{
    "data_type": "CVE",
    "data_format": "MITRE",
    "data_version": "4.0",
    "CVE_data_meta": {
        "ASSIGNER": "report@snyk.io",
        "DATE_PUBLIC": "2022-05-13T20:00:01.480583Z",
        "ID": "CVE-2022-21190",
        "STATE": "PUBLIC",
        "TITLE": "Prototype Pollution"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "convict",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<",
                                            "version_value": "6.2.3"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "n/a"
                }
            ]
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "Prototype Pollution"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "refsource": "MISC",
                "url": "https://snyk.io/vuln/SNYK-JS-CONVICT-2774757",
                "name": "https://snyk.io/vuln/SNYK-JS-CONVICT-2774757"
            },
            {
                "refsource": "MISC",
                "url": "https://github.com/mozilla/node-convict/blob/3b86be087d8f14681a9c889d45da7fe3ad9cd880/packages/convict/src/main.js%23L571",
                "name": "https://github.com/mozilla/node-convict/blob/3b86be087d8f14681a9c889d45da7fe3ad9cd880/packages/convict/src/main.js%23L571"
            },
            {
                "refsource": "MISC",
                "url": "https://gist.github.com/dellalibera/cebce20e51410acebff1f46afdc89808",
                "name": "https://gist.github.com/dellalibera/cebce20e51410acebff1f46afdc89808"
            },
            {
                "refsource": "MISC",
                "url": "https://github.com/mozilla/node-convict/blob/master/CHANGELOG.md%23623---2022-05-07",
                "name": "https://github.com/mozilla/node-convict/blob/master/CHANGELOG.md%23623---2022-05-07"
            },
            {
                "refsource": "MISC",
                "url": "https://github.com/mozilla/node-convict/commit/1ea0ab19c5208f66509e1c43b0d0f21c1fd29b75",
                "name": "https://github.com/mozilla/node-convict/commit/1ea0ab19c5208f66509e1c43b0d0f21c1fd29b75"
            }
        ]
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "This affects the package convict before 6.2.3. This is a bypass of [CVE-2022-22143](https://security.snyk.io/vuln/SNYK-JS-CONVICT-2340604). The [fix](https://github.com/mozilla/node-convict/commit/3b86be087d8f14681a9c889d45da7fe3ad9cd880) introduced, relies on the startsWith method and does not prevent the vulnerability: before splitting the path, it checks if it starts with __proto__ or this.constructor.prototype. To bypass this check it's possible to prepend the dangerous paths with any string value followed by a dot, like for example foo.__proto__ or foo.this.constructor.prototype."
            }
        ]
    },
    "impact": {
        "cvss": {
            "version": "3.1",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "attackVector": "NETWORK",
            "attackComplexity": "LOW",
            "privilegesRequired": "NONE",
            "userInteraction": "NONE",
            "scope": "UNCHANGED",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "availabilityImpact": "HIGH"
        }
    },
    "credit": [
        {
            "lang": "eng",
            "value": "Alessio Della Libera of Snyk Security Team"
        }
    ]
}