CVE-2023-3116
📋 TL;DR
This vulnerability in OpenHarmony allows a local attacker to access confidential information or modify sensitive files due to incorrect default permissions. It affects OpenHarmony v3.2.2 and prior versions, potentially compromising system integrity and confidentiality for users of these versions.
💻 Affected Systems
- OpenHarmony
📦 What is this software?
Openharmony by Openatom
⚠️ Risk & Real-World Impact
Worst Case
An attacker gains unauthorized access to sensitive data or modifies critical system files, leading to data theft, system compromise, or denial of service.
Likely Case
Local users exploit weak permissions to read or alter files they shouldn't have access to, resulting in information disclosure or minor system disruptions.
If Mitigated
With proper access controls and patching, the risk is minimized to low, preventing unauthorized file access and maintaining system security.
🎯 Exploit Status
Exploitation requires local access but is straightforward due to the permissions issue; no public proof-of-concept has been disclosed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: OpenHarmony v3.2.3 or later
Vendor Advisory: https://gitee.com/openharmony/security/blob/master/zh/security-disclosure/2023/2023-12.md
Restart Required: Yes
Instructions:
1. Check current OpenHarmony version. 2. Update to v3.2.3 or later via official channels. 3. Restart the system to apply changes.
🔧 Temporary Workarounds
Manual Permission Adjustment
linuxReview and tighten file permissions on sensitive directories and files to restrict access to authorized users only.
chmod 600 /path/to/sensitive/file
chown root:root /path/to/sensitive/file
🧯 If You Can't Patch
- Implement strict access controls and least privilege principles for local users.
- Monitor file access logs for unauthorized activities and isolate affected systems from critical networks.
🔍 How to Verify
Check if Vulnerable:
Check the OpenHarmony version; if it is v3.2.2 or earlier, the system is vulnerable.Check Version:
uname -a or check system settings for OpenHarmony versionVerify Fix Applied:
After updating, confirm the version is v3.2.3 or later and test file permissions on sensitive paths.📡 Detection & Monitoring
Log Indicators:
- Unusual file access or modification events in system logs, especially by non-privileged users.
Network Indicators:
- Not applicable as this is a local vulnerability.
SIEM Query:
Search for events where file permissions are changed or sensitive files are accessed by unexpected users.