{
    "CVE_data_meta": {
        "ASSIGNER": "security@apache.org",
        "ID": "CVE-2021-33037",
        "STATE": "PUBLIC",
        "TITLE": "Incorrect Transfer-Encoding handling with HTTP/1.0"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Apache Tomcat",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_name": "Apache Tomcat 10",
                                            "version_value": "10.0.0-M1 to 10.0.6"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "Apache Tomcat 9",
                                            "version_value": "9.0.0.M1 to 9.0.46"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_name": "Apache Tomcat 8",
                                            "version_value": "8.5.0 to 8.5.66"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "Apache Software Foundation"
                }
            ]
        }
    },
    "credit": [
        {
            "lang": "eng",
            "value": "The Apache Tomcat Security Team would like to thank Bahruz Jabiyev, Steven Sprecher and Kaan Onarlioglu of NEU seclab for identifying and reporting this issue."
        }
    ],
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "Apache Tomcat 10.0.0-M1 to 10.0.6, 9.0.0.M1 to 9.0.46 and 8.5.0 to 8.5.66 did not correctly parse the HTTP transfer-encoding request header in some circumstances leading to the possibility to request smuggling when used with a reverse proxy. Specifically: - Tomcat incorrectly ignored the transfer encoding header if the client declared it would only accept an HTTP/1.0 response; - Tomcat honoured the identify encoding; and - Tomcat did not ensure that, if present, the chunked encoding was the final encoding."
            }
        ]
    },
    "generator": {
        "engine": "Vulnogram 0.0.9"
    },
    "impact": [
        {}
    ],
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "refsource": "MISC",
                "url": "https://lists.apache.org/thread.html/r612a79269b0d5e5780c62dfd34286a8037232fec0bc6f1a7e60c9381%40%3Cannounce.tomcat.apache.org%3E",
                "name": "https://lists.apache.org/thread.html/r612a79269b0d5e5780c62dfd34286a8037232fec0bc6f1a7e60c9381%40%3Cannounce.tomcat.apache.org%3E"
            },
            {
                "url": "https://www.oracle.com//security-alerts/cpujul2021.html",
                "refsource": "MISC",
                "name": "https://www.oracle.com//security-alerts/cpujul2021.html"
            },
            {
                "refsource": "MLIST",
                "name": "[tomee-commits] 20210728 [jira] [Created] (TOMEE-3778) Update embedded Tomcat to 9.0.48 or later to address CVE-2021-33037",
                "url": "https://lists.apache.org/thread.html/r40f921575aee8d7d34e53182f862c45cbb8f3d898c9d4e865c2ec262@%3Ccommits.tomee.apache.org%3E"
            },
            {
                "refsource": "MLIST",
                "name": "[tomee-commits] 20210728 [jira] [Commented] (TOMEE-3778) Update embedded Tomcat to 9.0.48 or later to address CVE-2021-33037",
                "url": "https://lists.apache.org/thread.html/re01e7e93154e8bdf78a11a23f9686427bd3d51fc6e12c508645567b7@%3Ccommits.tomee.apache.org%3E"
            },
            {
                "refsource": "MLIST",
                "name": "[debian-lts-announce] 20210805 [SECURITY] [DLA 2733-1] tomcat8 security update",
                "url": "https://lists.debian.org/debian-lts-announce/2021/08/msg00009.html"
            },
            {
                "refsource": "DEBIAN",
                "name": "DSA-4952",
                "url": "https://www.debian.org/security/2021/dsa-4952"
            },
            {
                "refsource": "MLIST",
                "name": "[tomee-commits] 20210830 [jira] [Commented] (TOMEE-3778) Update embedded Tomcat to 9.0.48 or later to address CVE-2021-33037",
                "url": "https://lists.apache.org/thread.html/rd0dfea39829bc0606c936a16f6fca338127c86c0a1083970b45ac8d2@%3Ccommits.tomee.apache.org%3E"
            },
            {
                "refsource": "MLIST",
                "name": "[tomee-commits] 20210913 [jira] [Commented] (TOMEE-3778) Update embedded Tomcat to 9.0.48 or later to address CVE-2021-33037",
                "url": "https://lists.apache.org/thread.html/r290aee55b72811fd19e75ac80f6143716c079170c5671b96932ed44b@%3Ccommits.tomee.apache.org%3E"
            },
            {
                "refsource": "MLIST",
                "name": "[tomee-commits] 20210914 [jira] [Commented] (TOMEE-3778) Update embedded Tomcat to 9.0.48 or later to address CVE-2021-33037",
                "url": "https://lists.apache.org/thread.html/rf1b54fd3f52f998ca4829159a88cc4c23d6cef5c6447d00948e75c97@%3Ccommits.tomee.apache.org%3E"
            },
            {
                "refsource": "MLIST",
                "name": "[tomee-commits] 20210916 [jira] [Resolved] (TOMEE-3778) Update embedded Tomcat to 9.0.48 or later to address CVE-2021-33037",
                "url": "https://lists.apache.org/thread.html/rc6ef52453bb996a98cb45442871a1db56b7c349939e45d829bf9ae37@%3Ccommits.tomee.apache.org%3E"
            },
            {
                "url": "https://www.oracle.com/security-alerts/cpuoct2021.html",
                "refsource": "MISC",
                "name": "https://www.oracle.com/security-alerts/cpuoct2021.html"
            },
            {
                "refsource": "CONFIRM",
                "name": "https://security.netapp.com/advisory/ntap-20210827-0007/",
                "url": "https://security.netapp.com/advisory/ntap-20210827-0007/"
            },
            {
                "refsource": "CONFIRM",
                "name": "https://kc.mcafee.com/corporate/index?page=content&id=SB10366",
                "url": "https://kc.mcafee.com/corporate/index?page=content&id=SB10366"
            },
            {
                "url": "https://www.oracle.com/security-alerts/cpujan2022.html",
                "refsource": "MISC",
                "name": "https://www.oracle.com/security-alerts/cpujan2022.html"
            },
            {
                "url": "https://www.oracle.com/security-alerts/cpuapr2022.html",
                "refsource": "MISC",
                "name": "https://www.oracle.com/security-alerts/cpuapr2022.html"
            },
            {
                "refsource": "GENTOO",
                "name": "GLSA-202208-34",
                "url": "https://security.gentoo.org/glsa/202208-34"
            }
        ]
    },
    "source": {
        "discovery": "UNKNOWN"
    }
}