CVE-2024-28200
📋 TL;DR
CVE-2024-28200 is an authentication bypass vulnerability in N-central server that allows attackers to access the user interface without valid credentials. This affects all N-central deployments prior to version 2024.2. The vulnerability was discovered internally and hasn't been observed exploited in the wild.
💻 Affected Systems
- N-able N-central
📦 What is this software?
N Central by N Able
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the N-central management system, allowing attackers to manage all connected endpoints, deploy malware, exfiltrate sensitive data, and pivot to other network resources.
Likely Case
Unauthorized access to the management interface leading to configuration changes, data theft, and potential lateral movement to managed systems.
If Mitigated
Limited impact if proper network segmentation and access controls prevent external access to the N-central interface.
🎯 Exploit Status
No public exploit available. The vulnerability was discovered through source code review and hasn't been observed exploited.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2024.2
Vendor Advisory: https://me.n-able.com/s/security-advisory/aArVy0000000673KAA/cve202428200-ncentral-authentication-bypass
Restart Required: Yes
Instructions:
1. Backup current N-central configuration and data. 2. Download N-central 2024.2 from N-able portal. 3. Run the upgrade installer following vendor documentation. 4. Verify successful upgrade and test functionality.
🔧 Temporary Workarounds
Network Access Restriction
allRestrict access to N-central interface to trusted IP addresses only
Multi-factor Authentication Enforcement
allEnable MFA for all administrative accounts to add additional authentication layer
🧯 If You Can't Patch
- Implement strict network segmentation to isolate N-central server from untrusted networks
- Enable comprehensive logging and monitoring for authentication attempts and interface access
🔍 How to Verify
Check if Vulnerable:
Check N-central version in administration interface. If version is below 2024.2, system is vulnerable.Check Version:
Check version in N-central web interface under Help > About or via administrative consoleVerify Fix Applied:
Verify N-central version shows 2024.2 or higher in administration interface.📡 Detection & Monitoring
Log Indicators:
- Failed authentication attempts followed by successful access without valid credentials
- Access from unexpected IP addresses to administrative endpoints
- Authentication bypass patterns in web server logs
Network Indicators:
- Unusual traffic patterns to N-central authentication endpoints
- Access to administrative interfaces without preceding authentication requests
SIEM Query:
source="n-central-logs" AND (event_type="authentication" AND result="success" AND NOT (user="*" AND auth_method="password"))🔗 References
- https://documentation.n-able.com/N-central/Release_Notes/GA/Content/2024.2%20Release%20Notes.htm
- https://me.n-able.com/s/security-advisory/aArVy0000000673KAA/cve202428200-ncentral-authentication-bypass
- https://documentation.n-able.com/N-central/Release_Notes/GA/Content/2024.2%20Release%20Notes.htm
- https://me.n-able.com/s/security-advisory/aArVy0000000673KAA/cve202428200-ncentral-authentication-bypass
