CVE-2020-15223 : Security Advisory and Response

In ORY Fosite (the security first OAuth2 & OpenID Connect framework for Go) before version 0.34.0, the

TokenRevocationHandler

ignores errors coming from the storage. This can lead to unexpected 200 status codes indicating successful revocation while the token is still valid. Whether an attacker can use this for her advantage depends on the ability to trigger errors in the store. This is fixed in version 0.34.0.

Understanding CVE-2020-15223

In this section, we will delve into the details of the vulnerability and its impact.

What is CVE-2020-15223?

CVE-2020-15223 is a vulnerability in ORY Fosite that allows the

TokenRevocationHandler

to ignore errors from storage, potentially leading to misleading successful revocation status.

The Impact of CVE-2020-15223

The impact of this vulnerability is rated as HIGH with a CVSS base score of 8. It can result in high confidentiality and integrity impacts without requiring privileges.

Technical Details of CVE-2020-15223

Let's explore the technical aspects of this CVE in more detail.

Vulnerability Description

The

TokenRevocationHandler

in ORY Fosite fails to handle errors from storage, leading to incorrect successful revocation indications.

Affected Systems and Versions

Product: fosite
Vendor: ory
Versions Affected: < 0.34.0

Exploitation Mechanism

Attackers can exploit this vulnerability by triggering errors in the storage to achieve successful token revocation status.

Mitigation and Prevention

Discover the steps to mitigate and prevent the exploitation of CVE-2020-15223.

Immediate Steps to Take

Upgrade ORY Fosite to version 0.34.0 or higher to apply the fix.
Monitor token revocation activities for unexpected behavior.

Long-Term Security Practices

Regularly update and patch ORY Fosite to address security vulnerabilities.
Implement proper error handling mechanisms in the application to prevent similar issues.
Conduct security audits to identify and address potential vulnerabilities.
Educate developers on secure coding practices.

Patching and Updates

Ensure timely application of patches and updates to maintain the security of ORY Fosite.