CVE-2021-45936: Buffer Overflow

Published Dec 31, 2021

Updated

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

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-2021-45936?

CVE-2021-45936 is a heap-based buffer overflow vulnerability in wolfSSL wolfMQTT 1.9.

How severe is CVE-2021-45936?

CVE-2021-45936 is classified as a medium severity vulnerability with a severity score of 5.5.

Which software versions are affected by CVE-2021-45936?

Versions 1.9 of wolfSSL wolfMQTT are affected by CVE-2021-45936.

How can I fix CVE-2021-45936?

To fix CVE-2021-45936, users should update to a version of wolfSSL wolfMQTT that is not affected by the vulnerability.

Where can I find more information about CVE-2021-45936?

You can find more information about CVE-2021-45936 at the following references: [1](https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=39053), [2](https://github.com/google/oss-fuzz-vulns/blob/main/vulns/wolfmqtt/OSV-2021-1348.yaml), [3](https://github.com/wolfSSL/wolfMQTT/commit/84d4b53122e0fa0280c7872350b89d5777dabbb2).