Vulnerability-Lookup

GHSA-CVXM-F295-X957

Vulnerability from github – Published: 2018-09-18 13:46 – Updated: 2023-09-12 18:47

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

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{
  "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"
}

CVE-2018-3751 (GCVE-0-2018-3751)

Vulnerability from cvelistv5 – Published: 2018-07-03 21:00 – Updated: 2024-09-17 03:38

Summary

The utilities function in all versions <= 0.3.0 of the merge-recursive node module can be tricked into modifying the prototype of Object when the attacker can control part of the structure passed to this function. This can let an attacker add or modify existing properties that will exist on all objects.

Severity

No CVSS data available.

CWE

Assigner

hackerone CNA under the mitre root

CNA scorecard D 60/100 over 228 records in the last 180 days details

References

1 reference

URL	Tags
https://hackerone.com/reports/311337	x_refsource_MISC

Date Public

2018-05-24 00:00

Show details on NVD website

JSON

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          }
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        }
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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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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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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