# CVE-2019-0199: libtomcat8-embed-java: The HTTP/2 implementation in Apache Tomcat 9.0.0.M1 to 9.0.14 and 8.5.0 to 8.5.37 accepted streams with excessive num...

CVE-2019-0199 is fixed in 8 products on 1 platform, first by libtomcat8-embed-java 8.5.39-1ubuntu1~18.04.1, released April 10, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2019-0199
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.7286
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 10, 2019

## Description

The HTTP/2 implementation in Apache Tomcat 9.0.0.M1 to 9.0.14 and 8.5.0 to 8.5.37 accepted streams with excessive numbers of SETTINGS frames and also permitted clients to keep streams open without reading/writing request/response data. By keeping streams open for requests that utilised the Servlet API's blocking I/O, clients were able to cause server-side threads to block eventually leading to thread exhaustion and a DoS.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libtomcat8-embed-java Ubuntu 18.04.6 LTS (bionic) | 8.5.39-1ubuntu1~18.04.1 | [libtomcat8-embed-java 8.5.39-1ubuntu1~18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libtomcat8-embed-java-8.5.39-1ubuntu1-18.04.1.md) | Apr 10, 2019 |
| Linux | libtomcat8-java Ubuntu 18.04.6 LTS (bionic) | 8.5.39-1ubuntu1~18.04.1 | [libtomcat8-java 8.5.39-1ubuntu1~18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libtomcat8-java-8.5.39-1ubuntu1-18.04.1.md) | Apr 10, 2019 |
| Linux | tomcat8 Ubuntu 18.04.6 LTS (bionic) | 8.5.39-1ubuntu1~18.04.1 | [tomcat8 8.5.39-1ubuntu1~18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tomcat8-8.5.39-1ubuntu1-18.04.1.md) | Apr 10, 2019 |
| Linux | tomcat8-admin Ubuntu 18.04.6 LTS (bionic) | 8.5.39-1ubuntu1~18.04.1 | [tomcat8-admin 8.5.39-1ubuntu1~18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tomcat8-admin-8.5.39-1ubuntu1-18.04.1.md) | Apr 10, 2019 |
| Linux | tomcat8-common Ubuntu 18.04.6 LTS (bionic) | 8.5.39-1ubuntu1~18.04.1 | [tomcat8-common 8.5.39-1ubuntu1~18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tomcat8-common-8.5.39-1ubuntu1-18.04.1.md) | Apr 10, 2019 |
| Linux | tomcat8-docs Ubuntu 18.04.6 LTS (bionic) | 8.5.39-1ubuntu1~18.04.1 | [tomcat8-docs 8.5.39-1ubuntu1~18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tomcat8-docs-8.5.39-1ubuntu1-18.04.1.md) | Apr 10, 2019 |
| Linux | tomcat8-examples Ubuntu 18.04.6 LTS (bionic) | 8.5.39-1ubuntu1~18.04.1 | [tomcat8-examples 8.5.39-1ubuntu1~18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tomcat8-examples-8.5.39-1ubuntu1-18.04.1.md) | Apr 10, 2019 |
| Linux | tomcat8-user Ubuntu 18.04.6 LTS (bionic) | 8.5.39-1ubuntu1~18.04.1 | [tomcat8-user 8.5.39-1ubuntu1~18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tomcat8-user-8.5.39-1ubuntu1-18.04.1.md) | Apr 10, 2019 |

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