CVE-2018-1000211 Explained : Impact and Mitigation

Doorkeeper version 4.2.0 and later has a vulnerability related to Incorrect Access Control in the Token revocation API's authorized method, potentially leading to access token leakage.

Understanding CVE-2018-1000211

This CVE involves a security issue in Doorkeeper versions 4.2.0 and above, impacting the revocation of access tokens for public OAuth apps.

What is CVE-2018-1000211?

The vulnerability in the Token revocation API's authorized method in Doorkeeper versions 4.2.0 and later can result in access tokens not being properly revoked for public OAuth apps. This oversight may lead to unintentional access leakage until the tokens expire.

The Impact of CVE-2018-1000211

The vulnerability can have the following consequences:

Unauthorized access to sensitive information
Potential data breaches due to leaked access tokens

Technical Details of CVE-2018-1000211

Doorkeeper version 4.2.0 and later is affected by the following:

Vulnerability Description

The vulnerability lies in the Token revocation API's authorized method, causing access tokens not to be revoked for public OAuth apps, resulting in access leakage.

Affected Systems and Versions

Product: N/A
Vendor: N/A
Versions: 4.2.0 and later

Exploitation Mechanism

The vulnerability allows attackers to exploit the incorrect access control in the Token revocation API, enabling them to access sensitive information until the tokens expire.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of this vulnerability.

Immediate Steps to Take

Update Doorkeeper to the latest patched version
Monitor access tokens and revoke any suspicious ones

Long-Term Security Practices

Regularly audit and review access control mechanisms
Implement proper token management practices to prevent leakage

Patching and Updates

Apply security patches provided by Doorkeeper promptly to mitigate the vulnerability