CVE-2018-21036 Explained : Impact and Mitigation

Sails.js versions before v1.0.0-46 have a vulnerability that can be exploited for denial of service when an empty pathname is present in a WebSocket request.

Understanding CVE-2018-21036

This CVE identifies a specific vulnerability in Sails.js versions prior to v1.0.0-46 that can lead to a denial of service attack.

What is CVE-2018-21036?

Sails.js before v1.0.0-46 allows attackers to cause a denial of service with a single request due to the absence of an error handler in sails-hook-sockets to manage an empty pathname in a WebSocket request.

The Impact of CVE-2018-21036

The vulnerability in CVE-2018-21036 can be exploited by malicious actors to disrupt the normal operation of affected Sails.js applications, potentially leading to service unavailability.

Technical Details of CVE-2018-21036

Sails.js before v1.0.0-46 is susceptible to a denial of service vulnerability due to inadequate handling of empty pathnames in WebSocket requests.

Vulnerability Description

The vulnerability arises from the lack of an error handler in sails-hook-sockets to address the presence of an empty pathname in WebSocket requests.

Affected Systems and Versions

Sails.js versions before v1.0.0-46

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a WebSocket request with an empty pathname, triggering a denial of service condition in the absence of proper error handling.

Mitigation and Prevention

To address CVE-2018-21036 and enhance security:

Immediate Steps to Take

Upgrade Sails.js to version v1.0.0-46 or newer to mitigate the vulnerability.
Implement proper error handling mechanisms in sails-hook-sockets to manage empty pathnames in WebSocket requests.

Long-Term Security Practices

Regularly update and patch Sails.js and its dependencies to prevent known vulnerabilities.

Patching and Updates

Stay informed about security advisories and updates from the Sails.js community to apply patches promptly.