CVE-2021-45938 : Security Advisory and Response
Learn about the CVE-2021-45938 vulnerability in wolfSSL wolfMQTT 1.9, impacting systems with a heap-based buffer overflow. Find mitigation steps and long-term security practices here.
wolfSSL wolfMQTT 1.9 has a heap-based buffer overflow vulnerability in MqttClient_DecodePacket.
Understanding CVE-2021-45938
What is CVE-2021-45938?
wolfSSL wolfMQTT 1.9 is affected by a heap-based buffer overflow in the MqttClient_DecodePacket function, which can be triggered from MqttClient_WaitType and MqttClient_Unsubscribe.
The Impact of CVE-2021-45938
This vulnerability could allow an attacker to execute arbitrary code, leading to a potential compromise of the system.
Technical Details of CVE-2021-45938
Vulnerability Description
The vulnerability exists in MqttClient_DecodePacket of wolfSSL wolfMQTT 1.9, allowing a heap-based buffer overflow.
Affected Systems and Versions
- Product: N/A
- Vendor: N/A
- Version: N/A
Exploitation Mechanism
The vulnerability can be exploited through crafted MQTT packets, potentially leading to arbitrary code execution.
Mitigation and Prevention
Immediate Steps to Take
- Update wolfSSL wolfMQTT to a non-vulnerable version if available.
- Apply patches provided by the vendor.
- Monitor network traffic for signs of exploitation.
Long-Term Security Practices
- Regularly update software and libraries to the latest versions.
- Conduct security audits and code reviews.
- Implement network segmentation and access controls.
Patching and Updates
Ensure timely application of security patches and updates for all software components.