{
  "cveId": "CVE-2021-33037",
  "url": "https://patchblox.com/security/cve/CVE-2021-33037",
  "summary": "CVE-2021-33037 is fixed in 15 products on 1 platform, first by libtomcat9-embed-java 9.0.16-3ubuntu0.18.04.2, released September 16, 2021. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "tomcat9-docs: Apache Tomcat 10.0.0-M1 to 10.0.6, 9.0.0.M1 to 9.0.46 and 8.5.0 to 8.5.66 did not correctly parse the HTTP transfer-e...",
  "description": "Apache Tomcat 10.0.0-M1 to 10.0.6, 9.0.0.M1 to 9.0.46 and 8.5.0 to 8.5.66 did not correctly parse the HTTP transfer-encoding request header in some circumstances leading to the possibility to request smuggling when used with a reverse proxy. Specifically: - Tomcat incorrectly ignored the transfer encoding header if the client declared it would only accept an HTTP/1.0 response; - Tomcat honoured the identify encoding; and - Tomcat did not ensure that, if present, the chunked encoding was the final encoding.",
  "published": "2021-07-12T08:15:00Z",
  "severity": "Medium",
  "epss": 0.74667,
  "epssPercentile": 0.99504,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libtomcat9-embed-java",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "9.0.16-3ubuntu0.18.04.2",
      "fix": "libtomcat9-embed-java 9.0.16-3ubuntu0.18.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libtomcat9-embed-java-9.0.16-3ubuntu0.18.04.2",
      "released": "2021-09-16T08:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libtomcat9-embed-java",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "9.0.31-1ubuntu0.2",
      "fix": "libtomcat9-embed-java 9.0.31-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libtomcat9-embed-java-9.0.31-1ubuntu0.2",
      "released": "2021-09-16T08:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libtomcat9-java",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "9.0.16-3ubuntu0.18.04.2",
      "fix": "libtomcat9-java 9.0.16-3ubuntu0.18.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libtomcat9-java-9.0.16-3ubuntu0.18.04.2",
      "released": "2021-09-16T08:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libtomcat9-java",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "9.0.31-1ubuntu0.2",
      "fix": "libtomcat9-java 9.0.31-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libtomcat9-java-9.0.31-1ubuntu0.2",
      "released": "2021-09-16T08:15:00Z"
    },
    {
      "platform": "linux",
      "product": "tomcat9",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "9.0.16-3ubuntu0.18.04.2",
      "fix": "tomcat9 9.0.16-3ubuntu0.18.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-tomcat9-9.0.16-3ubuntu0.18.04.2",
      "released": "2021-09-16T08:15:00Z"
    },
    {
      "platform": "linux",
      "product": "tomcat9",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "9.0.31-1ubuntu0.2",
      "fix": "tomcat9 9.0.31-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-tomcat9-9.0.31-1ubuntu0.2",
      "released": "2021-09-16T08:15:00Z"
    },
    {
      "platform": "linux",
      "product": "tomcat9",
      "release": "amzn 2023",
      "fixedVersion": "1:9.0.64-1.amzn2023.0.2",
      "fix": "ALAS2023-2023-059",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-059",
      "released": "2023-02-17T20:45:00Z"
    },
    {
      "platform": "linux",
      "product": "tomcat9-admin",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "9.0.16-3ubuntu0.18.04.2",
      "fix": "tomcat9-admin 9.0.16-3ubuntu0.18.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-tomcat9-admin-9.0.16-3ubuntu0.18.04.2",
      "released": "2021-09-16T08:15:00Z"
    },
    {
      "platform": "linux",
      "product": "tomcat9-admin",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "9.0.31-1ubuntu0.2",
      "fix": "tomcat9-admin 9.0.31-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-tomcat9-admin-9.0.31-1ubuntu0.2",
      "released": "2021-09-16T08:15:00Z"
    },
    {
      "platform": "linux",
      "product": "tomcat9-admin-webapps",
      "release": "amzn 2023",
      "fixedVersion": "1:9.0.64-1.amzn2023.0.2",
      "fix": "ALAS2023-2023-059",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-059",
      "released": "2023-02-17T20:45:00Z"
    },
    {
      "platform": "linux",
