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CVE-2021-34431

Quick assessment

Affected
The Eclipse Foundation Eclipse Mosquitto
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Eclipse Mosquitto是Eclipse基金会的一套开源的消息代理软件。 Eclipse Mosquitto version 1.6至2.0.10版本存在安全漏洞，经过身份验证的客户机向代理发送了一条精心制作的CONNECT消息，就会发生内存泄漏，这可以用来对代理提供DoS攻击。

AI Predicted 5.3 Difficulty: Moderate EPSS 1.11% · P65

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-34431

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
In Eclipse Mosquitto version 1.6 to 2.0.10, if an authenticated client that had connected with MQTT v5 sent a crafted CONNECT message to the broker a memory leak would occur, which could be used to provide a DoS attack against the broker.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
在移除最后引用时对内存的释放不恰当(内存泄露)
Source: CVE Program / CVE List V5
Vulnerability Title
Eclipse Mosquitto 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Eclipse Mosquitto是Eclipse基金会的一套开源的消息代理软件。 Eclipse Mosquitto version 1.6至2.0.10版本存在安全漏洞，经过身份验证的客户机向代理发送了一条精心制作的CONNECT消息，就会发生内存泄漏，这可以用来对代理提供DoS攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
The Eclipse Foundation Eclipse Mosquitto 1.6 ~ unspecified -

II. Public POCs for CVE-2021-34431

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III. Intelligence Information for CVE-2021-34431

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Other References for CVE-2021-34431 (1)

IV. Related Vulnerabilities

Same product: Eclipse Mosquitto
Same vendor: The Eclipse Foundation
Same weakness: CWE-401

V. Comments for CVE-2021-34431

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