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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
Show details on source website
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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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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • 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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.