CVE-2023-21010
📋 TL;DR
This CVE describes an out-of-bounds read vulnerability in Android's p2p_iface.cpp that could allow local information disclosure. It affects Android 13 devices and requires System execution privileges for exploitation, but no user interaction. The vulnerability could expose sensitive memory contents to local attackers.
💻 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 of adjacent memory regions, potentially exposing non-critical system data or application information.
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 March 2023.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android Security Patch Level March 2023 or later
Vendor Advisory: https://source.android.com/security/bulletin/pixel/2023-03-01
Restart Required: Yes
Instructions:
1. Check for system updates in Settings > System > System update. 2. Install March 2023 or later security patch. 3. Reboot device after installation.
🔧 Temporary Workarounds
Restrict System Privileges
androidLimit applications and users with System execution privileges through SELinux policies and app permissions.
adb shell setenforce 1
adb shell getenforce
🧯 If You Can't Patch
- Implement strict SELinux policies to limit System privilege access
- Monitor for suspicious privilege escalation attempts and memory access patterns
🔍 How to Verify
Check if Vulnerable:
Check Android version and security patch level: Settings > About phone > Android version and Security patch levelCheck Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify security patch level is March 2023 or later: Settings > About phone > Security patch level📡 Detection & Monitoring
Log Indicators:
- SELinux denials for p2p_iface access
- System privilege escalation attempts
- Abnormal memory access patterns in system logs
Network Indicators:
- None - local vulnerability only
SIEM Query:
source="android_system" AND (event="SELINUX_DENIAL" AND process="p2p_iface") OR (event="PRIVILEGE_ESCALATION" AND target="system")