Description
The connection establishment algorithm found in Rockwell Automation CompactLogix 5370 and ControlLogix 5570 versions 33 and prior does not sufficiently manage its control flow during execution, creating an infinite loop. This may allow an attacker to send specially crafted CIP packet requests to a controller, which may cause denial-of-service conditions in communications with other products.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Rockwell Automation | Armor Compact GuardLogix 5370 controllers | unspecified – ≤ versions 33 and prior | — |
| Rockwell Automation | Armor GuardLogix Safety Controllers | unspecified – ≤ versions 33 and prior | — |
| Rockwell Automation | CompactLogix 5370 L1 controllers | unspecified – ≤ versions 33 and prior | — |
| Rockwell Automation | CompactLogix 5370 L2 controllers | unspecified – ≤ versions 33 and prior | — |
| Rockwell Automation | CompactLogix 5370 L3 controllers | unspecified – ≤ versions 33 and prior | — |
| Rockwell Automation | Compact GuardLogix 5370 controllers | unspecified – ≤ versions 33 and prior | — |
| Rockwell Automation | ControlLogix 5570 controllers | unspecified – ≤ versions 33 and prior | — |
Advisories 1
- ICSA-21-061-02 Rockwell Automation CompactLogix 5370 and ControlLogix 5570 Controllers (Update A) CISA ICS & IT advisories · Mar 23, 2021