CVE-2021-22659

Description

Rockwell Automation MicroLogix 1400 Version 21.6 and below may allow a remote unauthenticated attacker to send a specially crafted Modbus packet allowing the attacker to retrieve or modify random values in the register. If successfully exploited, this may lead to a buffer overflow resulting in a denial-of-service condition. The FAULT LED will flash RED and communications may be lost. Recovery from denial-of-service condition requires the fault to be cleared by the user.

Weakness classification

• ics-cert@hq.dhs.gov: CWE-120

Primary references

• ics-cert@hq.dhs.gov — Permissions Required, Vendor Advisory
• ics-cert@hq.dhs.gov — Third Party Advisory, US Government Resource
• af854a3a-2127-422b-91ae-364da2661108 — Permissions Required, Vendor Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, US Government Resource