cvelistv5 - cve-2024-56140

CVE-2024-56140 (GCVE-0-2024-56140)

Vulnerability from cvelistv5

Published

2024-12-18 20:41

Modified

2024-12-18 21:03

Severity ?

5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N

CWE

CWE-352 - Cross-Site Request Forgery (CSRF)

Summary

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.

References

▼	URL	Tags
	security-advisories@github.com	https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#simple_requests
	security-advisories@github.com	https://github.com/withastro/astro/blob/6031962ab5f56457de986eb82bd24807e926ba1b/packages/astro/src/core/app/middlewares.ts
	security-advisories@github.com	https://github.com/withastro/astro/commit/e7d14c374b9d45e27089994a4eb72186d05514de
	security-advisories@github.com	https://github.com/withastro/astro/security/advisories/GHSA-c4pw-33h3-35xw

Impacted products

	Vendor	Product	Version
	withastro	astro	Version: < 4.16.17

Show details on NVD website

JSON

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ghsa-c4pw-33h3-35xw

Vulnerability from github

Published

2024-12-18 15:02

Modified

2024-12-18 21:52

Severity ?

5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N

Summary

Atro CSRF Middleware Bypass (security.checkOrigin)

Details

Summary

A bug in Astro’s CSRF-protection middleware allows requests to bypass CSRF checks.

Details

When the security.checkOrigin configuration option is set to true, Astro middleware will perform a CSRF check. (Source code: https://github.com/withastro/astro/blob/6031962ab5f56457de986eb82bd24807e926ba1b/packages/astro/src/core/app/middlewares.ts)

For example, with the following Astro configuration:

```js // astro.config.mjs import { defineConfig } from 'astro/config'; import node from '@astrojs/node';

export default defineConfig({ output: 'server', security: { checkOrigin: true }, adapter: node({ mode: 'standalone' }), }); ```

A request like the following would be blocked if made from a different origin:

js // fetch API or <form action="https://test.example.com/" method="POST"> fetch('https://test.example.com/', { method: 'POST', credentials: 'include', body: 'a=b', headers: { 'Content-Type': 'application/x-www-form-urlencoded' }, }); // => Cross-site POST form submissions are forbidden

However, a vulnerability exists that can bypass this security.

Pattern 1: Requests with a semicolon after the `Content-Type`

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.

js fetch('https://test.example.com', { method: 'POST', credentials: 'include', body: 'test', headers: { 'Content-Type': 'application/x-www-form-urlencoded; abc' }, }); // => Server-side functions are executed (Response Code 200).

Pattern 2: Request without `Content-Type` header

The Content-Type header is not required for a request. The following examples are sent without a Content-Type header, resulting in CSRF.

```js // Pattern 2.1 Request without body fetch('http://test.example.com', { method: 'POST', credentials: 'include' });

// Pattern 2.2 Blob object without type fetch('https://test.example.com', { method: 'POST', credentials: 'include', body: new Blob(['a=b'], {}), }); ```

Impact

Bypass CSRF protection implemented with CSRF middleware.

[!Note] Even with credentials: 'include', browsers may not send cookies due to third-party cookie blocking. This feature depends on the browser version and settings, and is for privacy protection, not as a CSRF measure.

