CVE-2024-0038
📋 TL;DR
This vulnerability allows local attackers to inject arbitrary input events without proper permission checks in Android's AccessibilityManagerService. It enables local privilege escalation without requiring user interaction. Affected systems include Android devices running vulnerable versions.
💻 Affected Systems
- Android
📦 What is this software?
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attacker to execute arbitrary code with elevated privileges, access sensitive data, or perform unauthorized actions.
Likely Case
Local privilege escalation allowing attackers to bypass security restrictions and perform actions they shouldn't be authorized to do.
If Mitigated
Limited impact with proper permission controls and security patches applied.
🎯 Exploit Status
Requires local access to the device but no user interaction. Exploitation involves bypassing permission checks in the AccessibilityManagerService.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: February 2024 Android Security Patch or later
Vendor Advisory: https://source.android.com/security/bulletin/2024-02-01
Restart Required: Yes
Instructions:
1. Check for Android system updates in Settings > System > System update. 2. Install the February 2024 security patch or later. 3. Restart the device after installation.
🔧 Temporary Workarounds
Disable unnecessary accessibility services
androidReduce attack surface by disabling accessibility services that aren't needed
Settings > Accessibility > Installed services > Toggle off unnecessary services
🧯 If You Can't Patch
- Restrict physical access to devices and implement strict app installation policies
- Monitor for suspicious accessibility service usage and implement application allowlisting
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level in Settings > About phone > Android version > Security patch level. If before February 2024, device is vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify security patch level shows February 2024 or later in Settings > About phone > Android version > Security patch level.📡 Detection & Monitoring
Log Indicators:
- Unusual accessibility service activations
- Permission bypass attempts in system logs
- Unexpected input event injections
Network Indicators:
- Not applicable - local vulnerability
SIEM Query:
Not applicable for network detection - focus on device logs and security events🔗 References
- https://android.googlesource.com/platform/frameworks/base/+/3e88d987235f5a2acd50a9b6bad78dbbf39cb079
- https://source.android.com/security/bulletin/2024-02-01
- https://android.googlesource.com/platform/frameworks/base/+/3e88d987235f5a2acd50a9b6bad78dbbf39cb079
- https://source.android.com/security/bulletin/2024-02-01
