CVE-2023-21012
📋 TL;DR
This CVE describes an out-of-bounds read vulnerability in Android's p2p_iface.cpp component. It allows local information disclosure when exploited with System execution privileges, affecting Android 13 devices. No user interaction is required for exploitation.
💻 Affected Systems
- Android
📦 What is this software?
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Local attacker with System privileges could read sensitive memory contents, potentially exposing cryptographic keys, authentication tokens, or other protected data.
Likely Case
Limited information disclosure from adjacent memory locations, possibly exposing non-critical system information or application data.
If Mitigated
With proper privilege separation and SELinux policies, impact is limited to specific system contexts with minimal data exposure.
🎯 Exploit Status
Exploitation requires System privileges and knowledge of memory layout. No public exploits known as of advisory publication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android Security Bulletin March 2023 patches
Vendor Advisory: https://source.android.com/security/bulletin/pixel/2023-03-01
Restart Required: Yes
Instructions:
1. Check for Android system updates in Settings > System > System update. 2. Install March 2023 security patch. 3. Reboot device after installation.
🔧 Temporary Workarounds
Restrict System Privileges
androidLimit apps with System privileges using SELinux policies and Android permissions
adb shell setenforce 1
adb shell getenforce
🧯 If You Can't Patch
- Isolate affected devices from sensitive networks and data
- Implement strict app vetting and privilege management policies
🔍 How to Verify
Check if Vulnerable:
Check Android version: Settings > About phone > Android version. If version is 13 and security patch level is before March 2023, device is vulnerable.Check Version:
adb shell getprop ro.build.version.release && adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify security patch level is March 2023 or later: Settings > About phone > Android security patch level.📡 Detection & Monitoring
Log Indicators:
- Kernel logs showing memory access violations
- SELinux denials related to p2p_iface
Network Indicators:
- No network indicators - local vulnerability only
SIEM Query:
source="android_logs" AND ("p2p_iface" OR "out of bounds" OR "memory violation")