Vulnerability · Published Dec 18, 2024 · Assigned by GitHub_M
CVE-2024-56140Bypass of CSRF Middleware in Astro
Medium 5.9
In plain English
A medium-severity cross-site request forgery in astro from withastro. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Astro is a web framework for content-driven websites. In affected versions a bug in Astro’s CSRF-protection middleware allows requests to bypass CSRF checks. When the `security.checkOrigin` configuration option is set to `true`, Astro middleware will perform a CSRF check. However, a vulnerability exists that can bypass this security. A semicolon-delimited parameter is allowed after the type in `Content-Type`. Web browsers will treat a `Content-Type` such as `application/x-www-form-urlencoded; abc` as a `simple request` and will not perform preflight validation. In this case, CSRF is not blocked as expected. Additionally, the `Content-Type` header is not required for a request. This issue has been addressed in version 4.16.17 and all users are advised to upgrade. There are no known workarounds for this vulnerability.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | astro | 4.16.17 | GHSA-c4pw-33h3-35xw |
Affected products (as reported)
Weakness: CWE-352 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N
References
- https://github.com/withastro/astro/security/advisories/GHSA-c4pw-33h3-35xw x_refsource_CONFIRM
- https://github.com/withastro/astro/commit/e7d14c374b9d45e27089994a4eb72186d05514de x_refsource_MISC
- https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#simple_requests x_refsource_MISC
- https://github.com/withastro/astro/blob/6031962ab5f56457de986eb82bd24807e926ba1b/packages/astro/src/core/app/middlewares.ts x_refsource_MISC