CVE-2023-27490 : What You Need to Know

A security vulnerability has been identified in NextAuth.js OAuth provider versions before

v4.20.1

, impacting

next-auth

applications. The vulnerability could allow malicious actors to intercept and manipulate the authorization URL, potentially leading to unauthorized access as the victim. This CVE has been published on March 9, 2023.

Understanding CVE-2023-27490

This section provides insights into the nature and impact of CVE-2023-27490.

What is CVE-2023-27490?

CVE-2023-27490 relates to a lack of proper state, nonce, and PKCE (Proof Key for Code Exchange) checks for OAuth authentication in NextAuth.js. This oversight could result in unauthorized access for malicious actors.

The Impact of CVE-2023-27490

The vulnerability poses a high severity risk, with a base score of 8.1 (CVSS v3.1). It has high confidentiality and integrity impact, requiring user interaction for exploitation. Affected versions prior to

v4.20.1

are susceptible to session fixation and cross-site request forgery (CSRF) attacks.

Technical Details of CVE-2023-27490

This section delves into the specific technical aspects of the vulnerability.

Vulnerability Description

The vulnerability in NextAuth.js OAuth authentication before version

v4.20.1

enables attackers to intercept and manipulate the authorization URL, potentially logging in as the victim and bypassing CSRF protection due to erroneous session code generation.

Affected Systems and Versions

The issue impacts

next-auth

applications using OAuth provider versions earlier than

v4.20.1

. Specifically, versions before

4.20.1

are vulnerable to exploitation.

Exploitation Mechanism

Malicious actors could exploit this vulnerability by intercepting and tampering with the authorization URL, leveraging social engineering or network traffic interception to gain unauthorized access.

Mitigation and Prevention

This section outlines the steps users can take to mitigate the risk posed by CVE-2023-27490.

Immediate Steps to Take

Users are strongly advised to upgrade their

next-auth

applications to version

v4.20.1

or newer to address the vulnerability. Upgrading to the patched version will mitigate the risk of unauthorized access via OAuth authentication.

Long-Term Security Practices

In the long term, organizations should prioritize regular software updates and security patches to ensure their systems are protected against known vulnerabilities. Implementing robust security measures and staying informed about potential threats is crucial for maintaining a secure environment.

Patching and Updates

For users unable to immediately upgrade to version

4.20.1

, implementing Advanced Initialization and manually verifying state, pkce, and nonce in the callback request against the provider configuration can help mitigate the risk of exploitation. Refer to the provided references for detailed guidance on securing OAuth authentication in NextAuth.js.