CVE-2021-45937: Buffer Overflow

Published Dec 31, 2021

Updated

wolfSSL wolfMQTT 1.9 has a heap-based buffer overflow in MqttClientDecodePacket (called from MqttClientWaitType and MqttClientConnect).

Affected Software

1 affected component

wolfSSL wolfMQTT=1.9

Remediation

Patch Available

https://github.com/wolfSSL/wolfMQTT/commit/84d4b53122e0fa0280c7872350b89d5777dabbb2

Event History

Dec 31, 2021

CVE Published

via MITRE·11:57 PM

Data Sourced

via MITRE·11:57 PM

Description

Jan 1, 2022

Data Sourced

via NVD·01:15 AM

RemedyDescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

What is CVE-2021-45937?

CVE-2021-45937 is a vulnerability in wolfSSL wolfMQTT 1.9 that allows a heap-based buffer overflow in MqttClient_DecodePacket.

How severe is CVE-2021-45937?

CVE-2021-45937 has a severity rating of medium (5.5).

How does CVE-2021-45937 affect wolfSSL wolfMQTT?

CVE-2021-45937 affects wolfSSL wolfMQTT version 1.9.

How can I fix CVE-2021-45937?

To fix CVE-2021-45937, update to a version of wolfSSL wolfMQTT that is not affected by the vulnerability.

Where can I find more information about CVE-2021-45937?

More information about CVE-2021-45937 can be found in the references provided: [link 1](https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=39083), [link 2](https://github.com/google/oss-fuzz-vulns/blob/main/vulns/wolfmqtt/OSV-2021-1349.yaml), [link 3](https://github.com/wolfSSL/wolfMQTT/commit/84d4b53122e0fa0280c7872350b89d5777dabbb2).