CVE-2025-11784
📋 TL;DR
This CVE describes a critical stack-based buffer overflow vulnerability in Circutor SGE-PLC1000/SGE-PLC50 devices. An attacker can exploit this by sending excessively large input to the 'meter' parameter, potentially allowing remote code execution or device crash. Organizations using these specific PLC devices are affected.
💻 Affected Systems
- Circutor SGE-PLC1000
- Circutor SGE-PLC50
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with full device compromise, allowing attacker to manipulate industrial processes, steal data, or cause physical damage.
Likely Case
Device crash leading to denial of service in industrial environments, potentially disrupting critical operations.
If Mitigated
Limited impact if devices are isolated in segmented networks with strict input validation at perimeter.
🎯 Exploit Status
Direct buffer overflow via user-controlled parameter makes exploitation straightforward for skilled attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.incibe.es/en/incibe-cert/notices/aviso-sci/multiple-vulnerabilities-circutor-products-0
Restart Required: Yes
Instructions:
1. Monitor vendor website for firmware updates. 2. Download and verify firmware. 3. Backup configuration. 4. Apply firmware update via management interface. 5. Restart device. 6. Verify functionality.
🔧 Temporary Workarounds
Network Segmentation
allIsolate PLC devices in dedicated industrial network segments with strict firewall rules.
Input Validation Proxy
allDeploy a reverse proxy that validates and sanitizes all input to PLC devices.
🧯 If You Can't Patch
- Implement strict network access controls allowing only trusted IPs to communicate with PLCs.
- Deploy intrusion detection systems monitoring for buffer overflow attempts against PLC devices.
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface or serial console. If version is v9.0.2, device is vulnerable.Check Version:
Check via web interface at http://<device-ip>/status or via serial console using vendor-specific commands.Verify Fix Applied:
After applying any vendor patch, verify firmware version is higher than v9.0.2 and test functionality.📡 Detection & Monitoring
Log Indicators:
- Unusually large parameter values in PLC access logs
- Device crash/restart events
Network Indicators:
- Large payloads sent to PLC web interface on port 80/443
- Repeated connection attempts with varying parameter sizes
SIEM Query:
source="plc_logs" AND (parameter_size>1000 OR message="buffer overflow")