{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2021-21369",
        "STATE": "PUBLIC",
        "TITLE": "Potential DoS in Besu HTTP JSON-RPC API"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "besu",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "< 1.5.1"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "hyperledger"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "Hyperledger Besu is an open-source, MainNet compatible, Ethereum client written in Java. In Besu before version 1.5.1 there is a denial-of-service vulnerability involving the HTTP JSON-RPC API service. If username and password authentication is enabled for the HTTP JSON-RPC API service, then prior to making any requests to an API endpoint the requestor must use the login endpoint to obtain a JSON web token (JWT) using their credentials. A single user can readily overload the login endpoint with invalid requests (incorrect password). As the supplied password is checked for validity on the main vertx event loop and takes a relatively long time this can cause the processing of other valid requests to fail. A valid username is required for this vulnerability to be exposed. This has been fixed in version 1.5.1."
            }
        ]
    },
    "impact": {
        "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-400 Uncontrolled Resource Consumption"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://github.com/hyperledger/besu/security/advisories/GHSA-qgfj-mjpc-7w3q",
                "refsource": "CONFIRM",
                "url": "https://github.com/hyperledger/besu/security/advisories/GHSA-qgfj-mjpc-7w3q"
            },
            {
                "name": "https://github.com/hyperledger/besu/blob/master/CHANGELOG.md#151",
                "refsource": "MISC",
                "url": "https://github.com/hyperledger/besu/blob/master/CHANGELOG.md#151"
            },
            {
                "name": "https://github.com/hyperledger/besu/pull/1144",
                "refsource": "MISC",
                "url": "https://github.com/hyperledger/besu/pull/1144"
            },
            {
                "name": "https://github.com/hyperledger/besu/commit/06e35a58c07a30c0fbdc0aae45a3e8b06b53c022",
                "refsource": "MISC",
                "url": "https://github.com/hyperledger/besu/commit/06e35a58c07a30c0fbdc0aae45a3e8b06b53c022"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-qgfj-mjpc-7w3q",
        "discovery": "UNKNOWN"
    }
}