Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS1wNnZnLXA4MjYtcXAzds0WKg

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 [email protected]

Workarounds

If updating is not an option, you can sanitize the input URLs using the rewriteUrl server option.

References

• Bug founder: drstrnegth
• hackerone Report

For more information

If you have any questions or comments about this advisory:

• Open an issue in fastify-static
• Contact the security team

Permalink: https://github.com/advisories/GHSA-p6vg-p826-qp3v
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1wNnZnLXA4MjYtcXAzds0WKg
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: over 2 years ago
Updated: about 1 year ago

CVSS Score: 6.1
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Identifiers: GHSA-p6vg-p826-qp3v, CVE-2021-22963
References:

• https://github.com/fastify/fastify-static/security/advisories/GHSA-p6vg-p826-qp3v
• https://nvd.nist.gov/vuln/detail/CVE-2021-22963
• https://hackerone.com/reports/1354255
• https://github.com/advisories/GHSA-p6vg-p826-qp3v

Repository: https://github.com/fastify/fastify-static
Blast Radius: 21.9

Affected Packages