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CVE-2021-34434

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 存在安全漏洞，该漏洞源于在Eclipse mosquito 2.0到2.0.11版本中，当使用动态安全插件时，如果在持久客户端离线时取消客户端订阅主题的能力，则不会取消该客户端的现有订阅。

AI Predicted 6.5 Difficulty: Hard EPSS 1.33% · P70

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2021-34434

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
In Eclipse Mosquitto versions 2.0 to 2.0.11, when using the dynamic security plugin, if the ability for a client to make subscriptions on a topic is revoked when a durable client is offline, then existing subscriptions for that client are not revoked.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Eclipse Mosquitto 授权问题漏洞
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 存在安全漏洞，该漏洞源于在Eclipse mosquito 2.0到2.0.11版本中，当使用动态安全插件时，如果在持久客户端离线时取消客户端订阅主题的能力，则不会取消该客户端的现有订阅。
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 2.0 ~ unspecified -

II. Public POCs for CVE-2021-34434

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III. Intelligence Information for CVE-2021-34434

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Vendor Advisories for CVE-2021-34434 (1)

Mailing List Discussions for CVE-2021-34434 (2)

Other References for CVE-2021-34434 (1)

IV. Related Vulnerabilities

Same product: Eclipse Mosquitto
Same vendor: The Eclipse Foundation
Same weakness: CWE-285

V. Comments for CVE-2021-34434

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