What is the vulnerability ID for this issue?

The vulnerability ID for this issue is CVE-2021-33012.

What is the severity of CVE-2021-33012?

The severity of CVE-2021-33012 is high with a severity value of 8.6.

How does CVE-2021-33012 affect Rockwell Automation MicroLogix 1100?

CVE-2021-33012 allows a remote unauthenticated attacker to send specially crafted commands to cause a denial-of-service condition on the MicroLogix 1100 when it is switched to RUN mode.

How can CVE-2021-33012 be exploited?

CVE-2021-33012 can be exploited by sending specially crafted commands to the MicroLogix 1100 controller when it is in RUN mode.

Is Rockwell Automation MicroLogix 1100 firmware affected by CVE-2021-33012?

Yes, Rockwell Automation MicroLogix 1100 firmware is affected by CVE-2021-33012.

Vulnerability/
CVE-2021-33012

high

8.6

CWE

9/7/2021

3/8/2024

CVE-2021-33012: Input Validation

First published: Fri Jul 09 2021(Updated: )

Rockwell Automation MicroLogix 1100, all versions, allows a remote, unauthenticated attacker sending specially crafted commands to 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 fault whenever the controller is switched to RUN mode.

Credit: ics-cert@hq.dhs.gov

Affected Software	Affected Version	How to fix
Rockwellautomation Micrologix 1100 Firmware
Rockwellautomation Micrologix 1100

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

ICSA-21-189-01

Frequently Asked Questions

What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2021-33012.
What is the severity of CVE-2021-33012?
The severity of CVE-2021-33012 is high with a severity value of 8.6.
How does CVE-2021-33012 affect Rockwell Automation MicroLogix 1100?
CVE-2021-33012 allows a remote unauthenticated attacker to send specially crafted commands to cause a denial-of-service condition on the MicroLogix 1100 when it is switched to RUN mode.
How can CVE-2021-33012 be exploited?
CVE-2021-33012 can be exploited by sending specially crafted commands to the MicroLogix 1100 controller when it is in RUN mode.
Is Rockwell Automation MicroLogix 1100 firmware affected by CVE-2021-33012?
Yes, Rockwell Automation MicroLogix 1100 firmware is affected by CVE-2021-33012.

collector/nvd-index
agent/type
agent/softwarecombine
collector/mitre-cve
source/MITRE
agent/weakness
agent/last-modified-date
agent/author
agent/references
agent/severity
agent/description
agent/first-publish-date
agent/event
agent/tags
collector/ics-cert-advisory
source/ICS
vendor/rockwellautomation
canonical/rockwellautomation micrologix 1100 firmware
canonical/rockwellautomation micrologix 1100

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