CVE-2023-46773
📋 TL;DR
This CVE-2023-46773 is a permission management vulnerability in Huawei's PMS (Package Management Service) module that allows local attackers to escalate privileges on affected devices. The vulnerability affects Huawei smartphones and tablets running HarmonyOS. Successful exploitation could give attackers elevated system permissions.
💻 Affected Systems
- Huawei smartphones
- Huawei tablets
📦 What is this software?
Emui by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise with root/system-level access, allowing data theft, persistence installation, and bypassing of all security controls.
Likely Case
Local privilege escalation enabling installation of malicious apps, data access, and bypassing app sandbox restrictions.
If Mitigated
Limited impact if proper app isolation and least privilege principles are enforced, though privilege escalation would still be possible.
🎯 Exploit Status
Requires local access to the device; no public exploit code available as per references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: December 2023 security patches for HarmonyOS
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2023/12/
Restart Required: Yes
Instructions:
1. Check for system updates in device settings. 2. Install December 2023 security patch. 3. Restart device after installation.
🔧 Temporary Workarounds
Restrict physical access
allLimit physical access to devices to prevent local exploitation
Disable developer options
allTurn off USB debugging and developer options to reduce attack surface
🧯 If You Can't Patch
- Isolate affected devices from sensitive networks and data
- Implement strict access controls and monitoring for device usage
🔍 How to Verify
Check if Vulnerable:
Check HarmonyOS version in Settings > About phone > HarmonyOS versionCheck Version:
Not applicable - check via device settings UIVerify Fix Applied:
Verify December 2023 security patch is installed in Settings > System & updates > Software update📡 Detection & Monitoring
Log Indicators:
- Unusual privilege escalation attempts in system logs
- Suspicious package installation activities
Network Indicators:
- Not applicable - local vulnerability
SIEM Query:
Not applicable for typical mobile device management🔗 References
- https://consumer.huawei.com/en/support/bulletin/2023/12/
- https://device.harmonyos.com/en/docs/security/update/security-bulletins-202312-0000001758430245
- https://consumer.huawei.com/en/support/bulletin/2023/12/
- https://device.harmonyos.com/en/docs/security/update/security-bulletins-202312-0000001758430245
