cvelist/2019/16xxx/CVE-2019-16786.json

{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2019-16786",
        "STATE": "PUBLIC",
        "TITLE": "HTTP Request Smuggling: Invalid Transfer-Encoding in Waitress"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Waitress",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<=",
                                            "version_name": "<= 1.3.1",
                                            "version_value": "1.3.1"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "Pylons"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "Waitress through version 1.3.1 would parse the Transfer-Encoding header and only look for a single string value, if that value was not chunked it would fall through and use the Content-Length header instead. According to the HTTP standard Transfer-Encoding should be a comma separated list, with the inner-most encoding first, followed by any further transfer codings, ending with chunked. Requests sent with: \"Transfer-Encoding: gzip, chunked\" would incorrectly get ignored, and the request would use a Content-Length header instead to determine the body size of the HTTP message. This could allow for Waitress to treat a single request as multiple requests in the case of HTTP pipelining. This issue is fixed in Waitress 1.4.0."
            }
        ]
    },
    "impact": {
        "cvss": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://github.com/Pylons/waitress/security/advisories/GHSA-g2xc-35jw-c63p",
                "refsource": "CONFIRM",
                "url": "https://github.com/Pylons/waitress/security/advisories/GHSA-g2xc-35jw-c63p"
            },
            {
                "name": "https://docs.pylonsproject.org/projects/waitress/en/latest/#security-fixes",
                "refsource": "MISC",
                "url": "https://docs.pylonsproject.org/projects/waitress/en/latest/#security-fixes"
            },
            {
                "name": "https://github.com/Pylons/waitress/commit/f11093a6b3240fc26830b6111e826128af7771c3",
                "refsource": "MISC",
                "url": "https://github.com/Pylons/waitress/commit/f11093a6b3240fc26830b6111e826128af7771c3"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2020-bdcc8ffc24",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GVDHR2DNKCNQ7YQXISJ45NT4IQDX3LJ7/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2020-65a7744e38",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LYEOTGWJZVKPRXX2HBNVIYWCX73QYPM5/"
            },
            {
                "refsource": "REDHAT",
                "name": "RHSA-2020:0720",
                "url": "https://access.redhat.com/errata/RHSA-2020:0720"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-g2xc-35jw-c63p",
        "discovery": "UNKNOWN"
    }
}