CVE-2019-20791 Explained : Impact and Mitigation

OpenThread before 2019-12-13 has a stack-based buffer overflow vulnerability in the MeshCoP::Commissioner::GeneratePskc function.

Understanding CVE-2019-20791

This CVE involves a critical vulnerability in OpenThread that could be exploited by attackers.

What is CVE-2019-20791?

The MeshCoP::Commissioner::GeneratePskc function in OpenThread prior to 2019-12-13 suffers from a stack-based buffer overflow vulnerability.

The Impact of CVE-2019-20791

This vulnerability could allow remote attackers to execute arbitrary code or cause a denial of service (DoS) condition on the affected system.

Technical Details of CVE-2019-20791

OpenThread before 2019-12-13 is susceptible to a stack-based buffer overflow.

Vulnerability Description

The MeshCoP::Commissioner::GeneratePskc function in OpenThread has a stack-based buffer overflow vulnerability.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: All versions prior to 2019-12-13

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting malicious input to trigger the buffer overflow, potentially leading to arbitrary code execution or a DoS condition.

Mitigation and Prevention

It is crucial to take immediate steps to mitigate the risks posed by CVE-2019-20791.

Immediate Steps to Take

Apply the necessary security patches provided by OpenThread to address this vulnerability.
Monitor network traffic for any signs of exploitation.
Implement strong input validation mechanisms to prevent buffer overflows.

Long-Term Security Practices

Regularly update and patch all software and firmware to prevent known vulnerabilities.
Conduct security assessments and penetration testing to identify and address potential weaknesses.

Patching and Updates

Ensure that all systems running OpenThread are updated to versions released after 2019-12-13 to eliminate the buffer overflow vulnerability.