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"cveTags": [], "descriptions": [{"lang": "en", "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."}, {"lang": "es", "value": "Apache Tomcat versiones 10.0.0-M1 hasta 10.0.6, versiones 9.0.0.M1 hasta 9.0.46 y versiones 8.5.0 hasta 8.5.66, no analizaban correctamente el encabezado de petici\u00f3n HTTP transfer-encoding en algunas circunstancias, conllevando a la posibilidad de contrabando de peticiones cuando se usaba con un proxy inverso. Espec\u00edficamente: - Tomcat ignoraba incorrectamente el encabezado de codificaci\u00f3n de transferencia si el cliente declaraba que s\u00f3lo aceptar\u00eda una respuesta HTTP/1.0; - Tomcat honraba la codificaci\u00f3n de identificaci\u00f3n; y - Tomcat no se aseguraba de que, si estaba presente, la codificaci\u00f3n en trozos fuera la codificaci\u00f3n final"}], "id": "CVE-2021-33037", "lastModified": "2026-08-25T16:28:27.310", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-07-12T15:15:08.400", "references": [{"source": "security@apache.org", "tags": ["Third Party Advisory"], "url": "https://kc.mcafee.com/corporate/index?page=content&id=SB10366"}, {"source": "security@apache.org", "url": "https://lists.apache.org/thread.html/r290aee55b72811fd19e75ac80f6143716c079170c5671b96932ed44b%40%3Ccommits.tomee.apache.org%3E"}, {"source": "security@apache.org", "url": 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{"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://www.oracle.com/security-alerts/cpuoct2021.html"}], "sourceIdentifier": "security@apache.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-444"}], "source": "security@apache.org", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-444"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2022:5532", "cpe": "cpe:/a:redhat:jboss_fuse:7", "impact": "low", "package": "tomcat", "product_name": "Red Hat Fuse 7.11", "release_date": "2022-07-07T00:00:00Z"}, {"advisory": "RHSA-2021:4863", "cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5.6", "package": "tomcat", "product_name": "Red Hat JBoss Web Server 5", "release_date": "2021-11-30T00:00:00Z"}, {"advisory": "RHSA-2021:4861", "cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5.6::el7", "package": "jws5-tomcat-0:9.0.50-3.redhat_00004.1.el7jws", "product_name": "Red Hat JBoss Web Server 5.6 on RHEL 7", "release_date": "2021-11-30T00:00:00Z"}, {"advisory": "RHSA-2021:4861", "cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5.6::el7", "package": "jws5-tomcat-native-0:1.2.30-3.redhat_3.el7jws", "product_name": "Red Hat JBoss Web Server 5.6 on RHEL 7", "release_date": "2021-11-30T00:00:00Z"}, {"advisory": "RHSA-2021:4861", "cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5.6::el7", "package": "jws5-tomcat-vault-0:1.1.8-4.Final_redhat_00004.1.el7jws", "product_name": "Red Hat JBoss Web Server 5.6 on RHEL 7", "release_date": "2021-11-30T00:00:00Z"}, {"advisory": "RHSA-2021:4861", "cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5.6::el8", "package": "jws5-tomcat-0:9.0.50-3.redhat_00004.1.el8jws", "product_name": "Red Hat JBoss Web Server 5.6 on RHEL 8", "release_date": "2021-11-30T00:00:00Z"}, {"advisory": "RHSA-2021:4861", "cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5.6::el8", "package": "jws5-tomcat-native-0:1.2.30-3.redhat_3.el8jws", "product_name": "Red Hat JBoss Web Server 5.6 on RHEL 8", "release_date": "2021-11-30T00:00:00Z"}, {"advisory": "RHSA-2021:4861", "cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5.6::el8", "package": "jws5-tomcat-vault-0:1.1.8-4.Final_redhat_00004.1.el8jws", "product_name": "Red Hat JBoss Web Server 5.6 on RHEL 8", "release_date": "2021-11-30T00:00:00Z"}, {"advisory": "RHSA-2022:1179", "cpe": "cpe:/a:redhat:openshift_application_runtimes:1.0", "package": "tomcat", "product_name": "Red Hat Support for Spring Boot 2.5.10", "release_date": "2022-04-12T00:00:00Z"}], "bugzilla": {"description": "tomcat: HTTP request smuggling when used with a reverse proxy", "id": "1981533", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1981533"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L", "status": "verified"}, "cwe": "CWE-444", "details": ["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."], "name": "CVE-2021-33037", "package_state": [{"cpe": "cpe:/a:redhat:jboss_enterprise_brms_platform:7", "fix_state": "Not affected", "package_name": "tomcat", "product_name": "Red Hat Decision Manager 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "tomcat6", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "tomcat", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "pki-deps:10.6/pki-servlet-engine", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/a:redhat:jboss_data_grid:6", "fix_state": "Not affected", "package_name": "jbossweb", "product_name": "Red Hat JBoss Data Grid 6"}, {"cpe": "cpe:/a:redhat:jboss_data_virtualization:6", "fix_state": "Not affected", "package_name": "jbossweb", "product_name": "Red Hat JBoss Data Virtualization 6"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:6", "fix_state": "Not affected", "package_name": "jbossweb", "product_name": "Red Hat JBoss Enterprise Application Platform 6"}, {"cpe": "cpe:/a:redhat:jboss_fuse:6", "fix_state": "Not affected", "package_name": "tomcat", "product_name": "Red Hat JBoss Fuse 6"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_web_server:3", "fix_state": "Not affected", "package_name": "tomcat", "product_name": "Red Hat JBoss Web Server 3"}, {"cpe": "cpe:/a:redhat:openstack:10", "fix_state": "Out of support scope", "package_name": "opendaylight", "product_name": "Red Hat OpenStack Platform 10 (Newton)"}, {"cpe": "cpe:/a:redhat:openstack:13", "fix_state": "Out of support scope", "package_name": "opendaylight", "product_name": "Red Hat OpenStack Platform 13 (Queens)"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_bpms_platform:7", "fix_state": "Not affected", "package_name": "tomcat", "product_name": "Red Hat Process Automation 7"}], "public_date": "2021-07-12T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-33037\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-33037"], "statement": "Red Hat OpenStack Platform's OpenDaylight will not be updated for this flaw because it was deprecated as of OpenStack Platform 14 and is only receiving security fixes for Critical flaws.", "threat_severity": "Moderate"}

{}