ghsa-hf5h-hh56-3vrg
Vulnerability from github
Published
2020-09-01 16:02
Modified
2020-08-31 18:12
Summary
Denial of Service in uws
Details

Affected versions of uws do not properly handle large websocket messages when permessage-deflate is enabled, which may result in a denial of service condition.

If uws recieves a 256Mb websocket message when permessage-deflate is enabled, the server will compress the message prior to executing the length check, and subsequently extract the message prior to processing. This can result in a situation where an excessively large websocket message passes the length checks, yet still gets cast from a Buffer to a string, which will exceed v8's maximum string size and crash the process.

Recommendation

Update to version 0.10.9 or later.

Alternatively, disable permessage-deflate.

Show details on source website

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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.10.8"
      },
      "package": {
        "ecosystem": "npm",
        "name": "uws"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.10.0"
            },
            {
              "fixed": "0.10.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2016-10544"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2020-08-31T18:12:32Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "Affected versions of `uws` do not properly handle large websocket messages when `permessage-deflate` is enabled, which may result in a denial of service condition.\n\nIf `uws` recieves a 256Mb websocket message when `permessage-deflate` is enabled, the server will compress the message prior to executing the length check, and subsequently extract the message prior to processing. This can result in a situation where an excessively large websocket message passes the length checks, yet still gets cast from a Buffer to a string, which will exceed v8\u0027s maximum string size and crash the process.\n\n\n## Recommendation\n\nUpdate to version 0.10.9 or later.\n\nAlternatively, disable `permessage-deflate`.",
  "id": "GHSA-hf5h-hh56-3vrg",
  "modified": "2020-08-31T18:12:32Z",
  "published": "2020-09-01T16:02:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2016-10544"
    },
    {
      "type": "WEB",
      "url": "https://github.com/uWebSockets/uWebSockets/commit/37deefd01f0875e133ea967122e3a5e421b8fcd9"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/advisories/149"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "Denial of Service in uws"
}


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