CVE-2017-17068 : Security Advisory and Response

A security flaw in the Auth0 auth0.js library prior to version 8.12 allows attackers to access authenticated users' tokens and perform actions on their behalf.

Understanding CVE-2017-17068

This CVE involves a cross-origin vulnerability in the Auth0 library that can be exploited to manipulate user tokens.

What is CVE-2017-17068?

This vulnerability in Auth0's auth0.js library, versions below 8.12, permits attackers to acquire user tokens and execute actions on behalf of authenticated users.

The Impact of CVE-2017-17068

Attackers can potentially access sensitive user data and perform unauthorized actions.
Websites or applications using popup callback pages with auth0.popup.callback() are particularly vulnerable.

Technical Details of CVE-2017-17068

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The flaw in Auth0's auth0.js library allows attackers to exploit cross-origin vulnerabilities to access user tokens and impersonate users.

Affected Systems and Versions

Auth0 auth0.js library versions earlier than 8.12 are vulnerable.
Websites or applications using popup callback pages are at risk.

Exploitation Mechanism

Attackers can exploit the vulnerability by leveraging the auth0.popup.callback() function in conjunction with popup callback pages to gain access to user tokens.

Mitigation and Prevention

Protecting systems from CVE-2017-17068 requires immediate actions and long-term security measures.

Immediate Steps to Take

Upgrade Auth0 auth0.js library to version 8.12 or above.
Avoid using popup callback pages or implement additional security measures.

Long-Term Security Practices

Regularly monitor and update security protocols.
Conduct security audits to identify and address vulnerabilities proactively.

Patching and Updates

Stay informed about security bulletins and patches from Auth0.
Implement timely updates to ensure protection against known vulnerabilities.