CVE-2023-50714 : Exploit Details and Defense Strategies

A vulnerability has been identified in the Oauth2 PKCE implementation within yii2-authclient, affecting versions prior to 2.2.15. This CVE has a CVSSv3 base score of 6.8, indicating a medium severity issue.

Understanding CVE-2023-50714

This section will provide an overview of the CVE-2023-50714 vulnerability affecting yii2-authclient.

What is CVE-2023-50714?

The vulnerability in yii2-authclient allows a

downgrade attack

due to improper handling of the

authCodeVerifier

and potential risk for a

downgrade attack

when relying on PKCE for CSRF protection. Version 2.2.15 includes a patch to address this issue.

The Impact of CVE-2023-50714

This vulnerability could be exploited to perform SSRF attacks and improper verification of cryptographic signatures, leading to high confidentiality and integrity impacts.

Technical Details of CVE-2023-50714

In this section, we will delve into the technical aspects of the CVE-2023-50714 vulnerability in yii2-authclient.

Vulnerability Description

The vulnerability arises from the vulnerable Oauth2 PKCE implementation in yii2-authclient versions prior to 2.2.15.

Affected Systems and Versions

The vulnerability affects yii2-authclient versions below 2.2.15 across all compatible systems.

Exploitation Mechanism

Attackers can exploit this vulnerability to perform SSRF attacks and improper verification of cryptographic signatures, impacting confidentiality and integrity.

Mitigation and Prevention

Here we will discuss the mitigation strategies and best practices to prevent exploitation of CVE-2023-50714.

Immediate Steps to Take

Users are strongly advised to update yii2-authclient to version 2.2.15 or higher to mitigate the risk of exploitation.

Long-Term Security Practices

Implementing secure coding practices, regular security audits, and keeping software up-to-date can enhance overall security posture.

Patching and Updates

Stay informed about security patches and updates released by the vendor to address vulnerabilities promptly.