CVE-2021-22963 – fastify-static

Package

Manager: npm
Name: fastify-static
Vulnerable Version: >=0 <4.2.4

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

EPSS: 0.00172 pctl0.38872

Details

URL Redirection to Untrusted Site ('Open Redirect') in fastify-static ### Impact A redirect vulnerability in the `fastify-static` module allows remote attackers to redirect Mozilla Firefox users to arbitrary websites via a double slash `//` followed by a domain: `http://localhost:3000//google.com/%2e%2e`. The issue shows up on all the `fastify-static` applications that set `redirect: true` option. By default, it is `false`. ### Patches The issue has been patched in `fastify-static@4.2.4` ### Workarounds If updating is not an option, you can sanitize the input URLs using the [`rewriteUrl`](https://www.fastify.io/docs/latest/Server/#rewriteurl) server option. ### References + Bug founder: drstrnegth + [hackerone Report](https://hackerone.com/reports/1354255) ### For more information If you have any questions or comments about this advisory: * Open an issue in [fastify-static](https://github.com/fastify/fastify-static) * Contact the [security team](https://github.com/fastify/fastify/blob/main/SECURITY.md#the-fastify-security-team)

Metadata

Created: 2021-10-05T20:24:49Z
Modified: 2021-10-21T15:01:19Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/10/GHSA-p6vg-p826-qp3v/GHSA-p6vg-p826-qp3v.json
CWE IDs: ["CWE-601"]
Alternative ID: GHSA-p6vg-p826-qp3v
Finding: F156
Auto approve: 1