CVE-2021-21310: Next auth Token Verification Bug Vulnerability
LOWCVE-2021-21310 is a LOW token verification bug vulnerability (CWE-290: Authentication Bypass by Spoofing) affecting Next auth libraries in the npm ecosystem. The issue involves token verification bug in next-auth. Remediation is available by upgrading affected packages to version 3.3.0.
CVE-2021-21310 at a Glance
How to Fix CVE-2021-21310
To remediate this vulnerability, upgrade all affected Next auth dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
npm install next-auth@3.3.0
Run the following command in your project directory to verify that all resolved dependencies use the patched release:
npm ls next-auth
How to Check if You Are Affected
To determine whether your Node.js application is affected by CVE-2021-21310, inspect your project dependencies using npm:
npm ls next-auth
Analyze the terminal output to locate any version of Next auth in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.3.0), your application is affected.
Note: The npm ls next-auth command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-290: Authentication Bypass by Spoofing, where this attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks. In Next auth, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2021-21310 Affected Next auth Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
next-auth
|
npm |
< 3.3.0
|
3.3.0
|
References
Frequently Asked Questions
What is CVE-2021-21310?
Which Next auth versions are affected?
What version fixes CVE-2021-21310?
Is next-auth affected?
What CWE is associated with CVE-2021-21310?
How can I check npm dependencies for CVE-2021-21310?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-pg53-56cg-4m8q",
"modified" : "2021-02-22T20:43:03Z",
"published" : "2021-02-11T21:36:24Z",
"aliases" : [ "CVE-2021-21310" ],
"summary" : "Token verification bug in next-auth",
"details" : "### Impact\n\nImplementations using the **Prisma database adapter** with the **Email provider** **are impacted**.\n\nImplementations using the Prisma database adapter that are not using the Email provider are not impacted.\nImplementations using the default database adapter (TypeORM) with the Email provider are not impacted.\nImplementations not using a database are not impacted.\n\n### Patches\n\nThis issue is fixed in 3.3.0 and newer versions.\n\n### Workarounds\n\nThose not able to upgrade can alternatively disable the Email provider as a workaround.\n\n### Description\n\nThe Prisma database adapter was checking the verification token but not the identifier (the email address associated with the token). This made it possible to use a valid token assigned to one user, to sign in as another user when using the Prima adapter in conjunction with the Email provider. The defect is specific to the community-supported Prisma database adapter in versions <3.3.0 and is not present in the default database adapter (TypeORM).\n\n*Note: The current community-supported adapter was not developed by Prisma.*\n\nThe defect was a problem in the implementation of verification function the adapter and is not directly related to Prisma.\n\nThe flaw may exist in other third party database adapters that do not check both the identifier and token values.\n\nThe design of the database adapter API may be revised in future to help reduce the likelyhood of similar defects.\n\n### Timeline\n\nOn Monday (2021-02-08) we were notified via responsible disclosure by Alessandro Angelino (@AlessandroA) of a flaw in the implementation of the Prisma database adapter included with NextAuth.js. A detailed write up and proof of concept were provided.\n\nThe following day (2021-02-09) we published a fix in v3.3.0 and confirmed through internal testing, and with Alessandro, that the issue was resolved in the new release and prompted users to upgrade.\n\nOn 2021-02-10 we received a CVE ID and published this advisory within a few hours of notification.\n\nWe would like to thank Alessandro for using responsible disclose to allow us to address the issue promptly and publish this advisory once an update was available that resolved the issue and Balázs Orbán (@balazsorban44) for facilitating a timely release of the fix.",
"severity" : [ ],
"affected" : [ {
"package" : {
"ecosystem" : "npm",
"name" : "next-auth"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "3.3.0"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/nextauthjs/next-auth/security/advisories/GHSA-pg53-56cg-4m8q"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-21310"
}, {
"type" : "WEB",
"url" : "https://github.com/nextauthjs/next-auth/releases/tag/v3.3.0"
}, {
"type" : "WEB",
"url" : "https://www.npmjs.com/package/next-auth"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-290" ],
"severity" : "LOW",
"github_reviewed" : true,
"github_reviewed_at" : "2021-02-11T21:36:12Z",
"nvd_published_at" : "2021-02-11T22:15:00Z"
}
}