CVE-2019-0199

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By keeping streams open for requests that utilised the Servlet API's blocking I/O, clients were able to cause server-side threads to block eventually leading to thread exhaustion and a DoS."}], "problemTypes": [{"descriptions": [{"description": "DoS", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2020-04-15T21:06:48.000Z", "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://lists.apache.org/thread.html/e1b0b273b6e8ddcc72c9023bc2394b1276fc72664144bf21d0a87995%40%3Cannounce.tomcat.apache.org%3E"}, {"name": "[tomcat-dev] 20190413 svn commit: r1857494 [17/20] - in /tomcat/site/trunk: ./ docs/ xdocs/", "tags": ["mailing-list", "x_refsource_MLIST"], "url": "https://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745af9a17a%40%3Cdev.tomcat.apache.org%3E"}, {"name": "[tomcat-dev] 20190413 svn commit: r1857496 [3/4] - in /tomcat/site/trunk: ./ docs/ xdocs/", "tags": ["mailing-list", "x_refsource_MLIST"], "url": "https://lists.apache.org/thread.html/e85e83e9954f169bbb77b44baae5a33d8de878df557bb32b7f793661%40%3Cdev.tomcat.apache.org%3E"}, {"name": "[tomcat-dev] 20190415 svn commit: r1857582 [18/22] - 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{}

