CVE-2021-45938: Buffer Overflow

Published Dec 31, 2021

Updated

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

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 the severity of CVE-2021-45938?

The severity of CVE-2021-45938 is medium with a severity value of 5.5.

What is the affected software for CVE-2021-45938?

The affected software for CVE-2021-45938 is wolfSSL wolfMQTT 1.9.

What is the vulnerability description for CVE-2021-45938?

CVE-2021-45938 is a heap-based buffer overflow in MqttClient_DecodePacket in wolfSSL wolfMQTT 1.9.

How can I fix CVE-2021-45938?

To fix CVE-2021-45938, update to a version of wolfSSL wolfMQTT that has the patch for the vulnerability applied.

Where can I find more information about CVE-2021-45938?

More information about CVE-2021-45938 can be found at the following references: [Link 1](https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=39056), [Link 2](https://github.com/google/oss-fuzz-vulns/blob/main/vulns/wolfmqtt/OSV-2021-1353.yaml), [Link 3](https://github.com/wolfSSL/wolfMQTT/commit/84d4b53122e0fa0280c7872350b89d5777dabbb2).