CVE-2023-49246
📋 TL;DR
This CVE describes an unauthorized access vulnerability in Huawei's card management module, allowing attackers to bypass authentication and access sensitive card-related data. It affects Huawei devices running HarmonyOS, potentially compromising service confidentiality. The vulnerability stems from improper authorization (CWE-863) in the card management system.
💻 Affected Systems
- Huawei devices with card management module
📦 What is this software?
Emui by Huawei
Emui by Huawei
Emui by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain unauthorized access to all card management data, potentially exposing sensitive user information, financial details, or system credentials stored in the module.
Likely Case
Limited unauthorized access to card data, potentially exposing user information or system configuration details that could be used for further attacks.
If Mitigated
No access to card management data; authentication controls prevent exploitation even if the vulnerability exists.
🎯 Exploit Status
Exploitation requires understanding of the card management module's authorization mechanisms; no public exploit details available
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: December 2023 security updates
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2023/12/
Restart Required: Yes
Instructions:
1. Check for available updates in device settings. 2. Apply December 2023 security updates. 3. Restart device after update completion.
🔧 Temporary Workarounds
Disable card management module
allTemporarily disable or restrict access to the vulnerable card management module if not essential
Network segmentation
allIsolate affected devices from sensitive networks to limit potential data exposure
🧯 If You Can't Patch
- Implement strict network access controls to limit who can access devices with the vulnerable module
- Monitor card management module access logs for unauthorized activity and implement alerting
🔍 How to Verify
Check if Vulnerable:
Check device security patch level in settings; if before December 2023, device is likely vulnerableCheck Version:
Check in device settings under 'About phone' > 'Software information' for security patch levelVerify Fix Applied:
Verify security patch level shows December 2023 or later updates installed📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to card management APIs
- Unusual card data access patterns
- Failed authentication events followed by successful card access
Network Indicators:
- Unusual traffic to card management service ports
- Requests bypassing normal authentication flows
SIEM Query:
source="device_logs" AND (event="card_access" OR api="/card/*") AND user="unknown" OR auth_status="bypassed"🔗 References
- https://consumer.huawei.com/en/support/bulletin/2023/12/
- https://https://device.harmonyos.com/en/docs/security/update/security-bulletins-202312-0000001758430245
- https://consumer.huawei.com/en/support/bulletin/2023/12/
- https://https://device.harmonyos.com/en/docs/security/update/security-bulletins-202312-0000001758430245
