CVE-2018-11763

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A possible mitigation is to not enable the h2 protocol."}], "problemTypes": [{"descriptions": [{"description": "mod_http2, DoS via continuous SETTINGS frames", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-06-06T10:11:00.000Z", "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html"}, {"name": "RHSA-2018:3558", "tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2018:3558"}, {"name": "105414", "tags": ["vdb-entry", "x_refsource_BID"], "url": "http://www.securityfocus.com/bid/105414"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03909en_us"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://security.netapp.com/advisory/ntap-20190204-0004/"}, {"name": "RHSA-2019:0367", "tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2019:0367"}, {"name": "USN-3783-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU"], "url": "https://usn.ubuntu.com/3783-1/"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://httpd.apache.org/security/vulnerabilities_24.html"}, {"name": "1041713", "tags": ["vdb-entry", "x_refsource_SECTRACK"], "url": "http://www.securitytracker.com/id/1041713"}, {"name": "RHSA-2019:0366", "tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2019:0366"}, {"tags": ["x_refsource_MISC"], "url": "https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html"}, {"name": "openSUSE-SU-2019:1547", "tags": ["vendor-advisory", "x_refsource_SUSE"], "url": "http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00030.html"}, {"name": "openSUSE-SU-2019:1814", "tags": ["vendor-advisory", "x_refsource_SUSE"], "url": "http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00056.html"}, {"name": "[httpd-cvs] 20190815 svn commit: r1048743 [4/4] - 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{}

{"affected": [{"affectedData": [{"product": "Apache HTTP Server", "vendor": "Apache Software Foundation", "versions": [{"status": "affected", "version": "2.4.17 to 2.4.34"}]}], "source": "security@apache.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "5B01C8E1-1FD7-4114-823E-7220B705A031", "versionEndIncluding": "2.4.34", "versionStartIncluding": "2.4.17", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*", "matchCriteriaId": "23A7C53F-B80F-4E6A-AFA9-58EEA84BE11D", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*", "matchCriteriaId": "2F6AB192-9D7D-4A9A-8995-E53A9DE9EAFC", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*", "matchCriteriaId": "142AD0DD-4CF3-4D74-9442-459CE3347E3A", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:7.4:*:*:*:*:*:*:*", "matchCriteriaId": "041F9200-4C01-4187-AE34-240E8277B54D", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:7.5:*:*:*:*:*:*:*", "matchCriteriaId": "4EB48767-F095-444F-9E05-D9AC345AB803", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:7.6:*:*:*:*:*:*:*", "matchCriteriaId": "5F6FA12B-504C-4DBF-A32E-0548557AA2ED", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:oracle:enterprise_manager_ops_center:12.3.3:*:*:*:*:*:*:*", "matchCriteriaId": "AB654DFA-FEF9-4D00-ADB0-F3F2B6ACF13E", "vulnerable": true}, {"criteria": "cpe:2.3:a:oracle:hospitality_guest_access:4.2.0:*:*:*:*:*:*:*", "matchCriteriaId": "1A3DC116-2844-47A1-BEC2-D0675DD97148", "vulnerable": true}, {"criteria": "cpe:2.3:a:oracle:hospitality_guest_access:4.2.1:*:*:*:*:*:*:*", "matchCriteriaId": "E0F1DF3E-0F2D-4EFC-9A3E-F72149C8AE94", "vulnerable": true}, {"criteria": "cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:*", "matchCriteriaId": "82EA4BA7-C38B-4AF3-8914-9E3D089EBDD4", "vulnerable": true}, {"criteria": "cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:*", "matchCriteriaId": "B9C9BC66-FA5F-4774-9BDA-7AB88E2839C4", "vulnerable": true}, {"criteria": "cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:*", "matchCriteriaId": "7F69B9A5-F21B-4904-9F27-95C0F7A628E3", "vulnerable": true}, {"criteria": "cpe:2.3:a:oracle:retail_xstore_point_of_service:7.0:*:*:*:*:*:*:*", "matchCriteriaId": "2F87FC90-16D0-4051-8280-B0DD4441F10B", "vulnerable": true}, {"criteria": "cpe:2.3:a:oracle:retail_xstore_point_of_service:7.1:*:*:*:*:*:*:*", "matchCriteriaId": "A0ED83E3-E6BF-4EAA-AF8F-33485A88A218", "vulnerable": true}, {"criteria": "cpe:2.3:a:oracle:secure_global_desktop:5.4:*:*:*:*:*:*:*", "matchCriteriaId": "B5265C91-FF5C-4451-A7C2-D388A65ACFA2", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:netapp:storage_automation_store:-:*:*:*:*:*:*:*", "matchCriteriaId": "7B7A6697-98CC-4E36-93DB-B7160F8399F9", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In Apache HTTP Server 2.4.17 to 2.4.34, by sending continuous, large SETTINGS frames a client can occupy a connection, server thread and CPU time without any connection timeout coming to effect. This affects only HTTP/2 connections. A possible mitigation is to not enable the h2 protocol."