{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2021-32640",
        "STATE": "PUBLIC",
        "TITLE": "ReDoS in Sec-Websocket-Protocol header"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "ws",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": ">= 5.0.0 <= 7.4.5"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "websockets"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "ws is an open source WebSocket client and server library for Node.js. A specially crafted value of the `Sec-Websocket-Protocol` header can be used to significantly slow down a ws server. The vulnerability has been fixed in ws@7.4.6 (https://github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff). In vulnerable versions of ws, the issue can be mitigated by reducing the maximum allowed length of the request headers using the [`--max-http-header-size=size`](https://nodejs.org/api/cli.html#cli_max_http_header_size_size) and/or the [`maxHeaderSize`](https://nodejs.org/api/http.html#http_http_createserver_options_requestlistener) options."
            }
        ]
    },
    "impact": {
        "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-400: Uncontrolled Resource Consumption"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://github.com/websockets/ws/security/advisories/GHSA-6fc8-4gx4-v693",
                "refsource": "CONFIRM",
                "url": "https://github.com/websockets/ws/security/advisories/GHSA-6fc8-4gx4-v693"
            },
            {
                "name": "https://github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff",
                "refsource": "MISC",
                "url": "https://github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff"
            },
            {
                "refsource": "MLIST",
                "name": "[tinkerpop-commits] 20210701 [tinkerpop] 01/03: Bumped ws to 6.2.2 to address CVE-2021-32640 CTR",
                "url": "https://lists.apache.org/thread.html/rdfa7b6253c4d6271e31566ecd5f30b7ce1b8fb2c89d52b8c4e0f4e30@%3Ccommits.tinkerpop.apache.org%3E"
            },
            {
                "refsource": "CONFIRM",
                "name": "https://security.netapp.com/advisory/ntap-20210706-0005/",
                "url": "https://security.netapp.com/advisory/ntap-20210706-0005/"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-6fc8-4gx4-v693",
        "discovery": "UNKNOWN"
    }
}