CVE-2023-46757
📋 TL;DR
This vulnerability in Huawei's remote PIN module involves incorrect information storage locations that could expose sensitive data. It affects Huawei devices running HarmonyOS, potentially allowing attackers to access confidential information stored in memory. The vulnerability impacts confidentiality but doesn't allow code execution or privilege escalation.
💻 Affected Systems
- Huawei devices with remote PIN functionality
📦 What is this software?
Harmonyos by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Sensitive PIN-related data could be exposed to unauthorized parties, potentially compromising user authentication security and privacy.
Likely Case
Limited exposure of non-critical memory contents or metadata, with PIN data potentially being accessible under specific conditions.
If Mitigated
Minimal impact with proper memory isolation and access controls preventing unauthorized data access.
🎯 Exploit Status
Exploitation likely requires local access or malicious application installation; no public exploit details available
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Security updates released in November 2023
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2023/11/
Restart Required: Yes
Instructions:
1. Check for available updates in device settings 2. Install the latest security update 3. Restart device after installation
🔧 Temporary Workarounds
Disable remote PIN functionality
allTemporarily disable remote PIN features if not required
Restrict app permissions
allReview and restrict application permissions to minimize attack surface
🧯 If You Can't Patch
- Isolate affected devices from untrusted networks
- Implement strict access controls and monitor for suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check device security patch level in settings; if before November 2023 updates, likely vulnerableCheck Version:
Check device settings > About phone > HarmonyOS version and security patch levelVerify Fix Applied:
Verify security patch level includes November 2023 updates in device settings📡 Detection & Monitoring
Log Indicators:
- Unusual memory access patterns
- Failed authentication attempts
- Security service crashes
Network Indicators:
- Unusual local service communications
- Unexpected inter-process communication
SIEM Query:
Device logs showing security service anomalies or memory access violations🔗 References
- https://consumer.huawei.com/en/support/bulletin/2023/11/
- https://device.harmonyos.com/en/docs/security/update/security-bulletins-202311-0000001729189597
- https://consumer.huawei.com/en/support/bulletin/2023/11/
- https://device.harmonyos.com/en/docs/security/update/security-bulletins-202311-0000001729189597
