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CVE-2021-33176

Quick assessment

Affected
VerneMQ vernemq
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.

MQTT（Message Queuing Telemetry Transport,消息队列遥测传输）是一个ISO 标准（ISO/IEC PRF 20922）下基于发布 (Publish)/订阅 (Subscribe)范式的消息协议，它工作在TCP/IP协议族上，是为硬件性能低下的远程设备以及网络状况不好的情况下而设计的发布/订阅型消息协议。 VerneMQ MQTT Broker在1.12.0之前存在安全漏洞，该漏洞由于处理不受信任的输入而过度消耗内存造成的。

AI Predicted 5.3 Difficulty: Easy EPSS 1.10% · P64
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I. Basic Information for CVE-2021-33176

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
VerneMQ MQTT Broker versions prior to 1.12.0 are vulnerable to a denial of service attack as a result of excessive memory consumption due to the handling of untrusted inputs. These inputs cause the message broker to consume large amounts of memory, resulting in the application being terminated by the operating system.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
VerneMQ MQTT Broker 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MQTT（Message Queuing Telemetry Transport,消息队列遥测传输）是一个ISO 标准（ISO/IEC PRF 20922）下基于发布 (Publish)/订阅 (Subscribe)范式的消息协议，它工作在TCP/IP协议族上，是为硬件性能低下的远程设备以及网络状况不好的情况下而设计的发布/订阅型消息协议。 VerneMQ MQTT Broker在1.12.0之前存在安全漏洞，该漏洞由于处理不受信任的输入而过度消耗内存造成的。
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
VerneMQ vernemq <1.12.0 -

II. Public POCs for CVE-2021-33176

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III. Intelligence Information for CVE-2021-33176

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Other References for CVE-2021-33176 (1)

IV. Related Vulnerabilities

Same weakness: CWE-502

V. Comments for CVE-2021-33176

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