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CVE-2020-6998

Rockwell Automation CompactLogix 5370 and ControlLogix 5570 Controllers Improper Input Validation

CVSS 5.8 MEDIUMEPSS 1.7%CWE-20
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Affected products
Rockwell Automation · Armor Compact GuardLogix 5370 controllersRockwell Automation · Armor GuardLogix Safety ControllersRockwell Automation · Compact GuardLogix 5370 controllersRockwell Automation · CompactLogix 5370 L1 controllersRockwell Automation · CompactLogix 5370 L2 controllersRockwell Automation · CompactLogix 5370 L3 controllersRockwell Automation · ControlLogix 5570 controllers

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References
https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1130398https://www.cisa.gov/uscert/ics/advisories/icsa-21-061-02