}, {"lang": "es", "value": "En Apache HTTP Server, de la versi\u00f3n 2.4.17 a la 2.4.34, mediante el env\u00edo continuo de tramas SETTINGS grandes, un cliente puede ocupar una conexi\u00f3n, hilo del servidor y tiempo de CPU sin que se active ning\u00fan agotamiento del tiempo de conexi\u00f3n. Esto solo afecta a las conexiones HTTP/2. Una posible mitigaci\u00f3n es no activar el protocolo h2."}], "id": "CVE-2018-11763", "lastModified": "2026-06-17T01:36:32.157", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 4.3, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.0"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2018-09-25T21:29:00.283", "references": [{"source": "security@apache.org", "url": "http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00030.html"}, {"source": "security@apache.org", "url": "http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00056.html"}, {"source": "security@apache.org", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/105414"}, {"source": "security@apache.org", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securitytracker.com/id/1041713"}, {"source": "security@apache.org", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2018:3558"}, {"source": "security@apache.org", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2019:0366"}, 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"https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03909en_us"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/3783-1/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.tenable.com/security/tns-2019-09"}], "sourceIdentifier": "security@apache.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2019:0367", "cpe": "cpe:/a:redhat:jboss_core_services:1::el6", "package": "jbcs-httpd24-0:1-6.jbcs.el6", "product_name": "JBoss Core Services on RHEL 6", "release_date": "2019-02-18T00:00:00Z"}, {"advisory": "RHSA-2019:0367", "cpe": "cpe:/a:redhat:jboss_core_services:1::el6", "package": "jbcs-httpd24-apache-commons-daemon-jsvc-1:1.1.0-3.redhat_2.jbcs.el6", "product_name": "JBoss Core Services on RHEL 6", "release_date": "2019-02-18T00:00:00Z"}, {"advisory": "RHSA-2019:0367", "cpe": "cpe:/a:redhat:jboss_core_services:1::el6", "package": "jbcs-httpd24-apr-0:1.6.3-31.jbcs.el6", "product_name": "JBoss Core Services on RHEL 6", "release_date": "2019-02-18T00:00:00Z"}, {"advisory": "RHSA-2019:0367", "cpe": "cpe:/a:redhat:jboss_core_services:1::el6", "package": "jbcs-httpd24-apr-util-0:1.6.1-24.jbcs.el6", "product_name": "JBoss Core Services on RHEL 6", "release_date": "2019-02-18T00:00:00Z"}, {"advisory": "RHSA-2019:0367", "cpe": 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"jbcs-httpd24-openssl-1:1.0.2n-14.jbcs.el6", "product_name": "JBoss Core Services on RHEL 6", "release_date": "2019-02-18T00:00:00Z"}, {"advisory": "RHSA-2019:0367", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-0:1-6.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2019-02-18T00:00:00Z"}, {"advisory": "RHSA-2019:0367", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-apache-commons-daemon-jsvc-1:1.1.0-3.redhat_2.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2019-02-18T00:00:00Z"}, {"advisory": "RHSA-2019:0367", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-apr-0:1.6.3-31.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2019-02-18T00:00:00Z"}, {"advisory": "RHSA-2019:0367", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-apr-util-0:1.6.1-24.jbcs.el7", "product_name": "JBoss Core Services 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{"advisory": "RHSA-2019:0367", "cpe": "cpe:/a:redhat:jboss_core_services:1::el7", "package": "jbcs-httpd24-openssl-1:1.0.2n-14.jbcs.el7", "product_name": "JBoss Core Services on RHEL 7", "release_date": "2019-02-18T00:00:00Z"}, {"advisory": "RHSA-2018:3558", "cpe": "cpe:/a:redhat:rhel_software_collections:3::el6", "package": "httpd24-curl-0:7.61.1-1.el6", "product_name": "Red Hat Software Collections for Red Hat Enterprise Linux 6", "release_date": "2018-11-13T00:00:00Z"}, {"advisory": "RHSA-2018:3558", "cpe": "cpe:/a:redhat:rhel_software_collections:3::el6", "package": "httpd24-httpd-0:2.4.34-7.el6", "product_name": "Red Hat Software Collections for Red Hat Enterprise Linux 6", "release_date": "2018-11-13T00:00:00Z"}, {"advisory": "RHSA-2018:3558", "cpe": "cpe:/a:redhat:rhel_software_collections:3::el6", "package": "httpd24-nghttp2-0:1.7.1-7.el6", "product_name": "Red Hat Software Collections for Red Hat Enterprise Linux 6", "release_date": "2018-11-13T00:00:00Z"}, {"advisory": "RHSA-2018:3558", "cpe": "cpe:/a:redhat:rhel_software_collections:3::el7", "package": "httpd24-curl-0:7.61.1-1.el7", "product_name": "Red Hat Software Collections