CVE-2021-43803: Unexpected server crash in Next.js
First published: Tue Dec 07 2021(Updated: )
Next.js is a React framework. In versions of Next.js prior to 12.0.5 or 11.1.3, invalid or malformed URLs could lead to a server crash. In order to be affected by this issue, the deployment must use Next.js versions above 11.1.0 and below 12.0.5, Node.js above 15.0.0, and next start or a custom server. Deployments on Vercel are not affected, along with similar environments where invalid requests are filtered before reaching Next.js. Versions 12.0.5 and 11.1.3 contain patches for this issue.
Credit: security-advisories@github.com security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| All of | ||
| Nodejs Node.js | >=15.0.0 | |
| Vercel Next.js | >=11.1.0<11.1.3 | |
| Vercel Next.js | >=12.0.0<12.0.5 | |
| npm/next | >=0.9.9<11.1.3 | 11.1.3 |
| npm/next | >=12.0.0<12.0.5 | 12.0.5 |
| All of | ||
| Any of | ||
| Vercel Next.js | >=11.1.0<11.1.3 | |
| Vercel Next.js | >=12.0.0<12.0.5 | |
| Nodejs Node.js | >15.0.0 |
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Reference Links
- https://github.com/vercel/next.js/commit/6d98b4fb4315dec1badecf0e9bdc212a4272b264
- https://github.com/vercel/next.js/pull/32080
- https://github.com/vercel/next.js/releases/tag/v11.1.3
- https://github.com/vercel/next.js/releases/v12.0.5
- https://github.com/vercel/next.js/security/advisories/GHSA-25mp-g6fv-mqxx
- https://nvd.nist.gov/vuln/detail/CVE-2021-43803
- https://github.com/advisories/GHSA-25mp-g6fv-mqxx (Advisory)
Frequently Asked Questions
What is CVE-2021-43803?
CVE-2021-43803 is a vulnerability in Next.js versions prior to 12.0.5 or 11.1.3 that could lead to a server crash when using invalid or malformed URLs.
Which versions of Next.js are affected by CVE-2021-43803?
Next.js versions above 11.1.0 and below 12.0.5 are affected by CVE-2021-43803.
Which versions of Node.js are affected by CVE-2021-43803?
Node.js versions above 15.0.0 are affected by CVE-2021-43803.
How can I mitigate the risk of CVE-2021-43803?
To mitigate the risk of CVE-2021-43803, update Next.js to version 12.0.5 or 11.1.3 and Node.js to a version below 15.0.0.
Where can I find more information about CVE-2021-43803?
You can find more information about CVE-2021-43803 in the following references: [Link1], [Link2], [Link3].
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