{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2022-21685",
        "STATE": "PUBLIC",
        "TITLE": "Integer underflow in Frontier"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "frontier",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "< 8a93fdc"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "paritytech"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "Frontier is Substrate's Ethereum compatibility layer. Prior to commit number `8a93fdc6c9f4eb1d2f2a11b7ff1d12d70bf5a664`, a bug in Frontier's MODEXP precompile implementation can cause an integer underflow in certain conditions. This will cause a node crash for debug builds. For release builds (and production WebAssembly binaries), the impact is limited as it can only cause a normal EVM out-of-gas. Users who do not use MODEXP precompile in their runtime are not impacted. A patch is available in pull request #549."
            }
        ]
    },
    "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-191: Integer Underflow (Wrap or Wraparound)"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://github.com/paritytech/frontier/security/advisories/GHSA-cjg2-2fjg-fph4",
                "refsource": "CONFIRM",
                "url": "https://github.com/paritytech/frontier/security/advisories/GHSA-cjg2-2fjg-fph4"
            },
            {
                "name": "https://github.com/paritytech/frontier/pull/549",
                "refsource": "MISC",
                "url": "https://github.com/paritytech/frontier/pull/549"
            },
            {
                "name": "https://github.com/paritytech/frontier/commit/8a93fdc6c9f4eb1d2f2a11b7ff1d12d70bf5a664",
                "refsource": "MISC",
                "url": "https://github.com/paritytech/frontier/commit/8a93fdc6c9f4eb1d2f2a11b7ff1d12d70bf5a664"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-cjg2-2fjg-fph4",
        "discovery": "UNKNOWN"
    }
}