{
    "data_type": "CVE",
    "data_format": "MITRE",
    "data_version": "4.0",
    "CVE_data_meta": {
        "ID": "CVE-2020-13943",
        "ASSIGNER": "security@apache.org",
        "STATE": "PUBLIC"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "n/a",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Apache Tomcat",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "Apache Tomcat 10.0.0-M1 to 10.0.0-M7, 9.0.0.M1 to 9.0.37, 8.5.0 to 8.5.57"
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "Information Disclosure"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "refsource": "MISC",
                "name": "https://lists.apache.org/thread.html/r4a390027eb27e4550142fac6c8317cc684b157ae314d31514747f307%40%3Cannounce.tomcat.apache.org%3E",
                "url": "https://lists.apache.org/thread.html/r4a390027eb27e4550142fac6c8317cc684b157ae314d31514747f307%40%3Cannounce.tomcat.apache.org%3E"
            },
            {
                "refsource": "MLIST",
                "name": "[debian-lts-announce] 20201014 [SECURITY] [DLA 2407-1] tomcat8 security update",
                "url": "https://lists.debian.org/debian-lts-announce/2020/10/msg00019.html"
            },
            {
                "refsource": "CONFIRM",
                "name": "https://security.netapp.com/advisory/ntap-20201016-0007/",
                "url": "https://security.netapp.com/advisory/ntap-20201016-0007/"
            },
            {
                "refsource": "SUSE",
                "name": "openSUSE-SU-2020:1799",
                "url": "http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00002.html"
            },
            {
                "refsource": "SUSE",
                "name": "openSUSE-SU-2020:1842",
                "url": "http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00021.html"
            },
            {
                "refsource": "DEBIAN",
                "name": "DSA-4835",
                "url": "https://www.debian.org/security/2021/dsa-4835"
            }
        ]
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "If an HTTP/2 client connecting to Apache Tomcat 10.0.0-M1 to 10.0.0-M7, 9.0.0.M1 to 9.0.37 or 8.5.0 to 8.5.57 exceeded the agreed maximum number of concurrent streams for a connection (in violation of the HTTP/2 protocol), it was possible that a subsequent request made on that connection could contain HTTP headers - including HTTP/2 pseudo headers - from a previous request rather than the intended headers. This could lead to users seeing responses for unexpected resources."
            }
        ]
    }
}