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By keeping streams open for requests that utilised the Servlet API's blocking I/O, clients were able to cause server-side threads to block eventually leading to thread exhaustion and a DoS."}, {"lang": "es", "value": "La implementaci\u00f3n HTTP/2 en Apache Tomcat desde 9.0.0.M1 hasta 9.0.14 y desde 8.5.0 hasta 8.5.37 aceptaba flujos con n\u00fameros excesivos de tramas SETTINS y permit\u00eda a los clientes mantener flujos abiertos sin datos de lectura/escritura o solicitud/respuesta. Manteniendo flujos abiertos para peticiones que utilizaban bloqueo I/O en el Servlet API\u00b4s, los clientes eran capaces de hacer que los hilos (threads) del lado del servidor se bloquearan, provocando el agotamiento de los hilos y la denegaci\u00f3n del servicio (DoS)."}], "id": "CVE-2019-0199", "lastModified": "2026-06-17T02:07:56.857", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.0"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2019-04-10T15:29:00.390", "references": [{"source": "security@apache.org", "url": "http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00090.html"}, {"source": "security@apache.org", "url": "http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00013.html"}, {"source": "security@apache.org", "url": "http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00054.html"}, {"source": "security@apache.org", "url": "http://www.securityfocus.com/bid/107674"}, {"source": "security@apache.org", "url": "https://access.redhat.com/errata/RHSA-2019:3929"}, {"source": 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{"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20190419-0001/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://support.f5.com/csp/article/K17321505"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.debian.org/security/2019/dsa-4596"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.oracle.com/security-alerts/cpuapr2020.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.oracle.com/security-alerts/cpujan2020.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html"}], "sourceIdentifier": "security@apache.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2019:3931", "cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5.2", "package": "tomcat", "product_name": "Red Hat JBoss Web Server 5", "release_date": "2019-11-20T00:00:00Z"}, {"advisory": "RHSA-2019:3929", "cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5.2::el6", "package": "jws5-ecj-0:4.12.0-1.redhat_1.1.el6jws", "product_name": "Red Hat JBoss Web Server 5.2 on RHEL 6", "release_date": "2019-11-20T00:00:00Z"}, {"advisory": "RHSA-2019:3929", "cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5.2::el6", "package": "jws5-javapackages-tools-0:3.4.1-5.15.11.el6jws", "product_name": "Red Hat JBoss Web Server 5.2 on RHEL 6", "release_date": "2019-11-20T00:00:00Z"}, {"advisory": "RHSA-2019:3929", "cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5.2::el6", "package": "jws5-jboss-logging-0:3.3.2-1.Final_redhat_00001.1.el6jws", "product_name": "Red Hat JBoss Web Server 5.2 on RHEL 6", "release_date": "2019-11-20T00:00:00Z"}, {"advisory": 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"release_date": "2019-11-20T00:00:00Z"}, {"advisory": "RHSA-2019:3929", "cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5.2::el7", "package": "jws5-tomcat-0:9.0.21-10.redhat_4.1.el7jws", "product_name": "Red Hat JBoss Web Server 5.2 on RHEL 7", "release_date": "2019-11-20T00:00:00Z"}, {"advisory": "RHSA-2019:3929", "cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5.2::el7", "package": "jws5-tomcat-native-0:1.2.21-34.redhat_34.el7jws", "product_name": "Red Hat JBoss Web Server 5.2 on RHEL 7", "release_date": "2019-11-20T00:00:00Z"}, {"advisory": "RHSA-2019:3929", "cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5.2::el7", "package": "jws5-tomcat-vault-0:1.1.8-1.Final_redhat_1.1.el7jws", "product_name": "Red Hat JBoss Web Server 5.2 on RHEL 7", "release_date": "2019-11-20T00:00:00Z"}, {"advisory": "RHSA-2019:3929", "cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5.2::el8", "package": "jws5-ecj-0:4.12.0-1.redhat_1.1.el8jws", "product_name": "Red Hat JBoss Web Server 5.2 on RHEL 8", "release_date": "2019-11-20T00:00:00Z"}, {"advisory": "RHSA-2019:3929", "cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5.2::el8", "package": "jws5-javapackages-tools-0:3.4.1-5.15.11.el8jws", "product_name": "Red Hat JBoss Web Server 5.2 on RHEL 8", "release_date": "2019-11-20T00:00:00Z"}, {"advisory": "RHSA-2019:3929", "cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5.2::el8", "package": "jws5-jboss-logging-0:3.3.2-1.Final_redhat_00001.1.el8jws", "product_name": "Red Hat JBoss Web Server 5.2 on RHEL 8", "release_date": "2019-11-20T00:00:00Z"}, {"advisory": "RHSA-2019:3929", "cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5.2::el8", "package": "jws5-mod_cluster-0:1.4.1-1.Final_redhat_00001.2.el8jws", "product_name": "Red Hat JBoss Web Server 5.2 on RHEL 8", "release_date": "2019-11-20T00:00:00Z"}, {"advisory": "RHSA-2019:3929", "cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5.2::el8", "package": "jws5-tomcat-0:9.0.21-10.redhat_4.1.el8jws", "product_name": "Red Hat JBoss Web Server 5.2 on RHEL 8", "release_date": "2019-11-20T00:00:00Z"}, {"advisory": "RHSA-2019:3929", "cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5.2::el8", "package": "jws5-tomcat-native-0:1.2.21-34.redhat_34.el8jws", "product_name": "Red Hat JBoss Web Server 5.2 on RHEL 8", "release_date": "2019-11-20T00:00:00Z"}, {"advisory": "RHSA-2019:3929", "cpe": "cpe:/a:redhat:jboss_enterprise_web_server:5.2::el8", "package": "jws5-tomcat-vault-0:1.1.8-1.Final_redhat_1.1.el8jws", "product_name": "Red Hat JBoss Web Server 5.2 on RHEL 8", "release_date": "2019-11-20T00:00:00Z"}, {"advisory": "RHSA-2020:2366", "cpe": "cpe:/a:redhat:openshift_application_runtimes:1.0", "package": "tomcat", "product_name": "Red Hat Runtimes Spring Boot 2.1.12", "release_date": "2020-06-04T00:00:00Z"}], "bugzilla": {"description": "tomcat: Apache Tomcat HTTP/2 DoS", "id": "1693325", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1693325"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-400", "details": ["The HTTP/2 implementation in Apache Tomcat 9.0.0.M1 to 9.0.14 and 8.5.0 to 8.5.37 accepted streams with excessive numbers of SETTINGS frames and also permitted clients to keep streams open without reading/writing request/response data. By keeping streams open for requests that utilised the Servlet API's blocking I/O, clients were able to cause server-side threads to block eventually leading to thread exhaustion and a DoS.", "A flaw was found in Apache Tomcat, where the HTTP/2 implementation accepted streams with excessive numbers of SETTINGS frames and also permitted clients to keep streams open, which enables them to cause server-side threads to block. This flaw eventually leads to a denial of service attack."], "name": "CVE-2019-0199", "package_state": [{"cpe": "cpe:/a:redhat:jboss_enterprise_bpms_platform", "fix_state": "Not affected", "package_name": "tomcat", "product_name": "Red Hat BPM Suite 6"}, {"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": "Will not fix", "package_name": "pki-deps:10.6/pki-servlet-container", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Not affected", "package_name": "tomcat", "product_name": "Red Hat Fuse 7"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_brms_platform:5", "fix_state": "Not affected", "package_name": "jbossweb", "product_name": "Red Hat JBoss BRMS 5"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_brms_platform:6", "fix_state": "Not affected", "package_name": "tomcat", "product_name": "Red Hat JBoss BRMS 6"}, {"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_grid:7", "fix_state": "Not affected", "package_name": "tomcat", "product_name": "Red Hat JBoss Data Grid 7"}, {"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:5", "fix_state": "Not affected", "package_name": "jbossweb", "product_name": "Red Hat JBoss Enterprise Application Platform 5"}, {"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_enterprise_web_server:2", "fix_state": "Not affected", "package_name": "tomcat6", "product_name": "Red Hat JBoss Enterprise Web Server 2"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_web_server:2", "fix_state": "Not affected", "package_name": "tomcat7", "product_name": "Red Hat JBoss Enterprise Web Server 2"}, {"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_fuse_service_works:6", "fix_state": "Not affected", "package_name": "jbossweb", "product_name": "Red Hat JBoss Fuse Service Works 6"}, {"cpe": "cpe:/a:redhat:jboss_operations_network:3", "fix_state": "Not affected", "package_name": "jbossweb", "product_name": "Red Hat JBoss Operations Network 3"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_soa_platform:5", "fix_state": "Not affected", "package_name": "jbossweb", "product_name": "Red Hat JBoss SOA Platform 5"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_web_server:3", "fix_state": "Not affected", "package_name": "tomcat7", "product_name": "Red Hat JBoss Web Server 3"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_web_server:3", "fix_state": "Not affected", "package_name": "tomcat8", "product_name": "Red Hat JBoss Web Server 3"}, {"cpe": "cpe:/a:redhat:openshift_application_runtimes:1.0", "fix_state": "Not affected", "package_name": "tomcat", "product_name": "Red Hat OpenShift Application Runtimes"}, {"cpe": "cpe:/a:redhat:rhel_software_collections:3", "fix_state": "Not affected", "package_name": "rh-java-common-tomcat", "product_name": "Red Hat Software Collections"}, {"cpe": "cpe:/a:redhat:openshift_application_runtimes:1.0", "fix_state": "Affected", "package_name": "tomcat", "product_name": "Red Hat support for Spring Boot"}], "public_date": "2019-03-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2019-0199\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-0199"], "statement": "pki-servlet-container does not use HTTP/2 in its default configuration.", "threat_severity": "Important"}

{}