CVE-2022-0580
📋 TL;DR
CVE-2022-0580 is an incorrect authorization vulnerability in LibreNMS that allows authenticated users to access unauthorized functionality. This affects LibreNMS installations prior to version 22.2.0 where users can bypass intended access controls.
💻 Affected Systems
- LibreNMS
📦 What is this software?
Librenms by Librenms
⚠️ Risk & Real-World Impact
Worst Case
An authenticated attacker could gain administrative privileges, modify system configurations, access sensitive data, or execute arbitrary code.
Likely Case
Authenticated users can access functionality beyond their assigned permissions, potentially viewing or modifying data they shouldn't have access to.
If Mitigated
With proper access controls and network segmentation, impact is limited to authorized users accessing some unauthorized functions.
🎯 Exploit Status
Exploitation requires authenticated access. Public proof-of-concept exists in references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 22.2.0
Vendor Advisory: https://github.com/librenms/librenms/commit/95970af78e4c899744a715766d744deef8c505f7
Restart Required: No
Instructions:
1. Backup your LibreNMS installation and database. 2. Update to LibreNMS version 22.2.0 or later. 3. Verify the fix by checking version and testing authorization controls.
🔧 Temporary Workarounds
Restrict User Access
allTemporarily restrict user accounts to minimum necessary permissions while awaiting patch.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate LibreNMS from critical systems
- Enable detailed logging and monitoring for unauthorized access attempts
🔍 How to Verify
Check if Vulnerable:
Check LibreNMS version: if version is below 22.2.0, system is vulnerable.Check Version:
cd /opt/librenms && ./lnms --versionVerify Fix Applied:
Verify version is 22.2.0 or higher and test user authorization controls.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts in LibreNMS logs
- User accessing endpoints beyond their role permissions
Network Indicators:
- Unusual API calls from authenticated users
- Requests to administrative endpoints from non-admin users
SIEM Query:
source="librenms" AND (event_type="unauthorized_access" OR user_role_changes)🔗 References
- https://github.com/librenms/librenms/commit/95970af78e4c899744a715766d744deef8c505f7
- https://huntr.dev/bounties/2494106c-7703-4558-bb1f-1eae59d264e3
- https://notes.netbytesec.com/2022/02/multiple-vulnerabilities-in-librenms.html
- https://github.com/librenms/librenms/commit/95970af78e4c899744a715766d744deef8c505f7
- https://huntr.dev/bounties/2494106c-7703-4558-bb1f-1eae59d264e3
- https://notes.netbytesec.com/2022/02/multiple-vulnerabilities-in-librenms.html