for Red Hat Enterprise Linux 7", "release_date": "2018-11-13T00:00:00Z"}, {"advisory": "RHSA-2018:3558", "cpe": "cpe:/a:redhat:rhel_software_collections:3::el7", "package": "httpd24-httpd-0:2.4.34-7.el7", "product_name": "Red Hat Software Collections for Red Hat Enterprise Linux 7", "release_date": "2018-11-13T00:00:00Z"}, {"advisory": "RHSA-2018:3558", "cpe": "cpe:/a:redhat:rhel_software_collections:3::el7", "package": "httpd24-nghttp2-0:1.7.1-7.el7", "product_name": "Red Hat Software Collections for Red Hat Enterprise Linux 7", "release_date": "2018-11-13T00:00:00Z"}, {"advisory": "RHSA-2018:3558", "cpe": "cpe:/a:redhat:rhel_software_collections:3::el7", "package": "httpd24-curl-0:7.61.1-1.el7", "product_name": "Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS", "release_date": "2018-11-13T00:00:00Z"}, {"advisory": "RHSA-2018:3558", "cpe": "cpe:/a:redhat:rhel_software_collections:3::el7", "package": "httpd24-httpd-0:2.4.34-7.el7", "product_name": "Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS", "release_date": "2018-11-13T00:00:00Z"}, {"advisory": "RHSA-2018:3558", "cpe": "cpe:/a:redhat:rhel_software_collections:3::el7", "package": "httpd24-nghttp2-0:1.7.1-7.el7", "product_name": "Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS", "release_date": "2018-11-13T00:00:00Z"}, {"advisory": "RHSA-2018:3558", "cpe": "cpe:/a:redhat:rhel_software_collections:3::el7", "package": "httpd24-curl-0:7.61.1-1.el7", "product_name": "Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS", "release_date": "2018-11-13T00:00:00Z"}, {"advisory": "RHSA-2018:3558", "cpe": "cpe:/a:redhat:rhel_software_collections:3::el7", "package": "httpd24-httpd-0:2.4.34-7.el7", "product_name": "Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS", "release_date": "2018-11-13T00:00:00Z"}, {"advisory": "RHSA-2018:3558", "cpe": "cpe:/a:redhat:rhel_software_collections:3::el7", "package": "httpd24-nghttp2-0:1.7.1-7.el7", "product_name": "Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS", "release_date": "2018-11-13T00:00:00Z"}, {"advisory": "RHSA-2018:3558", "cpe": "cpe:/a:redhat:rhel_software_collections:3::el7", "package": "httpd24-curl-0:7.61.1-1.el7", "product_name": "Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS", "release_date": "2018-11-13T00:00:00Z"}, {"advisory": "RHSA-2018:3558", "cpe": "cpe:/a:redhat:rhel_software_collections:3::el7", "package": "httpd24-httpd-0:2.4.34-7.el7", "product_name": "Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS", "release_date": "2018-11-13T00:00:00Z"}, {"advisory": "RHSA-2018:3558", "cpe": "cpe:/a:redhat:rhel_software_collections:3::el7", "package": "httpd24-nghttp2-0:1.7.1-7.el7", "product_name": "Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS", "release_date": "2018-11-13T00:00:00Z"}, {"advisory": "RHSA-2019:0366", "cpe": "cpe:/a:redhat:jboss_core_services:1", "package": "httpd", "product_name": "Text-Only JBCS", "release_date": "2019-02-18T00:00:00Z"}], "bugzilla": {"description": "httpd: DoS for HTTP/2 connections by continuous SETTINGS frames", "id": "1633399", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1633399"}, "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-20", "details": ["In Apache HTTP Server 2.4.17 to 2.4.34, by sending continuous, large SETTINGS frames a client can occupy a connection, server thread and CPU time without any connection timeout coming to effect. This affects only HTTP/2 connections. A possible mitigation is to not enable the h2 protocol."], "name": "CVE-2018-11763", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "mod_http2", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:5", "fix_state": "Not affected", "package_name": "httpd", "product_name": "Red Hat JBoss Enterprise Application Platform 5"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:6", "fix_state": "Not affected", "package_name": "httpd", "product_name": "Red Hat JBoss Enterprise Application Platform 6"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_web_server:2", "fix_state": "Not affected", "package_name": "httpd", "product_name": "Red Hat JBoss Enterprise Web Server 2"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_web_server:3", "fix_state": "Not affected", "package_name": "httpd", "product_name": "Red Hat JBoss Web Server 3"}, {"cpe": "cpe:/a:redhat:mobile_application_platform:4", "fix_state": "Will not fix", "package_name": "httpd", "product_name": "Red Hat Mobile Application Platform 4"}, {"cpe": "cpe:/o:redhat:rhev_hypervisor:4", "fix_state": "Not affected", "package_name": "httpd", "product_name": "Red Hat Virtualization 4"}], "public_date": "2018-09-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2018-11763\nhttps://nvd.nist.gov/vuln/detail/CVE-2018-11763"], "threat_severity": "Moderate"}

{}