CVE-2024-32991
📋 TL;DR
A permission verification vulnerability in the wpa_supplicant module allows attackers to bypass security controls and disrupt Wi-Fi connectivity. This affects Huawei devices running HarmonyOS with vulnerable wpa_supplicant versions. The vulnerability primarily impacts availability of Wi-Fi services.
💻 Affected Systems
- Huawei smartphones
- Huawei tablets
- Huawei devices with HarmonyOS
📦 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
Harmonyos by Huawei
Harmonyos by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Complete denial of Wi-Fi service on affected devices, preventing network connectivity and disrupting device functionality that depends on wireless communication.
Likely Case
Intermittent Wi-Fi disconnections or inability to connect to wireless networks, causing service disruption for users.
If Mitigated
Minimal impact with proper network segmentation and updated systems, though some service degradation may occur.
🎯 Exploit Status
Exploitation requires local access or ability to send crafted packets to the wpa_supplicant process. No public exploit code available as of current knowledge.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: HarmonyOS security updates from May 2024 onward
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2024/5/
Restart Required: Yes
Instructions:
1. Check for system updates in device Settings > System & updates > Software update. 2. Download and install available security updates. 3. Restart device after installation completes.
🔧 Temporary Workarounds
Disable Wi-Fi when not in use
allTurn off Wi-Fi functionality to prevent exploitation of the wpa_supplicant vulnerability
Use wired connections
allSwitch to Ethernet or cellular data instead of Wi-Fi to avoid the vulnerable component
🧯 If You Can't Patch
- Segment network to isolate vulnerable devices from critical systems
- Implement network monitoring for unusual Wi-Fi disconnection patterns
🔍 How to Verify
Check if Vulnerable:
Check HarmonyOS version in Settings > About phone > HarmonyOS version. If before May 2024 security update, device is vulnerable.Check Version:
Settings > About phone > HarmonyOS version (no CLI command available on consumer devices)Verify Fix Applied:
Verify HarmonyOS version includes May 2024 or later security patches in Settings > About phone > HarmonyOS version.📡 Detection & Monitoring
Log Indicators:
- Unexpected wpa_supplicant crashes
- Multiple Wi-Fi authentication failures
- Abnormal Wi-Fi disconnection events
Network Indicators:
- Sudden loss of Wi-Fi connectivity across multiple devices
- Unusual broadcast/multicast traffic on Wi-Fi networks
SIEM Query:
source="device_logs" AND (process="wpa_supplicant" AND event="crash") OR (interface="wlan*" AND status="disconnected" AND reason="unexpected")🔗 References
- https://consumer.huawei.com/en/support/bulletin/2024/5/
- https://device.harmonyos.com/cn/docs/security/update/security-bulletins-phones-202405-0000001902628049
- https://consumer.huawei.com/en/support/bulletin/2024/5/
- https://device.harmonyos.com/cn/docs/security/update/security-bulletins-phones-202405-0000001902628049
