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Rockwell Automation ControlLogix, GuardLogix 5580, CompactLogix, Compact GuardLogix 5380

Plan Patch7.5ICS-CERT ICSA-24-226-09Aug 13, 2024
Attack VectorNetwork
Auth RequiredNone
ComplexityLow
User InteractionNone needed
Summary

A denial-of-service vulnerability exists in Rockwell Automation ControlLogix 5580, GuardLogix 5580, CompactLogix 5380, CompactLogix 5480, and Compact GuardLogix 5380 controllers. The vulnerability is triggered by improper validation of CIP (Common Industrial Protocol) messages sent to object 103 (0x67). An attacker with network access can cause the device to crash and become unresponsive. The vulnerability affects controllers with firmware versions below v36.011, v35.013, and v34.014 depending on the product line.

What this means
What could happen
An attacker could cause a denial-of-service condition on affected programmable logic controllers, interrupting production and process control until the device is rebooted or recovered.
Who's at risk
Manufacturing facilities, water treatment plants, electric utilities, and chemical processing operations using Rockwell Automation ControlLogix, GuardLogix 5580, CompactLogix, or Compact GuardLogix 5380 programmable logic controllers. Safety-rated systems using GuardLogix and Compact GuardLogix products are also affected.
How it could be exploited
An attacker with network access to the device sends a specially crafted CIP (Common Industrial Protocol) message to object 103 (0x67) on the PLC. The device fails to properly validate the message, crashes, and becomes unresponsive to control commands.
Prerequisites
  • Network reachability to the PLC on the CIP port (typically UDP 2222 or TCP 44818)
  • No authentication required to send CIP messages
remotely exploitableno authentication requiredlow complexityno patch availableaffects safety systems
Exploitability
Low exploit probability (EPSS 0.1%)
Affected products (5)
5 with fix
ProductAffected VersionsFix Status
CompactLogix 5380 (5069 - L3z): <v36.011_v35.013_v34.014<v36.011 v35.013 v34.014v36.011_v35.013_v34.014 or later
CompactLogix 5480 (5069 - L4): <v36.011_v35.013_v34.014<v36.011 v35.013 v34.014v36.011_v35.013_v34.014 or later
ControlLogix 5580 (1756 - L8z): <v36.011_v35.013_v34.014<v36.011 v35.013 v34.014v36.011_v35.013_v34.014 or later
GuardLogix 5580 (1756 - L8z): <v36.011_v35.013_v34.014<v36.011 v35.013 v34.014v36.011_v35.013_v34.014 or later
Compact GuardLogix 5380 (5069 - L3zS2): <v36.011_v35.013_v34.014<v36.011 v35.013 v34.014v36.011_v35.013_v34.014 or later
Remediation & Mitigation
0/4
Do now
0/1
WORKAROUNDRestrict network access to CIP object 103 (0x67) using firewall or network ACL rules
Schedule — requires maintenance window
0/1

Patching may require device reboot — plan for process interruption

HOTFIXUpdate firmware to v36.011, v35.013, or v34.014 or later depending on product series
Long-term hardening
0/2
HARDENINGIsolate control system network from business network and internet using firewalls and network segmentation
HARDENINGMinimize direct internet exposure of all PLCs; use VPN for any required remote access
View full CISA ICS-CERT advisory
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Rockwell Automation ControlLogix, GuardLogix 5580, CompactLogix, Compact GuardLogix 5380 | CVSS 7.5 - OTPulse