CVE-2025-27449
📋 TL;DR
The MEAC300-FNADE4 device lacks rate limiting for authentication attempts, allowing attackers to systematically guess passwords via brute-force attacks. This affects all users of this specific industrial control system device who rely on its authentication mechanism.
💻 Affected Systems
- MEAC300-FNADE4
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise leading to unauthorized control of industrial processes, data exfiltration, or disruption of operations.
Likely Case
Unauthorized access to device configuration and control functions, potentially enabling further network penetration.
If Mitigated
Limited impact with proper network segmentation and monitoring, though authentication attempts may still be attempted.
🎯 Exploit Status
Brute-force attacks require no special tools beyond standard password guessing utilities.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://sick.com/psirt
Restart Required: No
Instructions:
Check vendor advisory for firmware updates. If available, download from official source and follow vendor installation procedures.
🔧 Temporary Workarounds
Implement Network-Based Rate Limiting
allUse firewall or network security devices to limit authentication attempts per source IP.
Use Strong Authentication
allImplement complex passwords and consider multi-factor authentication if supported.
🧯 If You Can't Patch
- Segment device on isolated network with strict access controls
- Implement network monitoring for repeated authentication failures
🔍 How to Verify
Check if Vulnerable:
Attempt multiple failed logins within short timeframe. If device doesn't lock out or delay responses, it's vulnerable.Check Version:
Check device web interface or console for firmware version informationVerify Fix Applied:
Test if rate limiting or account lockout activates after multiple failed attempts.📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts from single source
- Rapid succession login failures
Network Indicators:
- High volume of authentication packets to device
- Patterned login attempts
SIEM Query:
source_ip="device_ip" AND event_type="authentication_failure" | stats count by source_ip | where count > 10🔗 References
- https://sick.com/psirt
- https://sick.com/psirt
- https://www.cisa.gov/resources-tools/resources/ics-recommended-practices
- https://www.endress.com
- https://www.first.org/cvss/calculator/3.1
- https://www.sick.com/.well-known/csaf/white/2025/sca-2025-0008.json
- https://www.sick.com/.well-known/csaf/white/2025/sca-2025-0008.pdf
