CVE-2023-5642
📋 TL;DR
This vulnerability allows unauthenticated remote attackers to read and write to the snmpmon.ini configuration file in Advantech R-SeeNet software. Attackers can access sensitive information or modify system configurations. Organizations using Advantech R-SeeNet v2.4.23 are affected.
💻 Affected Systems
- Advantech R-SeeNet
📦 What is this software?
R Seenet by Advantech
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through configuration manipulation leading to unauthorized access, data exfiltration, or service disruption.
Likely Case
Sensitive information disclosure including SNMP credentials and system configurations, potentially enabling further attacks.
If Mitigated
Limited impact with proper network segmentation and access controls preventing external exploitation.
🎯 Exploit Status
Tenable Research published details and exploitation methods. The attack requires no authentication and minimal technical skill.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v2.4.24 or later
Vendor Advisory: https://www.advantech.com/support
Restart Required: Yes
Instructions:
1. Download latest version from Advantech support portal. 2. Backup current configuration. 3. Install update following vendor instructions. 4. Restart R-SeeNet services.
🔧 Temporary Workarounds
Network Access Restriction
windowsRestrict network access to R-SeeNet services using firewall rules
Windows Firewall: New-NetFirewallRule -DisplayName "Block R-SeeNet" -Direction Inbound -LocalPort 80,443 -Protocol TCP -Action Block
File System Permissions
windowsRestrict access to snmpmon.ini file
icacls "C:\Program Files\Advantech\R-SeeNet\snmpmon.ini" /deny Everyone:(R,W)
🧯 If You Can't Patch
- Isolate R-SeeNet systems in separate network segments with strict firewall rules
- Implement network monitoring for unauthorized access attempts to R-SeeNet services
🔍 How to Verify
Check if Vulnerable:
Check R-SeeNet version in application interface or registry: HKEY_LOCAL_MACHINE\SOFTWARE\Advantech\R-SeeNetCheck Version:
reg query "HKLM\SOFTWARE\Advantech\R-SeeNet" /v VersionVerify Fix Applied:
Verify version is v2.4.24 or later and test that unauthenticated access to snmpmon.ini is blocked📡 Detection & Monitoring
Log Indicators:
- Unauthenticated access attempts to snmpmon.ini
- File modification events for snmpmon.ini
Network Indicators:
- Unusual HTTP requests to R-SeeNet web interface from external IPs
SIEM Query:
source="R-SeeNet" AND (uri="*snmpmon.ini*" OR file_path="*snmpmon.ini*")