CVE-2024-56140
In affected versions a bug in Astro’s CSRF-protection middleware allows requests to bypass CSRF checks.
Does this matter?
Lower severity and a low EPSS score (0.22%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
- EPSS
- 0.22% probability · 12th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-352
- Affected
- astro/astro
- Source
- security-advisories@github.com
References
- https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#simple_requestsTechnical Description
- https://github.com/withastro/astro/blob/6031962ab5f56457de986eb82bd24807e926ba1b/packages/astro/src/core/app/middlewares.tsProduct
- https://github.com/withastro/astro/commit/e7d14c374b9d45e27089994a4eb72186d05514dePatch
- https://github.com/withastro/astro/security/advisories/GHSA-c4pw-33h3-35xwVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.