CVE-2019-11358 : Security Advisory and Response

CVE-2019-11358 is a vulnerability found in versions of jQuery prior to 3.4.0, affecting various products like Drupal and Backdrop CMS. The vulnerability is related to how the jQuery.extend() function handles Object.prototype pollution.

Understanding CVE-2019-11358

This CVE highlights a security flaw in older versions of jQuery that could lead to Object.prototype pollution when certain conditions are met.

What is CVE-2019-11358?

CVE-2019-11358 is a vulnerability in jQuery versions before 3.4.0, impacting products like Drupal and Backdrop CMS. It arises from improper handling of the jQuery.extend() function, potentially leading to Object.prototype pollution.

The Impact of CVE-2019-11358

The vulnerability allows for the extension of the native Object.prototype when an unsanitized source object with an enumerable proto property is utilized. This could result in security risks and potential exploitation by malicious actors.

Technical Details of CVE-2019-11358

This section delves into the specifics of the vulnerability.

Vulnerability Description

The vulnerability in jQuery versions prior to 3.4.0 stems from the mishandling of the jQuery.extend() function, leading to Object.prototype pollution.

Affected Systems and Versions

Vendor: N/A
Product: N/A
Versions: All versions prior to 3.4.0 are affected.

Exploitation Mechanism

The vulnerability can be exploited when an unsanitized source object with an enumerable proto property is used, allowing for the extension of the native Object.prototype.

Mitigation and Prevention

Protecting systems from CVE-2019-11358 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update jQuery to version 3.4.0 or later to mitigate the vulnerability.
Regularly monitor security advisories and patches for related products.

Long-Term Security Practices

Implement input sanitization to prevent Object.prototype pollution.
Conduct regular security audits and code reviews to identify and address vulnerabilities.

Patching and Updates

Ensure timely application of security patches and updates for all relevant software components.