CVE-2024-6436
📋 TL;DR
An input validation vulnerability in Rockwell Automation Sequence Manager allows attackers to send malformed packets causing denial-of-service. The device becomes unresponsive requiring manual restart, and users lose visibility into downstream equipment sequences while operations continue. This affects industrial control systems using vulnerable Sequence Manager versions.
💻 Affected Systems
- Rockwell Automation Sequence Manager
📦 What is this software?
Sequencemanager by Rockwellautomation
⚠️ Risk & Real-World Impact
Worst Case
Critical industrial process disruption requiring manual restart, loss of operational visibility, and potential safety implications if operators cannot monitor equipment sequences.
Likely Case
Temporary denial-of-service requiring manual device restart and loss of monitoring capability for equipment sequences.
If Mitigated
No impact if proper network segmentation and input validation controls are implemented.
🎯 Exploit Status
Vulnerability involves sending malformed packets to the server, which suggests relatively simple exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 6.01.00
Vendor Advisory: https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1679.html
Restart Required: Yes
Instructions:
1. Download Sequence Manager version 6.01.00 from Rockwell Automation website. 2. Backup current configuration. 3. Install the update following vendor documentation. 4. Restart the system. 5. Verify functionality.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to Sequence Manager to only authorized systems and users.
Firewall Rules
allImplement firewall rules to block unnecessary traffic to Sequence Manager ports.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Sequence Manager from untrusted networks
- Deploy intrusion detection/prevention systems to monitor for malformed packet patterns
🔍 How to Verify
Check if Vulnerable:
Check Sequence Manager version in application interface or installation directory. Versions below 6.01.00 are vulnerable.Check Version:
Check application 'About' section or installation propertiesVerify Fix Applied:
Confirm version is 6.01.00 or higher and test system responsiveness to normal operations.📡 Detection & Monitoring
Log Indicators:
- Unexpected service restarts
- Connection errors to Sequence Manager
- System unresponsiveness logs
Network Indicators:
- Unusual packet patterns to Sequence Manager ports
- Multiple connection attempts with malformed data
SIEM Query:
source="SequenceManager" AND (event_type="crash" OR event_type="unresponsive")