      "product": "tomcat9-common",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "9.0.16-3ubuntu0.18.04.2",
      "fix": "tomcat9-common 9.0.16-3ubuntu0.18.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-tomcat9-common-9.0.16-3ubuntu0.18.04.2",
      "released": "2021-09-16T08:15:00Z"
    },
    {
      "platform": "linux",
      "product": "tomcat9-common",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "9.0.31-1ubuntu0.2",
      "fix": "tomcat9-common 9.0.31-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-tomcat9-common-9.0.31-1ubuntu0.2",
      "released": "2021-09-16T08:15:00Z"
    },
    {
      "platform": "linux",
      "product": "tomcat9-docs",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "9.0.16-3ubuntu0.18.04.2",
      "fix": "tomcat9-docs 9.0.16-3ubuntu0.18.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-tomcat9-docs-9.0.16-3ubuntu0.18.04.2",
      "released": "2021-09-16T08:15:00Z"
    },
    {
      "platform": "linux",
      "product": "tomcat9-docs",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "9.0.31-1ubuntu0.2",
      "fix": "tomcat9-docs 9.0.31-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-tomcat9-docs-9.0.31-1ubuntu0.2",
      "released": "2021-09-16T08:15:00Z"
    },
    {
      "platform": "linux",
      "product": "tomcat9-docs-webapp",
      "release": "amzn 2023",
      "fixedVersion": "1:9.0.64-1.amzn2023.0.2",
      "fix": "ALAS2023-2023-059",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-059",
      "released": "2023-02-17T20:45:00Z"
    },
    {
      "platform": "linux",
      "product": "tomcat9-el-3.0-api",
      "release": "amzn 2023",
      "fixedVersion": "1:9.0.64-1.amzn2023.0.2",
      "fix": "ALAS2023-2023-059",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-059",
      "released": "2023-02-17T20:45:00Z"
    },
    {
      "platform": "linux",
      "product": "tomcat9-examples",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "9.0.16-3ubuntu0.18.04.2",
      "fix": "tomcat9-examples 9.0.16-3ubuntu0.18.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-tomcat9-examples-9.0.16-3ubuntu0.18.04.2",
      "released": "2021-09-16T08:15:00Z"
    },
    {
      "platform": "linux",
      "product": "tomcat9-examples",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "9.0.31-1ubuntu0.2",
      "fix": "tomcat9-examples 9.0.31-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-tomcat9-examples-9.0.31-1ubuntu0.2",
      "released": "2021-09-16T08:15:00Z"
    },
    {
      "platform": "linux",
      "product": "tomcat9-jsp-2.3-api",
      "release": "amzn 2023",
      "fixedVersion": "1:9.0.64-1.amzn2023.0.2",
      "fix": "ALAS2023-2023-059",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-059",
      "released": "2023-02-17T20:45:00Z"
    },
    {
      "platform": "linux",
      "product": "tomcat9-lib",
      "release": "amzn 2023",
      "fixedVersion": "1:9.0.64-1.amzn2023.0.2",
      "fix": "ALAS2023-2023-059",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-059",
      "released": "2023-02-17T20:45:00Z"
    },
    {
      "platform": "linux",
      "product": "tomcat9-servlet-4.0-api",
      "release": "amzn 2023",
      "fixedVersion": "1:9.0.64-1.amzn2023.0.2",
      "fix": "ALAS2023-2023-059",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-059",
      "released": "2023-02-17T20:45:00Z"
    },
    {
      "platform": "linux",
      "product": "tomcat9-user",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "9.0.16-3ubuntu0.18.04.2",
      "fix": "tomcat9-user 9.0.16-3ubuntu0.18.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-tomcat9-user-9.0.16-3ubuntu0.18.04.2",
      "released": "2021-09-16T08:15:00Z"
    },
    {
      "platform": "linux",
      "product": "tomcat9-user",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "9.0.31-1ubuntu0.2",
      "fix": "tomcat9-user 9.0.31-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-tomcat9-user-9.0.31-1ubuntu0.2",
      "released": "2021-09-16T08:15:00Z"
    },
    {
      "platform": "linux",
      "product": "tomcat9-webapps",
      "release": "amzn 2023",
      "fixedVersion": "1:9.0.64-1.amzn2023.0.2",
      "fix": "ALAS2023-2023-059",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-059",
      "released": "2023-02-17T20:45:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}