Vulnerability · Published Oct 14, 2021 · Assigned by hackerone

CVE-2021-22964

High 8.8

In plain English

A high-severity uncontrolled resource consumption in https://github.com/fastify/fastify-static. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 64% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)8.8High

Exploit odds (30 days)1.0%top 36.4% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official 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`.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	fastify-static	4.4.1	GHSA-pgh6-m65r-2rhq

Affected products (as reported)

Vendor	Product	Versions
n/a	https://github.com/fastify/fastify-static	Affected >= v4.2.4, Fixed v4.4.1

Weakness: CWE-400

References

https://hackerone.com/reports/1361804 x_refsource_MISC