GHSA-F8MP-X433-5WPF

Vulnerability from github – Published: 2024-01-03 21:26 – Updated: 2024-01-03 21:26
VLAI?
Summary
Arbitrary remote code execution within `wrangler dev` Workers sandbox
Details

Impact

The V8 inspector intentionally allows arbitrary code execution within the Workers sandbox for debugging. wrangler dev would previously start an inspector server listening on all network interfaces. This would allow an attacker on the local network to connect to the inspector and run arbitrary code. Additionally, the inspector server did not validate Origin/Host headers, granting an attacker that can trick any user on the local network into opening a malicious website the ability to run code. If wrangler dev --remote was being used, an attacker could access production resources if they were bound to the worker.

Patches

This issue was fixed in wrangler@3.19.0 and wrangler@2.20.2. Whilst wrangler dev's inspector server listens on local interfaces by default as of wrangler@3.16.0, an SSRF vulnerability in miniflare allowed access from the local network until wrangler@3.18.0. wrangler@3.19.0 and wrangler@2.20.2 introduced validation for the Origin/Host headers.

Workarounds

Unfortunately, Wrangler doesn't provide any configuration for which host that inspector server should listen on. Please upgrade to at least wrangler@3.16.0, and configure Wrangler to listen on local interfaces instead with wrangler dev --ip 127.0.0.1 to prevent SSRF. This removes the local network as an attack vector, but does not prevent an attack from visiting a malicious website.

References

  • https://github.com/cloudflare/workers-sdk/issues/4430
  • https://github.com/cloudflare/workers-sdk/pull/4437
  • https://github.com/cloudflare/workers-sdk/pull/4535
  • https://github.com/cloudflare/workers-sdk/pull/4550
Severity ?
9.3 (Critical)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "wrangler"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.0.0"
            },
            {
              "fixed": "3.19.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "wrangler"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.0.0"
            },
            {
              "fixed": "2.20.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-7080"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-269"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-01-03T21:26:50Z",
    "nvd_published_at": "2023-12-29T12:15:47Z",
    "severity": "CRITICAL"
  },
  "details": "### Impact\nThe V8 inspector intentionally allows arbitrary code execution within the Workers sandbox for debugging. `wrangler dev` would previously start an inspector server listening on all network interfaces. This would allow an attacker on the local network to connect to the inspector and run arbitrary code. Additionally, the inspector server did not validate `Origin`/`Host` headers, granting an attacker that can trick any user on the local network into opening a malicious website the ability to run code. If `wrangler dev --remote` was being used, an attacker could access production resources if they were bound to the worker.\n\n### Patches\nThis issue was fixed in `wrangler@3.19.0` and `wrangler@2.20.2`. Whilst `wrangler dev`\u0027s inspector server listens on local interfaces by default as of `wrangler@3.16.0`, an [SSRF vulnerability in `miniflare`](https://github.com/cloudflare/workers-sdk/security/advisories/GHSA-fwvg-2739-22v7) allowed access from the local network until `wrangler@3.18.0`. `wrangler@3.19.0` and `wrangler@2.20.2` introduced validation for the `Origin`/`Host` headers.\n\n### Workarounds\nUnfortunately, Wrangler doesn\u0027t provide any configuration for which host that inspector server should listen on. Please upgrade to at least `wrangler@3.16.0`, and configure Wrangler to listen on local interfaces instead with `wrangler dev --ip 127.0.0.1` to prevent SSRF. This removes the local network as an attack vector, but does not prevent an attack from visiting a malicious website.\n\n### References\n- https://github.com/cloudflare/workers-sdk/issues/4430\n- https://github.com/cloudflare/workers-sdk/pull/4437\n- https://github.com/cloudflare/workers-sdk/pull/4535\n- https://github.com/cloudflare/workers-sdk/pull/4550\n",
  "id": "GHSA-f8mp-x433-5wpf",
  "modified": "2024-01-03T21:26:50Z",
  "published": "2024-01-03T21:26:50Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/cloudflare/workers-sdk/security/advisories/GHSA-f8mp-x433-5wpf"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-7080"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cloudflare/workers-sdk/issues/4430"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cloudflare/workers-sdk/pull/4437"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cloudflare/workers-sdk/pull/4535"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cloudflare/workers-sdk/pull/4550"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cloudflare/workers-sdk/commit/05b1bbd2f5b8e60268e30c276067c3a3ae1239cf"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cloudflare/workers-sdk/commit/29df8e17545bf3926b6d61678b596be809d40c6d"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cloudflare/workers-sdk/commit/49a469601adaa9eb9e1f2d6de197c1979d5c6c1b"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cloudflare/workers-sdk/commit/63708a94fb7a055bf15fa963f2d598b47b11d3c0"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/cloudflare/workers-sdk"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Arbitrary remote code execution within `wrangler dev` Workers sandbox"
}


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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.