GHSA-HR9R-8PHQ-5X8J

Vulnerability from github – Published: 2023-06-28 22:49 – Updated: 2023-07-03 18:39
VLAI?
Summary
OpenFGA vulnerable to denial of service due to circular relationship
Details

Overview

OpenFGA versions v1.1.0 and prior are vulnerable to a DoS attack when certain Check and ListObjects calls are executed against authorization models that contain circular relationship definitions.

Am I Affected?

You are affected by this vulnerability if you are using OpenFGA v1.1.0 or earlier, and if you are executing certain Check or ListObjects calls against a vulnerable authorization model. To see which of your models could be vulnerable to this attack, download OpenFGA v1.2.0 and run the following command: 

./openfga validate-models --datastore-engine <ENGINE> --datastore-uri <URI> | jq .[] | select(.Error | contains("loop"))

replacing the variables <ENGINE> and <URI> as needed.

Fix

Upgrade to v1.1.1.

Backward Compatibility

If you are not passing an invalid authorization model (as identified by running ./openfga validate-models) as a parameter of your Check and ListObjects calls, this upgrade is backwards compatible.

Otherwise, OpenFGA v1.1.1 will start returning HTTP 400 status codes on those calls.

Severity ?
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/openfga/openfga"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-35933"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-835"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-06-28T22:49:49Z",
    "nvd_published_at": "2023-06-26T20:15:10Z",
    "severity": "MODERATE"
  },
  "details": "### Overview\n\nOpenFGA versions v1.1.0 and prior are vulnerable to a DoS attack when certain Check and ListObjects calls are executed against authorization models that contain circular relationship definitions.\n\n### Am I Affected?\n\nYou are affected by this vulnerability if you are using OpenFGA v1.1.0 or earlier, and if you are executing certain [Check](https://openfga.dev/api/service#/Relationship%20Queries/Check) or [ListObjects](https://openfga.dev/api/service#/Relationship%20Queries/ListObjects) calls against a vulnerable authorization model. To see which of your models could be vulnerable to this attack, download OpenFGA v1.2.0 and run the following command: \n\n```\n./openfga validate-models --datastore-engine \u003cENGINE\u003e --datastore-uri \u003cURI\u003e | jq .[] | select(.Error | contains(\"loop\"))\n```\n\nreplacing the variables `\u003cENGINE\u003e` and `\u003cURI\u003e` as needed.\n\n### Fix\n\nUpgrade to v1.1.1.\n\n### Backward Compatibility\n\nIf you are not passing an invalid authorization model (as identified by running `./openfga validate-models`) as a parameter of your Check and ListObjects calls, this upgrade is backwards compatible. \n\nOtherwise, OpenFGA v1.1.1 will start returning HTTP 400 status codes on those calls.",
  "id": "GHSA-hr9r-8phq-5x8j",
  "modified": "2023-07-03T18:39:26Z",
  "published": "2023-06-28T22:49:49Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openfga/openfga/security/advisories/GHSA-hr9r-8phq-5x8j"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-35933"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openfga/openfga/commit/087ce392595f3c319ab3028b5089118ea4063452"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openfga/openfga"
    },
    {
      "type": "WEB",
      "url": "https://openfga.dev/api/service#/Relationship%20Queries/Check"
    },
    {
      "type": "WEB",
      "url": "https://openfga.dev/api/service#/Relationship%20Queries/ListObjects"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "OpenFGA vulnerable to denial of service due to circular relationship"
}


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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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