CVE-2020-6998 - CVE House
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Status published Medium CVE-2020-6998

Rockwell Automation CompactLogix 5370 and ControlLogix 5570 Controllers Improper Input Validation

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Yeop Chang reported this vulnerability to CISA.

References

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Affected Vendor

Rockwell Automation

View all reports →

Affected Software

Armor Compact GuardLogix 5370 controllers, Armor GuardLogix Safety Controllers, CompactLogix 5370 L1 controllers, CompactLogix 5370 L2 controllers, CompactLogix 5370 L3 controllers, Compact GuardLogix 5370 controllers, ControlLogix 5570 controllers
Vulnerable Versions:
unspecified

Timeline

Official Publish: July 27th, 2022
Last Modified: April 17th, 2025
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.