What is CVE-2021-43882?

CVE-2021-43882 is an authentication bypass vulnerability in Microsoft Azure Defender for IoT that allows remote attackers to bypass authentication.

How severe is CVE-2021-43882?

CVE-2021-43882 has a severity rating of 9.8, which is considered critical.

How does CVE-2021-43882 impact Microsoft Azure Defender for IoT?

CVE-2021-43882 allows remote attackers to bypass authentication on affected installations of Microsoft Azure Defender for IoT console and sensor appliances.

What is the affected software by CVE-2021-43882?

The affected software by CVE-2021-43882 includes Microsoft Azure Defender for IoT, Microsoft Defender for IoT, and Microsoft Defender for IoT console and sensor appliances.

How can I fix CVE-2021-43882?

To fix CVE-2021-43882, update to version 10.5.3 or later of Microsoft Defender for IoT or follow the instructions provided by Microsoft to update the software version of Microsoft Azure Defender for IoT console and sensor appliances.

Vulnerability/
CVE-2021-43882

critical

9.8

CWE

295

14/12/2021

15/12/2021

16/1/2024

21/11/2024

CVE-2021-43882: Microsoft Azure Defender for IoT Improper Certificate Validation Authentication Bypass Vulnerability

First published: Tue Dec 14 2021(Updated: )

Microsoft Defender for IoT Remote Code Execution Vulnerability

Credit: secure@microsoft.com secure@microsoft.com

Affected Software	Affected Version	How to fix
Microsoft Defender for IoT	<10.5.3
Microsoft Azure Defender for IoT
Microsoft Defender for IoT		fix available externally
	<10.5.3

Remedy

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43882

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Reference Links

Frequently Asked Questions

What is CVE-2021-43882?
CVE-2021-43882 is an authentication bypass vulnerability in Microsoft Azure Defender for IoT that allows remote attackers to bypass authentication.
How severe is CVE-2021-43882?
CVE-2021-43882 has a severity rating of 9.8, which is considered critical.
How does CVE-2021-43882 impact Microsoft Azure Defender for IoT?
CVE-2021-43882 allows remote attackers to bypass authentication on affected installations of Microsoft Azure Defender for IoT console and sensor appliances.
What is the affected software by CVE-2021-43882?
The affected software by CVE-2021-43882 includes Microsoft Azure Defender for IoT, Microsoft Defender for IoT, and Microsoft Defender for IoT console and sensor appliances.
How can I fix CVE-2021-43882?
To fix CVE-2021-43882, update to version 10.5.3 or later of Microsoft Defender for IoT or follow the instructions provided by Microsoft to update the software version of Microsoft Azure Defender for IoT console and sensor appliances.

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