CVE-2021-33442 : Vulnerability Insights and Analysis

An issue was discovered in mjs (mJS: Restricted JavaScript engine), ES6 (JavaScript version 6). The vulnerability involves a NULL pointer dereference in json_printf() in mjs.c

Understanding CVE-2021-33442

This section provides insights into the impact and technical details of CVE-2021-33442.

What is CVE-2021-33442?

CVE-2021-33442 is a vulnerability found in mJS (Restricted JavaScript engine) that leads to a NULL pointer dereference in json_printf() within the mjs.c file.

The Impact of CVE-2021-33442

The vulnerability poses a risk of a NULL pointer dereference, which could potentially be exploited by attackers to cause a denial of service or execute arbitrary code on the targeted system.

Technical Details of CVE-2021-33442

Let's delve into the technical aspects of CVE-2021-33442 to understand the vulnerability further.

Vulnerability Description

The vulnerability resides in the json_printf() function within the mjs.c file, leading to a NULL pointer dereference.

Affected Systems and Versions

The impact of CVE-2021-33442 affects mJS and ES6 versions that utilize the vulnerable json_printf() function.

Exploitation Mechanism

Attackers can potentially exploit this vulnerability to trigger a NULL pointer dereference, leading to a system crash or opening the door for arbitrary code execution.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-33442, immediate actions and long-term security practices are recommended.

Immediate Steps to Take

It is crucial to apply available patches or updates provided by the vendor to address the vulnerability and prevent potential exploits.

Long-Term Security Practices

Implementing secure coding practices, regular security audits, and staying updated on security advisories can help prevent similar vulnerabilities in the future.

Patching and Updates

Stay informed about patches released by the vendor and promptly apply them to secure the affected systems.