{
  "threat_severity" : "Moderate",
  "public_date" : "2020-12-03T00:00:00Z",
  "bugzilla" : {
    "description" : "tomcat: HTTP/2 request header mix-up",
    "id" : "1904221",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1904221"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.5",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
    "status" : "verified"
  },
  "cwe" : "CWE-200",
  "details" : [ "While investigating bug 64830 it was discovered that Apache Tomcat 10.0.0-M1 to 10.0.0-M9, 9.0.0-M1 to 9.0.39 and 8.5.0 to 8.5.59 could re-use an HTTP request header value from the previous stream received on an HTTP/2 connection for the request associated with the subsequent stream. While this would most likely lead to an error and the closure of the HTTP/2 connection, it is possible that information could leak between requests." ],
  "statement" : "Red Hat Enterprise Linux 8's Identity Management and Certificate System are using a vulnerable version of Tomcat that is bundled into the pki-servlet-engine component. However, HTTP/2 is not enabled in such a configuration, and it is not possible to trigger the flaw in a supported setup. A future update may fix the code.\nRed Hat Enterprise Linux 7's tomcat package, Identity Management, and Certificate System are all not affected by this flaw because HTTP/2 is not supported in the shipped version of tomcat in those packages.\ntomcat5 and tomcat6 in Red Hat Enterprise Linux 5 and 6 (respectively) are not affected by this flaw because HTTP/2 is not supported in the shipped versions of those packages.\npki-servlet-engine has been obsoleted by Tomcat in Red Hat Enterprise Linux 8.9 and later. Therefore no additional fixes would be made available for the servlet engine.",
  "affected_release" : [ {
    "product_name" : "Red Hat Fuse 7.10",
    "release_date" : "2021-12-14T00:00:00Z",
    "advisory" : "RHSA-2021:5134",
    "cpe" : "cpe:/a:redhat:jboss_fuse:7",
    "package" : "tomcat",
    "impact" : "low"
  }, {
    "product_name" : "Red Hat JBoss Web Server 5",
    "release_date" : "2021-02-11T00:00:00Z",
    "advisory" : "RHSA-2021:0495",
    "cpe" : "cpe:/a:redhat:jboss_enterprise_web_server:5.4",
    "package" : "tomcat"
  }, {
    "product_name" : "Red Hat JBoss Web Server 5.4 on RHEL 7",
    "release_date" : "2021-02-11T00:00:00Z",
    "advisory" : "RHSA-2021:0494",
    "cpe" : "cpe:/a:redhat:jboss_enterprise_web_server:5.4::el7",
    "package" : "jws5-tomcat-0:9.0.36-9.redhat_8.1.el7jws"
  }, {
    "product_name" : "Red Hat JBoss Web Server 5.4 on RHEL 7",
    "release_date" : "2021-02-11T00:00:00Z",
    "advisory" : "RHSA-2021:0494",
    "cpe" : "cpe:/a:redhat:jboss_enterprise_web_server:5.4::el7",
    "package" : "jws5-tomcat-native-0:1.2.25-3.redhat_3.el7jws"
  }, {
    "product_name" : "Red Hat JBoss Web Server 5.4 on RHEL 8",
    "release_date" : "2021-02-11T00:00:00Z",
    "advisory" : "RHSA-2021:0494",
    "cpe" : "cpe:/a:redhat:jboss_enterprise_web_server:5.4::el8",
    "package" : "jws5-tomcat-0:9.0.36-9.redhat_8.1.el8jws"
  }, {
    "product_name" : "Red Hat JBoss Web Server 5.4 on RHEL 8",
    "release_date" : "2021-02-11T00:00:00Z",
    "advisory" : "RHSA-2021:0494",
    "cpe" : "cpe:/a:redhat:jboss_enterprise_web_server:5.4::el8",
    "package" : "jws5-tomcat-native-0:1.2.25-3.redhat_3.el8jws"
  }, {
    "product_name" : "Red Hat Support for Spring Boot 2.4.9",
    "release_date" : "2021-10-28T00:00:00Z",
    "advisory" : "RHSA-2021:4012",
    "cpe" : "cpe:/a:redhat:openshift_application_runtimes:1.0",
    "package" : "tomcat"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Decision Manager 7",
    "fix_state" : "Not affected",
    "package_name" : "tomcat",
    "cpe" : "cpe:/a:redhat:jboss_enterprise_brms_platform:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 5",
    "fix_state" : "Not affected",
    "package_name" : "tomcat5",
    "cpe" : "cpe:/o:redhat:enterprise_linux:5"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Not affected",
    "package_name" : "tomcat6",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "tomcat",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Fix deferred",
    "package_name" : "pki-deps:10.6/pki-servlet-engine",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "impact" : "low"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "tomcat",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat JBoss Data Grid 6",
    "fix_state" : "Out of support scope",
    "package_name" : "jbossweb",
    "cpe" : "cpe:/a:redhat:jboss_data_grid:6"
  }, {
    "product_name" : "Red Hat JBoss Data Virtualization 6",
    "fix_state" : "Out of support scope",
    "package_name" : "jbossweb",
    "cpe" : "cpe:/a:redhat:jboss_data_virtualization:6"
  }, {
    "product_name" : "Red Hat JBoss Enterprise Application Platform 6",
    "fix_state" : "Out of support scope",
    "package_name" : "jbossweb",
    "cpe" : "cpe:/a:redhat:jboss_enterprise_application_platform:6"
  }, {
    "product_name" : "Red Hat JBoss Fuse 6",
    "fix_state" : "Out of support scope",
    "package_name" : "tomcat",
    "cpe" : "cpe:/a:redhat:jboss_fuse:6"
  }, {
    "product_name" : "Red Hat JBoss Web Server 3",
    "fix_state" : "Not affected",
    "package_name" : "tomcat",
    "cpe" : "cpe:/a:redhat:jboss_enterprise_web_server:3"
  }, {
    "product_name" : "Red Hat OpenStack Platform 10 (Newton)",
    "fix_state" : "Not affected",
    "package_name" : "opendaylight",
    "cpe" : "cpe:/a:redhat:openstack:10"
  }, {
    "product_name" : "Red Hat OpenStack Platform 13 (Queens)",
    "fix_state" : "Not affected",
    "package_name" : "opendaylight",
    "cpe" : "cpe:/a:redhat:openstack:13"
  }, {
    "product_name" : "Red Hat Process Automation 7",
    "fix_state" : "Not affected",
    "package_name" : "tomcat",
    "cpe" : "cpe:/a:redhat:jboss_enterprise_bpms_platform:7"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2020-17527\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-17527\nhttp://tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.0.0-M10\nhttp://tomcat.apache.org/security-8.html#Fixed_in_Apache_Tomcat_8.5.60\nhttp://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.40" ],
  "name" : "CVE-2020-17527",
  "csaw" : false
}