CVE-2021-46548 : Security Advisory and Response

Cesanta MJS v2.20.0 has a SEGV vulnerability in add_lineno_map_item at src/mjs_bcode.c, leading to Denial of Service (DoS).

Understanding CVE-2021-46548

Cesanta MJS v2.20.0 SEGV vulnerability details and impact.

What is CVE-2021-46548?

The vulnerability in Cesanta MJS v2.20.0 allows attackers to cause a Denial of Service (DoS) through SEGV exploit.

The Impact of CVE-2021-46548

The vulnerability can be exploited to trigger a DoS condition affecting the availability of the system.

Technical Details of CVE-2021-46548

Explore the technical aspects of the vulnerability.

Vulnerability Description

The vulnerability exists in Cesanta MJS v2.20.0 due to a flaw in the add_lineno_map_item function in src/mjs_bcode.c.

Affected Systems and Versions

Affected Version: Cesanta MJS v2.20.0

Exploitation Mechanism

Attackers can exploit the vulnerability by manipulating the add_lineno_map_item function, resulting in a DoS condition.

Mitigation and Prevention

Learn how to mitigate the CVE-2021-46548 vulnerability.

Immediate Steps to Take

Update to the latest version of Cesanta MJS to patch the vulnerability.
Implement network security measures to prevent unauthorized access.

Long-Term Security Practices

Regularly monitor security advisories for Cesanta MJS.
Conduct security training for developers to enhance code review processes.

Patching and Updates

Install security patches promptly to address known vulnerabilities in the software.