CVE-2021-22964
High
Description
A redirect vulnerability in the `fastify-static` module version >= 4.2.4 and < 4.4.1 allows remote attackers to redirect Mozilla Firefox users to arbitrary websites via a double slash `//` followed by a domain: `http://localhost:3000//a//youtube.com/%2e%2e%2f%2e%2e`.A DOS vulnerability is possible if the URL contains invalid characters `curl --path-as-is "http://localhost:3000//^/.."`The issue shows up on all the `fastify-static` applications that set `redirect: true` option. By default, it is `false`.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Fastify-static
PublishedOct 14, 2021
First seenOct 14, 2021
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Update
- fastify fastify-static4.4.1 or later
- fastify-static4.4.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| fastify fastify-static | 4.2.4 ≤ v < 4.4.1 | 4.4.1 |
| fastify-staticnpm | 4.2.4 ≤ v < 4.4.1 | 4.4.1 |
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