CVE-2021-30151 Explained : Impact and Mitigation

Sidekiq through 5.1.3 and 6.x through 6.2.0 allows XSS via the queue name of the live-poll feature when Internet Explorer is used.

Understanding CVE-2021-30151

This CVE involves a cross-site scripting (XSS) vulnerability in Sidekiq versions 5.1.3 and 6.x up to 6.2.0 when the queue name of the live-poll feature is manipulated using Internet Explorer.

What is CVE-2021-30151?

CVE-2021-30151 is a security flaw in Sidekiq that enables attackers to execute malicious scripts within the context of a user's session when the vulnerable live-poll feature is accessed via Internet Explorer.

The Impact of CVE-2021-30151

Exploitation of this vulnerability could lead to unauthorized access to sensitive information, session hijacking, or other forms of cross-site scripting attacks on affected systems.

Technical Details of CVE-2021-30151

This section outlines the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability in Sidekiq versions 5.1.3 and 6.x up to 6.2.0 allows for XSS through the manipulation of the queue name in the live-poll feature, particularly in scenarios involving Internet Explorer.

Affected Systems and Versions

All versions of Sidekiq through 5.1.3 and from 6.x to 6.2.0 are impacted by this vulnerability when the live-poll feature is used with Internet Explorer.

Exploitation Mechanism

By crafting a malicious queue name within the live-poll feature and exploiting the vulnerability through Internet Explorer, an attacker can inject and execute arbitrary scripts within the application's context.

Mitigation and Prevention

In this section, we cover immediate steps to take and long-term security practices to mitigate the risks associated with CVE-2021-30151.

Immediate Steps to Take

Users and administrators are advised to update Sidekiq to a patched version to prevent exploitation of this vulnerability. It is essential to refrain from using Internet Explorer when interacting with the live-poll feature.

Long-Term Security Practices

Implementing secure coding practices, conducting regular security assessments, and staying informed about security updates are crucial for safeguarding against similar vulnerabilities in the future.

Patching and Updates

Regularly check for security advisories and updates from Sidekiq to ensure that the software remains secure and protected against potential threats.