CVE-2023-1694
📋 TL;DR
CVE-2023-1694 is a file privilege escalation vulnerability in the Settings module of Huawei HarmonyOS and EMUI systems. Successful exploitation could allow attackers to gain unauthorized access to sensitive files, potentially compromising confidentiality. This affects Huawei smartphones and tablets running vulnerable versions of HarmonyOS and EMUI.
💻 Affected Systems
- Huawei smartphones
- Huawei tablets
📦 What is this software?
Emui by Huawei
Emui by Huawei
Harmonyos by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Attackers could access sensitive system files, user data, or configuration files, leading to complete device compromise and data exfiltration.
Likely Case
Local attackers with limited privileges could escalate to access protected files containing personal information or system configurations.
If Mitigated
With proper security updates applied, the vulnerability is eliminated with no residual risk.
🎯 Exploit Status
Exploitation requires local access to the device. No public exploit code has been identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: HarmonyOS 3.1.0.205 or later, EMUI 13.0.0.205 or later
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2023/4/
Restart Required: Yes
Instructions:
1. Go to Settings > System & updates > Software update. 2. Check for updates. 3. Download and install the latest security update. 4. Restart the device when prompted.
🔧 Temporary Workarounds
Restrict app permissions
allLimit which apps have access to system settings and file permissions
Disable unnecessary system components
allDisable or restrict access to Settings module for untrusted apps
🧯 If You Can't Patch
- Isolate affected devices from sensitive networks and data
- Implement strict app installation policies and only install from trusted sources
🔍 How to Verify
Check if Vulnerable:
Check device settings: Settings > About phone > HarmonyOS version or EMUI version. If version is below 3.1.0.205 (HarmonyOS) or 13.0.0.205 (EMUI), device is vulnerable.Check Version:
Settings > About phone > HarmonyOS version or EMUI versionVerify Fix Applied:
After update, verify version is 3.1.0.205 or higher for HarmonyOS, or 13.0.0.205 or higher for EMUI.📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns in system logs
- Unauthorized attempts to access Settings module
Network Indicators:
- Not applicable - local vulnerability
SIEM Query:
Not applicable for mobile device logs without enterprise mobile management integration🔗 References
- https://consumer.huawei.com/en/support/bulletin/2023/4/
- https://device.harmonyos.com/en/docs/security/update/security-bulletins-202304-0000001506528486
- https://consumer.huawei.com/en/support/bulletin/2023/4/
- https://device.harmonyos.com/en/docs/security/update/security-bulletins-202304-0000001506528486
