CVE-2021-43882

Microsoft Defender for IoT Remote Code Execution Vulnerability

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Microsoft Defender for IoT Remote Code Execution Vulnerability

Una vulnerabilidad de Ejecución de Código Remota de Microsoft Defender for IoT. Este ID de CVE es diferente de CVE-2021-41365, CVE-2021-42310, CVE-2021-42311, CVE-2021-42313, CVE-2021-42314, CVE-2021-42315, CVE-2021-43889

This vulnerability allows remote attackers to bypass authentication on affected installations of Microsoft Azure Defender for IoT console and sensor appliances. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the password reset mechanism. The issue results from the lack of proper validation of a certificate chain. An attacker can leverage this vulnerability to bypass authentication on the system.

*Credits: Anonymous

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-11-16 CVE Reserved
2021-12-15 CVE Published
2024-08-04 CVE Updated
2024-12-17 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-295: Improper Certificate Validation

CAPEC

References (2)

URL	Tag	Source
https://www.zerodayinitiative.com/advisories/ZDI-21-1553	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43882	2023-12-28

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Microsoft Search vendor "Microsoft"		Defender For Iot Search vendor "Microsoft" for product "Defender For Iot"				< 10.5.3 Search vendor "Microsoft" for product "Defender For Iot" and version " < 10.5.3"		-		Affected