CVE-2018-20201 Explained : Impact and Mitigation

Espruino 2V00's jsfNameFromString function in the jsflash.c file is susceptible to a stack-based buffer over-read vulnerability, potentially leading to denial of service or other impacts when processing a specially crafted js file.

Understanding CVE-2018-20201

This CVE entry describes a vulnerability in Espruino 2V00 that could be exploited to cause a denial of service or other adverse effects.

What is CVE-2018-20201?

The vulnerability in the jsfNameFromString function of Espruino 2V00 allows for a stack-based buffer over-read, which could be triggered by processing a maliciously crafted js file.

The Impact of CVE-2018-20201

The vulnerability could result in a denial of service or other unspecified impacts when a specially crafted js file is processed by the affected function.

Technical Details of CVE-2018-20201

Espruino 2V00's vulnerability is detailed below:

Vulnerability Description

The vulnerability lies in the jsfNameFromString function of jsflash.c, allowing for a stack-based buffer over-read.

Affected Systems and Versions

Affected version: Espruino 2V00

Exploitation Mechanism

The vulnerability can be exploited by processing a specially crafted js file.

Mitigation and Prevention

Protect your systems from CVE-2018-20201 with the following measures:

Immediate Steps to Take

Implement input validation to prevent the processing of malicious js files.
Consider limiting access to the vulnerable function.

Long-Term Security Practices

Regularly update and patch the affected software.
Stay informed about security vulnerabilities and best practices.

Patching and Updates

Ensure you apply any patches or updates provided by Espruino to address the vulnerability.