PT-2021-15300 · Unknown · Fastify-Static

Drstrnegth · Published 2021-10-05 · Updated 2021-10-20 · CVE-2021-22963

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions fastify-static versions prior to 4.2.4

Description A redirect issue in the fastify-static module allows remote attackers to redirect users to arbitrary websites via a double slash // followed by a domain. The issue affects fastify-static applications that have the redirect: true option set. By default, this option is false.

Recommendations For versions prior to 4.2.4, update to fastify-static version 4.2.4 or later to resolve the issue. As a temporary workaround, consider using the rewriteUrl server option to sanitize input URLs if updating is not an option.

Exploit

Fix

Open Redirect

Weakness Enumeration

CWE-601

Related Identifiers

CVE-2021-22963

GHSA-P6VG-P826-QP3V

Affected Products

Fastify-Static

References · 7

• 🔥 https://hackerone.com/reports/1354255 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-22963 · Security Note
• https://osv.dev/vulnerability/GHSA-p6vg-p826-qp3v · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-22963 · Vendor Advisory
• https://github.com/fastify/fastify-static · Note
• https://github.com/fastify/fastify-static/security/advisories/GHSA-p6vg-p826-qp3v · Note
• https://t.me/cibsecurity/30567 · Telegram Post