CVE-2021-36977 : Vulnerability Insights and Analysis
Learn about CVE-2021-36977, a heap-based buffer overflow vulnerability in matio 1.5.20 and 1.5.21 related to HDF5 1.12.0. Find out the impact, technical details, affected systems, and mitigation steps.
A heap-based buffer overflow vulnerability was discovered in matio (MAT File I/O Library) versions 1.5.20 and 1.5.21. This vulnerability is related to the use of HDF5 1.12.0 and can be exploited by attackers.
Understanding CVE-2021-36977
This section covers the essential aspects of the CVE-2021-36977 vulnerability.
What is CVE-2021-36977?
The heap-based buffer overflow in matio (MAT File I/O Library) versions 1.5.20 and 1.5.21 arises due to a flaw in H5MM_memcpy, which is called from H5MM_malloc and H5C_load_entry functions. Attackers can exploit this vulnerability with malicious intent.
The Impact of CVE-2021-36977
The impact of this vulnerability could lead to unauthorized access, denial of service, or arbitrary code execution, posing a significant risk to affected systems.
Technical Details of CVE-2021-36977
This section delves into the technical details of the CVE-2021-36977 vulnerability.
Vulnerability Description
The vulnerability involves a heap-based buffer overflow in matio (MAT File I/O Library) versions 1.5.20 and 1.5.21 due to the improper handling of data, specifically in the H5MM_memcpy function.
Affected Systems and Versions
The affected versions include matio 1.5.20 and 1.5.21. Systems utilizing HDF5 1.12.0 are also impacted by this vulnerability.
Exploitation Mechanism
Attackers can exploit this vulnerability by crafting a malicious input to trigger the heap-based buffer overflow, potentially leading to the execution of arbitrary code or a denial of service.
Mitigation and Prevention
In this section, we discuss the necessary steps to mitigate and prevent exploitation of CVE-2021-36977.
Immediate Steps to Take
It is crucial to update matio to a non-vulnerable version and apply patches provided by the vendor. Additionally, monitoring system logs for any unusual activities can help detect potential exploitation attempts.
Long-Term Security Practices
Implementing secure coding practices, conducting regular security audits, and maintaining up-to-date software can help prevent similar vulnerabilities in the future.
Patching and Updates
Regularly check for security updates and patches released by the vendor to address known vulnerabilities and enhance the overall security posture of the systems.