{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2022-21698",
        "STATE": "PUBLIC",
        "TITLE": "Uncontrolled Resource Consumption in promhttp"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "client_golang",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "< 1.11.1"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "prometheus"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "client_golang is the instrumentation library for Go applications in Prometheus, and the promhttp package in client_golang provides tooling around HTTP servers and clients. In client_golang prior to version 1.11.1, HTTP server is susceptible to a Denial of Service through unbounded cardinality, and potential memory exhaustion, when handling requests with non-standard HTTP methods. In order to be affected, an instrumented software must use any of `promhttp.InstrumentHandler*` middleware except `RequestsInFlight`; not filter any specific methods (e.g GET) before middleware; pass metric with `method` label name to our middleware; and not have any firewall/LB/proxy that filters away requests with unknown `method`. client_golang version 1.11.1 contains a patch for this issue. Several workarounds are available, including removing the `method` label name from counter/gauge used in the InstrumentHandler; turning off affected promhttp handlers; adding custom middleware before promhttp handler that will sanitize the request method given by Go http.Request; and using a reverse proxy or web application firewall, configured to only allow a limited set of methods."
            }
        ]
    },
    "impact": {
        "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "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:H",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-400: Uncontrolled Resource Consumption"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://github.com/prometheus/client_golang/security/advisories/GHSA-cg3q-j54f-5p7p",
                "refsource": "CONFIRM",
                "url": "https://github.com/prometheus/client_golang/security/advisories/GHSA-cg3q-j54f-5p7p"
            },
            {
                "name": "https://github.com/prometheus/client_golang/pull/962",
                "refsource": "MISC",
                "url": "https://github.com/prometheus/client_golang/pull/962"
            },
            {
                "name": "https://github.com/prometheus/client_golang/pull/987",
                "refsource": "MISC",
                "url": "https://github.com/prometheus/client_golang/pull/987"
            },
            {
                "name": "https://github.com/prometheus/client_golang/releases/tag/v1.11.1",
                "refsource": "MISC",
                "url": "https://github.com/prometheus/client_golang/releases/tag/v1.11.1"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2022-5f253807ce",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FY3N7H6VSDZM37B4SKM2PFFCUWU7QYWN/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2022-6c4cb64314",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZKORFJTRRDJCWBTJPISKKCVMMMJBIRLG/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2022-eda0e65b01",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AK7CJBCGERCRXYUR2EWDSSDVAQMTAZGX/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2022-6043a7b938",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SASRKYHT5ZFSVMJUQUG3UAEQRJYGJKAR/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2022-e244ad73d6",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KBMVIQFKQDSSTHVVJWJ4QH6TW3JVB7XZ/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2022-a7d438b30b",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7V7I72LSQ3IET3QJR6QPAVGJZ4CBDLN5/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2022-83405f9d5b",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HLAQRRGNSO5MYCPAXGPH2OCSHOGHSQMQ/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2022-9dd03cab55",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2PFW6Q2LXXWTFRTMTRN4ZGADFRQPKJ3D/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2022-c87047f163",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/J5WPM42UR6XIBQNQPNQHM32X7S4LJTRX/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2022-2067702f06",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4KDETHL5XCT6RZN2BBNOCEXRZ2W3SFU3/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2022-c5383675d9",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/36GUEPA5TPSC57DZTPYPBL6T7UPQ2FRH/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2022-5e637f6cc6",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DLUJZV3HBP56ADXU6QH2V7RNYUPMVBXQ/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2022-396c568c5e",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2IK53GWZ475OQ6ENABKMJMTOBZG6LXUR/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2022-92ef43c439",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MH6ALXEQXIFQRQFNJ5Y2MJ5DFPIX76VN/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2022-fae3ecee19",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZY2SLWOQR4ZURQ7UBRZ7JIX6H6F5JHJR/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2022-739c7a0058",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RN7JGC2LVHPEGSJYODFUV5FEKPBVG4D7/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2022-13ad572b5a",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5OGNAFVXSMTTT2UPH6CS3IH6L3KM42Q7/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2022-741325e9a0",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3L6GDN5S5QZSCFKWD3GKL2RDZQ6B4UWA/"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-cg3q-j54f-5p7p",
        "discovery": "UNKNOWN"
    }
}