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Rewterz Threat Advisory –ICS: Rockwell Automation MicroLogix 1100

Severity

High

Analysis Summary

CVE-2021-33012

A remote, unauthenticated attacker sending specially crafted commands could cause the PLC to fault when the controller is switched to RUN mode, which results in a denial-of-service condition. If successfully exploited, this vulnerability will cause the controller to a fault when the controller is switched to RUN mode.

Impact

  • Denial-of-Service

Affected Vendors

Rockwell Automation

Affected Products

  • MicroLogix 1100: All versions

Remediation

Visit the website for more information on the affected products, patches, and updates. https://us-cert.cisa.gov/ics/advisories/icsa-21-189-01