CVE-2024-2427
📋 TL;DR
A denial-of-service vulnerability in Rockwell Automation PowerFlex 527 drives allows attackers to crash the device by sending multiple data packets repeatedly. This affects industrial control systems using these drives, requiring manual restart to recover functionality. The vulnerability stems from improper traffic throttling (CWE-20).
💻 Affected Systems
- Rockwell Automation PowerFlex 527
📦 What is this software?
Powerflex 527 Ac Drives Firmware by Rockwellautomation
⚠️ Risk & Real-World Impact
Worst Case
Critical industrial processes halt completely, causing production downtime, safety risks, and potential equipment damage until manual restart is performed.
Likely Case
Targeted DoS attacks disrupt specific PowerFlex 527 drives, causing localized production interruptions and maintenance overhead.
If Mitigated
With proper network segmentation and traffic filtering, impact is limited to isolated network segments with minimal disruption.
🎯 Exploit Status
Simple packet flooding attack requires no authentication. Weaponization likely due to ICS/OT targeting.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific firmware versions
Vendor Advisory: https://www.rockwellautomation.com/en-us/support/advisory.SD1664.html
Restart Required: Yes
Instructions:
1. Review Rockwell Automation advisory SD1664. 2. Download appropriate firmware update. 3. Apply update following vendor procedures. 4. Restart device. 5. Verify functionality.
🔧 Temporary Workarounds
Network Segmentation
allIsolate PowerFlex 527 drives in dedicated network segments with strict access controls
Traffic Filtering
allImplement firewall rules to limit traffic to PowerFlex 527 drives from authorized sources only
🧯 If You Can't Patch
- Implement strict network segmentation to isolate PowerFlex 527 drives from untrusted networks
- Deploy intrusion prevention systems with DoS protection capabilities to monitor and block malicious traffic patterns
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against vendor advisory. If accessible, test with controlled traffic patterns (caution: may cause downtime).Check Version:
Check via Connected Components Workbench or device web interface for firmware versionVerify Fix Applied:
Verify firmware version matches patched version from vendor advisory. Test with controlled traffic to confirm stability.📡 Detection & Monitoring
Log Indicators:
- Device restart logs
- Network traffic spikes to PowerFlex 527 IPs
- Connection attempts from unusual sources
Network Indicators:
- High volume of packets to PowerFlex 527 ports
- Repeated connection attempts from single sources
- Abnormal traffic patterns to industrial control devices
SIEM Query:
source_ip="PowerFlex_527_IP" AND (packet_count>threshold OR connection_count>threshold) WITHIN 5m