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{"affected_release": [{"advisory": "RHSA-2017:1161", "cpe": "cpe:/a:redhat:rhel_software_collections:2::el6", "package": "httpd24-httpd-0:2.4.25-9.el6", "product_name": "Red Hat Software Collections for Red Hat Enterprise Linux 6", "release_date": "2017-04-26T00:00:00Z"}, {"advisory": "RHSA-2017:1161", "cpe": "cpe:/a:redhat:rhel_software_collections:2::el6", "package": "httpd24-httpd-0:2.4.25-9.el6", "product_name": "Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS", "release_date": "2017-04-26T00:00:00Z"}, {"advisory": "RHSA-2017:1161", "cpe": "cpe:/a:redhat:rhel_software_collections:2::el7", "package": "httpd24-httpd-0:2.4.25-9.el7", "product_name": "Red Hat Software Collections for Red Hat Enterprise Linux 7", "release_date": "2017-04-26T00:00:00Z"}, {"advisory": "RHSA-2017:1161", "cpe": "cpe:/a:redhat:rhel_software_collections:2::el7", "package": "httpd24-httpd-0:2.4.25-9.el7", "product_name": "Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUS", "release_date": "2017-04-26T00:00:00Z"}], "bugzilla": {"description": "httpd: mod_http2 denial-of-service by thread starvation", "id": "1336350", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1336350"}, "csaw": false, "cvss": {"cvss_base_score": "4.3", "cvss_scoring_vector": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "status": "verified"}, "details": ["The Apache HTTP Server 2.4.17 and 2.4.18, when mod_http2 is enabled, does not limit the number of simultaneous stream workers for a single HTTP/2 connection, which allows remote attackers to cause a denial of service (stream-processing outage) via modified flow-control windows.", "A denial of service flaw was found in httpd's mod_http2 module. A remote attacker could use this flaw to block server threads for long times, causing starvation of worker threads, by manipulating the flow control windows on streams."], "name": "CVE-2016-1546", "package_state": [{"cpe": "cpe:/a:redhat:cloudforms_managementengine:5", "fix_state": "Not affected", "package_name": "httpd", "product_name": "CloudForms Management Engine 5"}, {"cpe": "cpe:/a:redhat:directory_server:8", "fix_state": "Not affected", "package_name": "httpd", "product_name": "Red Hat Directory Server 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 5"}, {"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:/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:1", "fix_state": "Not affected", "package_name": "httpd", "product_name": "Red Hat JBoss Enterprise Web Server 1"}, {"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 Enterprise Web Server 3"}], "public_date": "2016-04-11T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2016-1546\nhttps://nvd.nist.gov/vuln/detail/CVE-2016-1546\nhttp://httpd.apache.org/security/vulnerabilities_24.html"], "threat_severity": "Moderate", "upstream_fix": "httpd 2.4.20"}