Vulnerability · Published Feb 21, 2024 · Assigned by GitHub_M
CVE-2024-25124Fiber has Insecure CORS Configuration, Allowing Wildcard Origin with Credentials
Critical 9.4
In plain English
A critical-severity security flaw in fiber from gofiber. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 52% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Fiber is a web framework written in go. Prior to version 2.52.1, the CORS middleware allows for insecure configurations that could potentially expose the application to multiple CORS-related vulnerabilities. Specifically, it allows setting the Access-Control-Allow-Origin header to a wildcard (`*`) while also having the Access-Control-Allow-Credentials set to true, which goes against recommended security best practices. The impact of this misconfiguration is high as it can lead to unauthorized access to sensitive user data and expose the system to various types of attacks listed in the PortSwigger article linked in the references. Version 2.52.1 contains a patch for this issue. As a workaround, users may manually validate the CORS configurations in their implementation to ensure that they do not allow a wildcard origin when credentials are enabled. The browser fetch api, as well as browsers and utilities that enforce CORS policies, are not affected by this.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/gofiber/fiber/v2 | 2.52.1 | GHSA-fmg4-x8pw-hjhg |
| Go | github.com/gofiber/fiber/v2 | 2.52.1 | GO-2024-2574 |
Affected products (as reported)
Weakness: CWE-346, CWE-942 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
References
- https://github.com/gofiber/fiber/security/advisories/GHSA-fmg4-x8pw-hjhg x_refsource_CONFIRM
- https://github.com/gofiber/fiber/commit/f0cd3b44b086544a37886232d0530601f2406c23 x_refsource_MISC
- https://codeql.github.com/codeql-query-help/javascript/js-cors-misconfiguration-for-credentials x_refsource_MISC
- https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS/Errors/CORSNotSupportingCredentials x_refsource_MISC
- https://fetch.spec.whatwg.org/#cors-protocol-and-credentials x_refsource_MISC
- https://github.com/gofiber/fiber/releases/tag/v2.52.1 x_refsource_MISC
- https://saturncloud.io/blog/cors-cannot-use-wildcard-in-accesscontrolalloworigin-when-credentials-flag-is-true x_refsource_MISC
- http://blog.portswigger.net/2016/10/exploiting-cors-misconfigurations-for.html x_refsource_MISC