CVE-2021-41959 : Exploit Details and Defense Strategies

JerryScript Git version 14ff5bf has a memory leak vulnerability due to insufficient memory tracking and release.

Understanding CVE-2021-41959

What is CVE-2021-41959?

JerryScript Git version 14ff5bf fails to adequately manage allocated memory after RegExp, leading to a memory leak.

The Impact of CVE-2021-41959

This vulnerability allows attackers to cause a memory leak, potentially leading to denial of service or other malicious activities.

Technical Details of CVE-2021-41959

Vulnerability Description

The issue lies in how allocated memory is handled after RegExp in jerry-core/ecma/operations/ecma-regexp-object.c, causing a memory leak.

Affected Systems and Versions

Affected Version: JerryScript Git version 14ff5bf

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting specific inputs to trigger the RegExp operation and exhaust system memory.

Mitigation and Prevention

Immediate Steps to Take

Monitor system memory usage closely for any unusual spikes or patterns.
Apply patches or updates provided by the software vendor.

Long-Term Security Practices

Regularly update and patch software to address known vulnerabilities.
Employ secure coding practices to mitigate memory-related issues.
Conduct regular security audits to identify and address potential vulnerabilities.
Educate development teams on secure coding practices.

Patching and Updates

Ensure to install the latest patches or updates released by the JerryScript project to address the memory leak vulnerability.