CVE-2021-37016
📋 TL;DR
This CVE-2021-37016 is an out-of-bounds read vulnerability in Huawei smartphones that allows attackers to read memory beyond allocated buffers. Successful exploitation can lead to information disclosure or denial of service. Affected users include Huawei smartphone owners running vulnerable HarmonyOS versions.
💻 Affected Systems
- Huawei Smartphones
📦 What is this software?
Harmonyos by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise through memory corruption leading to arbitrary code execution, though the CWE-125 typically limits to read operations.
Likely Case
Information disclosure of sensitive data from device memory or application crashes causing denial of service.
If Mitigated
Limited impact with proper memory protections and exploit mitigations in place.
🎯 Exploit Status
Out-of-bounds read vulnerabilities typically require some level of attacker interaction but can be exploited without authentication in certain contexts.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: August 2021 security patch for HarmonyOS
Vendor Advisory: https://device.harmonyos.com/cn/docs/security/update/security-bulletins-202108-0000001180965965
Restart Required: Yes
Instructions:
1. Navigate to Settings > System & updates > Software update on your Huawei device. 2. Check for and install the August 2021 security update. 3. Restart the device after installation completes.
🔧 Temporary Workarounds
Disable unnecessary applications
allReduce attack surface by disabling or uninstalling applications that might trigger the vulnerability
🧯 If You Can't Patch
- Isolate affected devices from untrusted networks and limit network exposure
- Implement strict application control policies to prevent execution of untrusted code
🔍 How to Verify
Check if Vulnerable:
Check HarmonyOS version in Settings > About phone > HarmonyOS version. If version predates August 2021 security patch, device is vulnerable.Check Version:
Not applicable - check via device settings interfaceVerify Fix Applied:
Verify HarmonyOS version shows August 2021 or later security patch level in Settings > About phone > HarmonyOS version.📡 Detection & Monitoring
Log Indicators:
- Application crashes with memory access violation errors
- Unexpected process terminations in system logs
Network Indicators:
- Unusual network traffic patterns from affected devices
- Attempts to exploit memory vulnerabilities
SIEM Query:
Not specifically available - monitor for system crash logs and abnormal application behavior