CVE-2021-1002
📋 TL;DR
This CVE describes an out-of-bounds read vulnerability in Android's WT_Interpolate function that could allow remote attackers to read sensitive memory without user interaction. It affects Android 12 devices, potentially exposing information from vulnerable systems. The vulnerability requires no additional privileges for exploitation.
💻 Affected Systems
- Android
📦 What is this software?
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Remote attacker could read sensitive memory contents including passwords, encryption keys, or other confidential data from affected Android devices.
Likely Case
Information disclosure of process memory, potentially revealing device-specific data or application information.
If Mitigated
With proper patching, no impact as the vulnerability is addressed in updated Android versions.
🎯 Exploit Status
No user interaction required, but exploitation requires triggering the vulnerable WT_Interpolate function.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android Security Bulletin December 2021 patches
Vendor Advisory: https://source.android.com/security/bulletin/pixel/2021-12-01
Restart Required: Yes
Instructions:
1. Check for Android system updates in Settings > System > System update. 2. Install the December 2021 Android security patch. 3. Reboot device after installation.
🔧 Temporary Workarounds
Disable vulnerable audio processing
androidIf possible, disable or restrict audio processing features that use the WT_Interpolate function
🧯 If You Can't Patch
- Isolate affected devices from untrusted networks
- Implement network segmentation to limit exposure
🔍 How to Verify
Check if Vulnerable:
Check Android version in Settings > About phone > Android version. If it shows Android 12 without December 2021 security patches, device is vulnerable.Check Version:
adb shell getprop ro.build.version.release && adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify Android version shows Android 12 with December 2021 security patch level (2021-12-05 or later).📡 Detection & Monitoring
Log Indicators:
- Unusual audio processing errors
- Memory access violations in system logs
Network Indicators:
- Suspicious network traffic to/from Android devices attempting to trigger audio processing
SIEM Query:
source="android_system_logs" AND (message="*eas_wtengine*" OR message="*WT_Interpolate*")