CVE-2023-51838
📋 TL;DR
MeshCentral 1.1.16 uses weak cryptographic algorithms that could allow attackers to decrypt sensitive data or bypass authentication. This affects all users running the vulnerable version of MeshCentral, a remote management tool. The vulnerability stems from improper use of cryptography in the software.
💻 Affected Systems
- Ylianst MeshCentral
📦 What is this software?
Meshcentral by Meshcentral
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of encrypted communications, allowing attackers to intercept and decrypt sensitive remote management data, potentially leading to full system takeover.
Likely Case
Attackers decrypting session data or authentication tokens to gain unauthorized access to managed systems.
If Mitigated
Limited impact if strong network segmentation and additional authentication layers are in place.
🎯 Exploit Status
Exploitation requires network access to MeshCentral but detailed analysis is publicly available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.1.17 or later
Vendor Advisory: https://github.com/Ylianst/MeshCentral
Restart Required: Yes
Instructions:
1. Backup current MeshCentral installation. 2. Update to MeshCentral 1.1.17 or later via npm update. 3. Restart MeshCentral service.
🔧 Temporary Workarounds
Disable vulnerable endpoints
allTemporarily disable MeshCentral remote management features until patched
systemctl stop meshcentral
Disable MeshCentral service
🧯 If You Can't Patch
- Implement strict network segmentation to isolate MeshCentral from critical systems
- Enable additional authentication layers and monitor for unusual access patterns
🔍 How to Verify
Check if Vulnerable:
Check MeshCentral version in web interface or via 'npm list meshcentral' commandCheck Version:
npm list meshcentral | grep meshcentralVerify Fix Applied:
Verify version is 1.1.17 or later and test cryptographic functionality📡 Detection & Monitoring
Log Indicators:
- Unusual authentication patterns
- Multiple failed cryptographic operations
Network Indicators:
- Unexpected traffic to MeshCentral ports
- Suspicious cryptographic handshake patterns
SIEM Query:
source="meshcentral" AND (event="authentication_failure" OR event="crypto_error")🔗 References
- https://github.com/Ylianst/MeshCentral/tree/master
- https://github.com/tianjk99/Cryptographic-Misuses/blob/main/Bug_MeshCentral.md
- https://github.com/tianjk99/Cryptographic-Misuses/blob/main/CVE-2023-51838.md
- https://github.com/Ylianst/MeshCentral/tree/master
- https://github.com/tianjk99/Cryptographic-Misuses/blob/main/Bug_MeshCentral.md
- https://github.com/tianjk99/Cryptographic-Misuses/blob/main/CVE-2023-51838.md
