GHSA-6WXG-WH7F-RQPR

Vulnerability from github – Published: 2023-02-16 20:46 – Updated: 2023-04-14 21:35
VLAI?
Summary
XML External Entity (XXE) vulnerability in apoc.import.graphml
Details

Impact

A XML External Entity (XXE) vulnerability found in the apoc.import.graphml procedure of APOC core plugin in Neo4j graph database. XML External Entity (XXE) injection occurs when the XML parser allows external entities to be resolved. The XML parser used by the apoc.import.graphml procedure was not configured in a secure way and therefore allowed this.

External entities can be used to read local files, send HTTP requests, and perform denial-of-service attacks on the application.

Abusing the XXE vulnerability enabled assessors to read local files remotely. Although with the level of privileges assessors had this was limited to one-line files. With the ability to write to the database, any file could have been read. Additionally, assessors noted, with local testing, the server could be crashed by passing in improperly formatted XML.

Patches

The users should aim to use the latest released version compatible with their Neo4j version. The minimum versions containing patch for this vulnerability is 5.5.0.

Workarounds

If you cannot upgrade the library, you can control the allowlist of the procedures that can be used in your system.

For more information

If you have any questions or comments about this advisory: * Open an issue in neo4j-apoc * Email us at security@neo4j.com

Credits

We want to publicly recognise the contribution of Christopher Schneider – State Farm.

Severity ?
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.neo4j.procedure:apoc-core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.0.0"
            },
            {
              "fixed": "5.5.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.neo4j.procedure:apoc-core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.4.0.14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-23926"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-611"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-02-16T20:46:49Z",
    "nvd_published_at": "2023-02-16T16:15:00Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\nA XML External Entity (XXE) vulnerability found in the apoc.import.graphml procedure of APOC core plugin in Neo4j graph database. XML External Entity (XXE) injection occurs when the XML parser allows external entities to be resolved. The XML parser used by the apoc.import.graphml procedure was not configured in a secure way and therefore allowed this. \n\nExternal entities can be used to read local files, send HTTP requests, and perform denial-of-service attacks on the application.\n\nAbusing the XXE vulnerability enabled assessors to read local files remotely. Although with the level of privileges assessors had this was limited to one-line files. With the ability to write to the database, any file could have been read. Additionally, assessors noted, with local testing, the server could be crashed by passing in improperly formatted XML. \n\n### Patches\nThe users should aim to use the latest released version compatible with their Neo4j version. The minimum versions containing patch for this vulnerability is 5.5.0. \n\n### Workarounds\nIf you cannot upgrade the library, you can control the\u00a0[allowlist](https://neo4j.com/docs/operations-manual/current/reference/configuration-settings/#config_dbms.security.procedures.allowlist)  of the  procedures\u00a0that can be used in your system.\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in\u00a0[neo4j-apoc](https://github.com/neo4j/apoc)\n* Email us at\u00a0[security@neo4j.com](mailto:security@neo4j.com)\n\n### Credits\nWe want to publicly recognise the contribution of Christopher Schneider \u2013 State Farm.\n",
  "id": "GHSA-6wxg-wh7f-rqpr",
  "modified": "2023-04-14T21:35:17Z",
  "published": "2023-02-16T20:46:49Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/neo4j/apoc/security/advisories/GHSA-6wxg-wh7f-rqpr"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-23926"
    },
    {
      "type": "WEB",
      "url": "https://github.com/neo4j/apoc/pull/310"
    },
    {
      "type": "WEB",
      "url": "https://github.com/neo4j/apoc/commit/f175f1f1f663d29fc151c297b56d154255eb7016"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/neo4j/apoc"
    },
    {
      "type": "WEB",
      "url": "https://github.com/neo4j/apoc/releases/tag/5.5.0"
    },
    {
      "type": "WEB",
      "url": "https://neo4j.com/docs/operations-manual/current/reference/configuration-settings/#config_dbms.security.procedures.allowlist"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "XML External Entity (XXE) vulnerability in apoc.import.graphml"
}


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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.