What is CVE-2021-42311?

CVE-2021-42311 is a vulnerability in Microsoft Azure Defender for IoT that allows remote attackers to bypass authentication.

How can remote attackers exploit CVE-2021-42311?

Remote attackers can exploit CVE-2021-42311 by bypassing authentication on affected installations of Microsoft Azure Defender for IoT.

What software versions are affected by CVE-2021-42311?

Microsoft Defender for IoT versions up to and excluding 10.5.2 are affected by CVE-2021-42311.

How severe is CVE-2021-42311?

CVE-2021-42311 has a severity value of 10, which is classified as critical.

Are there any patches or remedies available for CVE-2021-42311?

Yes, Microsoft has released patches and remediation guidance for CVE-2021-42311. You can find the details in the Microsoft Security Guidance Advisory.

Vulnerability/
CVE-2021-42311

critical

CWE

14/12/2021

15/12/2021

16/1/2024

21/11/2024

CVE-2021-42311: Microsoft Azure Defender for IoT update-handshake Endpoint SQL Injection 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	<10.5.2
Microsoft Azure Defender for IoT
Microsoft Defender for IoT		fix available externally
	<10.5.2

Remedy

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42311

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Reference Links

Frequently Asked Questions

What is CVE-2021-42311?
CVE-2021-42311 is a vulnerability in Microsoft Azure Defender for IoT that allows remote attackers to bypass authentication.
How can remote attackers exploit CVE-2021-42311?
Remote attackers can exploit CVE-2021-42311 by bypassing authentication on affected installations of Microsoft Azure Defender for IoT.
What software versions are affected by CVE-2021-42311?
Microsoft Defender for IoT versions up to and excluding 10.5.2 are affected by CVE-2021-42311.
How severe is CVE-2021-42311?
CVE-2021-42311 has a severity value of 10, which is classified as critical.
Are there any patches or remedies available for CVE-2021-42311?
Yes, Microsoft has released patches and remediation guidance for CVE-2021-42311. You can find the details in the Microsoft Security Guidance Advisory.

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