CVE-2021-46244 : Exploit Details and Defense Strategies

A Divide By Zero vulnerability in HDF5 v1.13.1-1 via function H5T__complete_copy() at /hdf5/src/H5T.c leads to a Denial of Service (DoS).

Understanding CVE-2021-46244

What is CVE-2021-46244?

This CVE involves a Divide By Zero vulnerability in HDF5 v1.13.1-1, specifically within the function H5T__complete_copy() at /hdf5/src/H5T.c. The vulnerability results in an arithmetic exception causing a Denial of Service (DoS) attack.

The Impact of CVE-2021-46244

The vulnerability allows attackers to trigger an arithmetic exception, leading to system crashes and potential service disruptions.

Technical Details of CVE-2021-46244

Vulnerability Description

The vulnerability exists in HDF5 v1.13.1-1 due to improper handling of divide by zero errors in the function H5T__complete_copy() at /hdf5/src/H5T.c.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Version: Not applicable

Exploitation Mechanism

Attackers can exploit this vulnerability by sending specifically crafted inputs to trigger the divide by zero error, resulting in a DoS situation.

Mitigation and Prevention

Immediate Steps to Take

Apply official patches provided by HDF5 to address the vulnerability.
Regularly update and monitor the software for security patches and fixes.

Long-Term Security Practices

Implement input validation mechanisms to prevent malicious inputs.
Conduct regular security assessments and audits to identify vulnerabilities.
Follow the principle of least privilege to restrict system access.
Educate developers and users on secure coding practices.
Consider using sandboxing or containerization to isolate applications.

Patching and Updates

Ensure timely installation of security patches released by HDF5 to remediate the vulnerability.