CVE-2023-27490: Missing proper state, nonce and PKCE checks for OAuth authentication in next-auth
First published: Thu Mar 09 2023(Updated: )
NextAuth.js is an open source authentication solution for Next.js applications. `next-auth` applications using OAuth provider versions before `v4.20.1` have been found to be subject to an authentication vulnerability. A bad actor who can read traffic on the victim's network or who is able to social engineer the victim to click a manipulated login link could intercept and tamper with the authorization URL to **log in as the victim**, bypassing the CSRF protection. This is due to a partial failure during a compromised OAuth session where a session code is erroneously generated. This issue has been addressed in version 4.20.1. Users are advised to upgrade. Users unable to upgrade may using Advanced Initialization, manually check the callback request for state, pkce, and nonce against the provider configuration to prevent this issue. See the linked GHSA for details.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Nextauth.js Next-auth | <4.20.1 |
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Reference Links
- https://authjs.dev/reference/core/providers#checks
- https://danielfett.de/2020/05/16/pkce-vs-nonce-equivalent-or-not/
- https://github.com/nextauthjs/next-auth/security/advisories/GHSA-7r7x-4c4q-c4qf
- https://next-auth.js.org/configuration/initialization#advanced-initialization
- https://next-auth.js.org/configuration/providers/oauth
- https://security.netapp.com/advisory/ntap-20230420-0006/
- https://www.rfc-editor.org/rfc/rfc6749#section-10.12
Frequently Asked Questions
What is NextAuth.js?
NextAuth.js is an open source authentication solution for Next.js applications.
What is the vulnerability with CVE-2023-27490?
Applications using NextAuth.js with OAuth provider versions before v4.20.1 are subject to an authentication vulnerability.
How severe is CVE-2023-27490?
The severity of CVE-2023-27490 is high, with a CVSS score of 8.8.
How can I fix CVE-2023-27490?
To fix CVE-2023-27490, update NextAuth.js to version 4.20.1 or newer.
Where can I find more information about CVE-2023-27490?
You can find more information about CVE-2023-27490 on the NextAuth.js GitHub security advisory page: https://github.com/nextauthjs/next-auth/security/advisories/GHSA-7r7x-4c4q-c4qf
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