CVE-2025-27131
📋 TL;DR
This CVE describes an improper input validation vulnerability in OpenHarmony that allows a local attacker to cause a denial of service (DoS) condition. The vulnerability affects OpenHarmony v5.0.3 and earlier versions. Attackers with local access can exploit this to crash or degrade system functionality.
💻 Affected Systems
- OpenHarmony
📦 What is this software?
Openharmony by Openatom
⚠️ Risk & Real-World Impact
Worst Case
Complete system unavailability or persistent service disruption requiring physical intervention to restore functionality.
Likely Case
Temporary service interruption affecting specific components or applications until system restart.
If Mitigated
Minimal impact with proper input validation and system hardening in place.
🎯 Exploit Status
Exploitation requires local access to the system. The CWE-20 classification suggests improper input validation that could be triggered with crafted inputs.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: OpenHarmony v5.0.4 or later
Vendor Advisory: https://gitee.com/openharmony/security/blob/master/zh/security-disclosure/2025/2025-06.md
Restart Required: Yes
Instructions:
1. Check current OpenHarmony version. 2. Update to OpenHarmony v5.0.4 or later. 3. Reboot the system to apply the update. 4. Verify the update was successful.
🔧 Temporary Workarounds
Restrict local user access
allLimit local user privileges and access to minimize attack surface
# Review and restrict user permissions using appropriate OpenHarmony security policies
Implement input validation
allAdd additional input validation layers for critical system components
# Implement custom input validation for vulnerable components if source access is available
🧯 If You Can't Patch
- Implement strict access controls to limit local user privileges
- Monitor system logs for unusual local activity or repeated crash events
🔍 How to Verify
Check if Vulnerable:
Check OpenHarmony version: 'getprop ro.build.version.ohos' or similar system command. If version is 5.0.3 or earlier, system is vulnerable.Check Version:
getprop ro.build.version.ohosVerify Fix Applied:
After updating, verify version is 5.0.4 or later using the same version check command.📡 Detection & Monitoring
Log Indicators:
- Unexpected system crashes
- Service termination events
- Abnormal process exits
- Kernel panic logs
Network Indicators:
- N/A - This is a local attack vector
SIEM Query:
Search for: 'process crash', 'service terminated unexpectedly', 'kernel panic' in system logs