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "astro"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.16.17"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-56140"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-352"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-12-18T15:02:37Z",
    "nvd_published_at": "2024-12-18T21:15:08Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nA bug in Astro\u2019s CSRF-protection middleware allows requests to bypass CSRF checks.\n\n### Details\n\nWhen the `security.checkOrigin` configuration option is set to `true`, Astro middleware will perform a CSRF check. (Source code: https://github.com/withastro/astro/blob/6031962ab5f56457de986eb82bd24807e926ba1b/packages/astro/src/core/app/middlewares.ts)\n\nFor example, with the following Astro configuration:\n\n```js\n// astro.config.mjs\nimport { defineConfig } from \u0027astro/config\u0027;\nimport node from \u0027@astrojs/node\u0027;\n\nexport default defineConfig({\n\toutput: \u0027server\u0027,\n\tsecurity: { checkOrigin: true },\n\tadapter: node({ mode: \u0027standalone\u0027 }),\n});\n```\n\nA request like the following would be blocked if made from a different origin:\n\n```js\n// fetch API or \u003cform action=\"https://test.example.com/\" method=\"POST\"\u003e\nfetch(\u0027https://test.example.com/\u0027, {\n\tmethod: \u0027POST\u0027,\n\tcredentials: \u0027include\u0027,\n\tbody: \u0027a=b\u0027,\n\theaders: { \u0027Content-Type\u0027: \u0027application/x-www-form-urlencoded\u0027 },\n});\n// =\u003e Cross-site POST form submissions are forbidden\n```\n\nHowever, a vulnerability exists that can bypass this security.\n\n#### Pattern 1: Requests with a semicolon after the `Content-Type`\n\nA semicolon-delimited parameter is allowed after the type in `Content-Type`.\n\nWeb browsers will treat a `Content-Type` such as `application/x-www-form-urlencoded; abc` as a [simple request](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#simple_requests) and will not perform preflight validation. In this case, CSRF is not blocked as expected.\n\n```js\nfetch(\u0027https://test.example.com\u0027, {\n\tmethod: \u0027POST\u0027,\n\tcredentials: \u0027include\u0027,\n\tbody: \u0027test\u0027,\n\theaders: { \u0027Content-Type\u0027: \u0027application/x-www-form-urlencoded; abc\u0027 },\n});\n// =\u003e Server-side functions are executed (Response Code 200).\n```\n\n#### Pattern 2: Request without `Content-Type` header\n\nThe `Content-Type` header is not required for a request. The following examples are sent without a `Content-Type` header, resulting in CSRF.\n\n```js\n// Pattern 2.1 Request without body\nfetch(\u0027http://test.example.com\u0027, { method: \u0027POST\u0027, credentials: \u0027include\u0027 });\n\n// Pattern 2.2 Blob object without type\nfetch(\u0027https://test.example.com\u0027, {\n\tmethod: \u0027POST\u0027,\n\tcredentials: \u0027include\u0027,\n\tbody: new Blob([\u0027a=b\u0027], {}),\n});\n```\n\n### Impact\n\nBypass CSRF protection implemented with CSRF middleware.\n\n\u003e [!Note]\n\u003e Even with `credentials: \u0027include\u0027`, browsers may not send cookies due to third-party cookie blocking. This feature depends on the browser version and settings, and is for privacy protection, not as a CSRF measure.\n",
  "id": "GHSA-c4pw-33h3-35xw",
  "modified": "2024-12-18T21:52:48Z",
  "published": "2024-12-18T15:02:37Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/withastro/astro/security/advisories/GHSA-c4pw-33h3-35xw"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-56140"
    },
    {
      "type": "WEB",
      "url": "https://github.com/withastro/astro/commit/e7d14c374b9d45e27089994a4eb72186d05514de"
    },
    {
      "type": "WEB",
      "url": "https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#simple_requests"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/withastro/astro"
    },
    {
      "type": "WEB",
      "url": "https://github.com/withastro/astro/blob/6031962ab5f56457de986eb82bd24807e926ba1b/packages/astro/src/core/app/middlewares.ts"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Atro CSRF Middleware Bypass (security.checkOrigin)"
}

fkie_cve-2024-56140

Vulnerability from fkie_nvd

Published

2024-12-18 21:15

Modified

2024-12-18 21:15

Severity ?

5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N

Summary

References

▼	URL	Tags
	security-advisories@github.com	https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#simple_requests
	security-advisories@github.com	https://github.com/withastro/astro/blob/6031962ab5f56457de986eb82bd24807e926ba1b/packages/astro/src/core/app/middlewares.ts
	security-advisories@github.com	https://github.com/withastro/astro/commit/e7d14c374b9d45e27089994a4eb72186d05514de
	security-advisories@github.com	https://github.com/withastro/astro/security/advisories/GHSA-c4pw-33h3-35xw

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Astro is a web framework for content-driven websites. In affected versions a bug in Astro\u2019s 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."
    },
    {
      "lang": "es",
      "value": "Astro es un framework para sitios web basados en contenido. En las versiones afectadas, un error en el middleware de protecci\u00f3n CSRF de Astro permite que las solicitudes eludan las comprobaciones CSRF. Cuando la opci\u00f3n de configuraci\u00f3n `security.checkOrigin` se establece en `true`, el middleware Astro realizar\u00e1 una comprobaci\u00f3n CSRF. Sin embargo, existe una vulnerabilidad que puede eludir esta seguridad. Se permite un par\u00e1metro delimitado por punto y coma despu\u00e9s del tipo en `Content-Type`. Los navegadores web tratar\u00e1n un `Content-Type` como `application/x-www-form-urlencoded; abc` como una `solicitud simple` y no realizar\u00e1n una validaci\u00f3n previa. En este caso, CSRF no se bloquea como se esperaba. Adem\u00e1s, el encabezado `Content-Type` no es necesario para una solicitud. Este problema se ha solucionado en la versi\u00f3n 4.16.17 y se recomienda a todos los usuarios que actualicen. No existen workarounds conocidos para esta vulnerabilidad."
    }
  ],
  "id": "CVE-2024-56140",
  "lastModified": "2024-12-18T21:15:08.353",
  "metrics": {
    "cvssMetricV31": [
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        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 4.2,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2024-12-18T21:15:08.353",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#simple_requests"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/withastro/astro/blob/6031962ab5f56457de986eb82bd24807e926ba1b/packages/astro/src/core/app/middlewares.ts"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/withastro/astro/commit/e7d14c374b9d45e27089994a4eb72186d05514de"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/withastro/astro/security/advisories/GHSA-c4pw-33h3-35xw"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-352"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

Action not permitted

CVE-2024-56140 (GCVE-0-2024-56140)

Vulnerability from cvelistv5

ghsa-c4pw-33h3-35xw

Vulnerability from github

Summary

Details

Pattern 1: Requests with a semicolon after the Content-Type

Pattern 2: Request without Content-Type header

Impact

fkie_cve-2024-56140

Vulnerability from fkie_nvd

Tags

Sightings

Nomenclature

Pattern 1: Requests with a semicolon after the `Content-Type`

Pattern 2: Request without `Content-Type` header