What is the CVSS score of CVE-2021-22964?

CVE-2021-22964 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:H. EPSS exploitation probability: 1.0%.

Is there a public PoC exploit available for CVE-2021-22964?

Yes, a public proof-of-concept exploit is available for CVE-2021-22964. Prioritise patching immediately. EPSS: 1.0%.

Is there a patch available for CVE-2021-22964?

Yes, a patch is available for CVE-2021-22964. Update the affected software to the latest version immediately.

Fastify Static CVE-2021-22964

Q: Which versions of Fastify Static are affected by CVE-2021-22964?

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.. A patch is available.

HIGH

Uncontrolled Resource Consumption (CWE-400)

2021-10-14 support@hackerone.com

Mozilla Denial Of Service Fastify Static

8.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.8 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

High

Lifecycle Timeline

CVE Published

Oct 14, 2021 - 15:15 nvd

HIGH 8.8

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

1 npm packages depend on fastify-static (1 direct, 0 indirect)

Ecosystem-wide dependent count for version 4.2.4.

DescriptionNVD

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.

AnalysisAI

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. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Uncontrolled Resource Consumption (CWE-400), which allows attackers to cause denial of service by exhausting system resources. 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 products include: Fastify Fastify-Static.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Implement rate limiting, set resource quotas, validate input sizes, use timeouts.