CVE-2020-6111

An exploitable denial-of-service vulnerability exists in the IPv4 functionality of Allen-Bradley MicroLogix 1100 Programmable Logic Controller Systems Series B FRN 16.000, Series B FRN 15.002, Series B FRN 15.000, Series B FRN 14.000, Series B FRN 13.000, Series B FRN 12.000, Series B FRN 11.000 and Series B FRN 10.000. A specially crafted packet can cause a major error, resulting in a denial of service. An attacker can send a malicious packet to trigger this vulnerability.

• CWE-189

• https://talosintelligence.com/vulnerability_reports/TALOS-2020-1057Third Party Advisory
• https://us-cert.cisa.gov/ics/advisories/icsa-21-047-02Third Party Advisory, US Government Resource
• https://talosintelligence.com/vulnerability_reports/TALOS-2020-1057Third Party Advisory
• https://us-cert.cisa.gov/ics/advisories/icsa-21-047-02Third Party Advisory, US Government Resource

Published

Dec 3, 2020

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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