CVE-2019-20020 : What You Need to Know

An issue involving the over-reading of a buffer based on a stack has been identified in the function ReadNextStructField within the mat5.c file of the matio version 1.5.17.

Understanding CVE-2019-20020

A stack-based buffer over-read vulnerability in matio 1.5.17.

What is CVE-2019-20020?

CVE-2019-20020 is a vulnerability in the matio library version 1.5.17 that allows over-reading of a buffer based on a stack, specifically in the ReadNextStructField function.

The Impact of CVE-2019-20020

This vulnerability could be exploited by an attacker to read sensitive information from the memory, leading to potential information disclosure.

Technical Details of CVE-2019-20020

A stack-based buffer over-read vulnerability in matio 1.5.17.

Vulnerability Description

The issue lies in the ReadNextStructField function within the mat5.c file, allowing unauthorized access to sensitive data.

Affected Systems and Versions

Systems using matio version 1.5.17

Exploitation Mechanism

Attackers can exploit this vulnerability to read beyond the allocated memory space, potentially accessing confidential information.

Mitigation and Prevention

Steps to address and prevent the CVE-2019-20020 vulnerability.

Immediate Steps to Take

Update matio to a patched version that addresses the buffer over-read issue.
Monitor system logs for any unusual activities that might indicate exploitation attempts.

Long-Term Security Practices

Regularly update software and libraries to the latest secure versions.
Implement secure coding practices to prevent buffer over-read vulnerabilities.

Patching and Updates

Apply patches provided by the matio project to fix the buffer over-read vulnerability.