CVE-2021-46516 Explained : Impact and Mitigation

Cesanta MJS v2.20.0 contains a SEGV vulnerability via mjs_stack_size at mjs/src/mjs_core.c, potentially leading to a Denial of Service (DoS) attack.

Understanding CVE-2021-46516

Cesanta MJS v2.20.0 SEGV Vulnerability

What is CVE-2021-46516?

This CVE identifies a SEGV vulnerability in Cesanta MJS v2.20.0, specifically through mjs_stack_size at mjs/src/mjs_core.c, which could result in a DoS.

The Impact of CVE-2021-46516

The vulnerability poses a risk of causing a Denial of Service (DoS) attack by exploiting the SEGV issue.

Technical Details of CVE-2021-46516

Overview of the Technical Aspects

Vulnerability Description

Cesanta MJS v2.20.0 is susceptible to a SEGV issue via mjs_stack_size, located at mjs/src/mjs_core.c, which could be abused by attackers.

Affected Systems and Versions

Affected Version: v2.20.0
Product: Cesanta MJS
Vendor: Cesanta

Exploitation Mechanism

Attackers can leverage the vulnerability in Cesanta MJS v2.20.0 through mjs_stack_size to orchestrate a Denial of Service (DoS) attack.

Mitigation and Prevention

Protective Measures Against CVE-2021-46516

Immediate Steps to Take

Update Cesanta MJS to a patched version or apply recommended fixes promptly.
Employ network security mechanisms to mitigate the risk of exploitation.

Long-Term Security Practices

Regularly monitor for security advisories and updates from Cesanta.
Enhance code review processes to detect similar vulnerabilities proactively.

Patching and Updates

Install patches or updates provided by Cesanta to address the SEGV vulnerability in MJS v2.20.0.