CVE-2021-45937

Public Exploit

Description

wolfSSL wolfMQTT 1.9 has a heap-based buffer overflow in MqttClient_DecodePacket (called from MqttClient_WaitType and MqttClient_Connect).

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.20%
Third-Party Advisory chromium.org Third-Party Advisory github.com Third-Party Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/wolfSSL/wolfMQTT/commit/84d4b53122e0fa0280c7872350b89d5777dabbb2 third party advisory patch
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/wolfmqtt/OSV-2021-1349.yaml third party advisory exploit
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=39083 issue tracking exploit third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-45937?
CVE-2021-45937 has been scored as a medium severity vulnerability.
How to fix CVE-2021-45937?
To fix CVE-2021-45937, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-45937 being actively exploited in the wild?
It is possible that CVE-2021-45937 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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