{
  "threat_severity" : "Moderate",
  "public_date" : "2016-04-11T00:00:00Z",
  "bugzilla" : {
    "description" : "httpd: mod_http2 denial-of-service by thread starvation",
    "id" : "1336350",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1336350"
  },
  "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." ],
  "affected_release" : [ {
    "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::el6",
    "package" : "httpd24-httpd-0:2.4.25-9.el6"
  }, {
    "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",
    "advisory" : "RHSA-2017:1161",
    "cpe" : "cpe:/a:redhat:rhel_software_collections:2::el7",
    "package" : "httpd24-httpd-0:2.4.25-9.el7"
  } ],
  "package_state" : [ {
    "product_name" : "CloudForms Management Engine 5",
    "fix_state" : "Not affected",
    "package_name" : "httpd",
    "cpe" : "cpe:/a:redhat:cloudforms_managementengine:5"
  }, {
    "product_name" : "Red Hat Directory Server 8",
    "fix_state" : "Not affected",
    "package_name" : "httpd",
    "cpe" : "cpe:/a:redhat:directory_server:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 5",
    "fix_state" : "Not affected",
    "package_name" : "httpd",
    "cpe" : "cpe:/o:redhat:enterprise_linux:5"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Not affected",
    "package_name" : "httpd",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "httpd",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat JBoss Enterprise Application Platform 5",
    "fix_state" : "Not affected",
    "package_name" : "httpd",
    "cpe" : "cpe:/a:redhat:jboss_enterprise_application_platform:5"
  }, {
    "product_name" : "Red Hat JBoss Enterprise Application Platform 6",
    "fix_state" : "Not affected",
    "package_name" : "httpd",
    "cpe" : "cpe:/a:redhat:jboss_enterprise_application_platform:6"
  }, {
    "product_name" : "Red Hat JBoss Enterprise Web Server 1",
    "fix_state" : "Not affected",
    "package_name" : "httpd",
    "cpe" : "cpe:/a:redhat:jboss_enterprise_web_server:1"
  }, {
    "product_name" : "Red Hat JBoss Enterprise Web Server 2",
    "fix_state" : "Not affected",
    "package_name" : "httpd",
    "cpe" : "cpe:/a:redhat:jboss_enterprise_web_server:2"
  }, {
    "product_name" : "Red Hat JBoss Enterprise Web Server 3",
    "fix_state" : "Not affected",
    "package_name" : "httpd",
    "cpe" : "cpe:/a:redhat:jboss_enterprise_web_server:3"
  } ],
  "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" ],
  "name" : "CVE-2016-1546",
  "csaw" : false
}