CVE-2023-46760
📋 TL;DR
This CVE describes an out-of-bounds write vulnerability in a kernel driver module that could allow attackers to cause process exceptions or potentially execute arbitrary code. It affects Huawei devices running HarmonyOS. Successful exploitation requires local access to the vulnerable system.
💻 Affected Systems
- Huawei devices with HarmonyOS
📦 What is this software?
Emui by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Local privilege escalation leading to full system compromise, arbitrary code execution with kernel privileges, or system crashes causing denial of service.
Likely Case
Process crashes leading to denial of service, potential information disclosure, or limited privilege escalation within the affected process context.
If Mitigated
Minimal impact with proper access controls, process isolation, and security hardening in place.
🎯 Exploit Status
Exploitation requires local access and knowledge of kernel driver internals. No public exploit code has been identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: As specified in Huawei security bulletins for November 2023
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2023/11/
Restart Required: Yes
Instructions:
1. Check Huawei security bulletins for affected devices. 2. Apply the latest security updates via device settings. 3. Reboot the device after update installation.
🔧 Temporary Workarounds
Restrict local access
allLimit physical and remote local access to vulnerable devices
Disable unnecessary kernel modules
linuxIf possible, disable or blacklist the affected kernel driver module
modprobe -r <affected_module>
echo 'blacklist <affected_module>' >> /etc/modprobe.d/blacklist.conf
🧯 If You Can't Patch
- Implement strict access controls to limit who can access the device locally
- Monitor system logs for unusual process crashes or kernel panic events
🔍 How to Verify
Check if Vulnerable:
Check HarmonyOS version in device settings and compare against Huawei's security bulletinsCheck Version:
Settings > About phone > HarmonyOS versionVerify Fix Applied:
Verify the device has received and installed the November 2023 security updates📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Process crash dumps
- Unexpected system reboots
- Driver module loading errors
Network Indicators:
- No direct network indicators - this is a local vulnerability
SIEM Query:
source="kernel" AND ("panic" OR "oops" OR "segfault") AND process="kernel_module"🔗 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
