by freeing a wild pointer. Attackers can gain elevated privileges without user interaction or additional execution permissions. Only Android 11 devices are affected.
💻 Affected Systems
- Android
📦 What is this software?
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise with root-level access, allowing installation of persistent malware, data theft, and bypassing all security controls.
Likely Case
Local attacker gains elevated system privileges to access sensitive data, modify system settings, or install malicious applications.
If Mitigated
Limited impact with proper security updates applied and device isolation from untrusted users.
🎯 Exploit Status
Requires local access to device but no user interaction. Exploitation involves memory corruption techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android Security Patch Level 2020-09-01 or later
Vendor Advisory: https://source.android.com/security/bulletin/android-11
Restart Required: Yes
Instructions:
1. Check for system updates in Settings > System > Advanced > System update. 2. Install available security updates. 3. Reboot device after installation completes.
🔧 Temporary Workarounds
No effective workarounds
allMemory corruption vulnerability in system component requires patching
🧯 If You Can't Patch
- Isolate device from untrusted users and applications
- Implement strict application whitelisting and disable unknown sources
🔍 How to Verify
Check if Vulnerable:
Check Settings > About phone > Android version = 11 AND Settings > About phone > Android security patch level < 2020-09-01Check Version:
adb shell getprop ro.build.version.release && adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify Settings > About phone > Android security patch level shows 2020-09-01 or later date📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- hwservicemanager crash dumps
- unexpected privilege escalation attempts
Network Indicators:
- None - local exploit only
SIEM Query:
Search for process crashes involving hwservicemanager or unexpected root/superuser access events