# CVE-2021-41079: libtomcat8-embed-java: Apache Tomcat 8.5.0 to 8.5.63, 9.0.0-M1 to 9.0.43 and 10.0.0-M1 to 10.0.2 did not properly validate incoming TLS packets

CVE-2021-41079 is fixed in 16 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.

- Web page: https://patchblox.com/security/cve/CVE-2021-41079
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0718
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 16, 2021

## Description

Apache Tomcat 8.5.0 to 8.5.63, 9.0.0-M1 to 9.0.43 and 10.0.0-M1 to 10.0.2 did not properly validate incoming TLS packets. When Tomcat was configured to use NIO+OpenSSL or NIO2+OpenSSL for TLS, a specially crafted packet could be used to trigger an infinite loop resulting in a denial of service.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libtomcat8-embed-java Ubuntu 18.04.6 LTS (bionic) | 8.5.39-1ubuntu1~18.04.3+esm2 | [libtomcat8-embed-java 8.5.39-1ubuntu1~18.04.3+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libtomcat8-embed-java-8.5.39-1ubuntu1-18.04.3-esm2.md) | May 12, 2022 |
| Linux | libtomcat8-java Ubuntu 18.04.6 LTS (bionic) | 8.5.39-1ubuntu1~18.04.3+esm2 | [libtomcat8-java 8.5.39-1ubuntu1~18.04.3+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libtomcat8-java-8.5.39-1ubuntu1-18.04.3-esm2.md) | May 12, 2022 |
| Linux | libtomcat9-embed-java Ubuntu 18.04.6 LTS (bionic) | 9.0.16-3ubuntu0.18.04.2 | [libtomcat9-embed-java 9.0.16-3ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libtomcat9-embed-java-9.0.16-3ubuntu0.18.04.2.md) | Sep 16, 2021 |
| Linux | libtomcat9-embed-java Ubuntu 20.04 LTS (focal) | 9.0.31-1ubuntu0.2 | [libtomcat9-embed-java 9.0.31-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libtomcat9-embed-java-9.0.31-1ubuntu0.2.md) | Sep 16, 2021 |
| Linux | libtomcat9-java Ubuntu 18.04.6 LTS (bionic) | 9.0.16-3ubuntu0.18.04.2 | [libtomcat9-java 9.0.16-3ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libtomcat9-java-9.0.16-3ubuntu0.18.04.2.md) | Sep 16, 2021 |
| Linux | libtomcat9-java Ubuntu 20.04 LTS (focal) | 9.0.31-1ubuntu0.2 | [libtomcat9-java 9.0.31-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libtomcat9-java-9.0.31-1ubuntu0.2.md) | Sep 16, 2021 |
| Linux | tomcat8 Ubuntu 18.04.6 LTS (bionic) | 8.5.39-1ubuntu1~18.04.3+esm2 | [tomcat8 8.5.39-1ubuntu1~18.04.3+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tomcat8-8.5.39-1ubuntu1-18.04.3-esm2.md) | May 12, 2022 |
| Linux | tomcat8-admin Ubuntu 18.04.6 LTS (bionic) | 8.5.39-1ubuntu1~18.04.3+esm2 | [tomcat8-admin 8.5.39-1ubuntu1~18.04.3+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tomcat8-admin-8.5.39-1ubuntu1-18.04.3-esm2.md) | May 12, 2022 |
| Linux | tomcat8-common Ubuntu 18.04.6 LTS (bionic) | 8.5.39-1ubuntu1~18.04.3+esm2 | [tomcat8-common 8.5.39-1ubuntu1~18.04.3+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tomcat8-common-8.5.39-1ubuntu1-18.04.3-esm2.md) | May 12, 2022 |
| Linux | tomcat8-docs Ubuntu 18.04.6 LTS (bionic) | 8.5.39-1ubuntu1~18.04.3+esm2 | [tomcat8-docs 8.5.39-1ubuntu1~18.04.3+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tomcat8-docs-8.5.39-1ubuntu1-18.04.3-esm2.md) | May 12, 2022 |
| Linux | tomcat8-examples Ubuntu 18.04.6 LTS (bionic) | 8.5.39-1ubuntu1~18.04.3+esm2 | [tomcat8-examples 8.5.39-1ubuntu1~18.04.3+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tomcat8-examples-8.5.39-1ubuntu1-18.04.3-esm2.md) | May 12, 2022 |
| Linux | tomcat8-user Ubuntu 18.04.6 LTS (bionic) | 8.5.39-1ubuntu1~18.04.3+esm2 | [tomcat8-user 8.5.39-1ubuntu1~18.04.3+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tomcat8-user-8.5.39-1ubuntu1-18.04.3-esm2.md) | May 12, 2022 |
| Linux | tomcat9 Ubuntu 18.04.6 LTS (bionic) | 9.0.16-3ubuntu0.18.04.2 | [tomcat9 9.0.16-3ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tomcat9-9.0.16-3ubuntu0.18.04.2.md) | Sep 16, 2021 |
| Linux | tomcat9 Ubuntu 20.04 LTS (focal) | 9.0.31-1ubuntu0.2 | [tomcat9 9.0.31-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-tomcat9-9.0.31-1ubuntu0.2.md) | Sep 16, 2021 |
| Linux | tomcat9-admin Ubuntu 18.04.6 LTS (bionic) | 9.0.16-3ubuntu0.18.04.2 | [tomcat9-admin 9.0.16-3ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tomcat9-admin-9.0.16-3ubuntu0.18.04.2.md) | Sep 16, 2021 |
| Linux | tomcat9-admin Ubuntu 20.04 LTS (focal) | 9.0.31-1ubuntu0.2 | [tomcat9-admin 9.0.31-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-tomcat9-admin-9.0.31-1ubuntu0.2.md) | Sep 16, 2021 |
| Linux | tomcat9-common Ubuntu 18.04.6 LTS (bionic) | 9.0.16-3ubuntu0.18.04.2 | [tomcat9-common 9.0.16-3ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tomcat9-common-9.0.16-3ubuntu0.18.04.2.md) | Sep 16, 2021 |
| Linux | tomcat9-common Ubuntu 20.04 LTS (focal) | 9.0.31-1ubuntu0.2 | [tomcat9-common 9.0.31-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-tomcat9-common-9.0.31-1ubuntu0.2.md) | Sep 16, 2021 |
| Linux | tomcat9-docs Ubuntu 18.04.6 LTS (bionic) | 9.0.16-3ubuntu0.18.04.2 | [tomcat9-docs 9.0.16-3ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tomcat9-docs-9.0.16-3ubuntu0.18.04.2.md) | Sep 16, 2021 |
| Linux | tomcat9-docs Ubuntu 20.04 LTS (focal) | 9.0.31-1ubuntu0.2 | [tomcat9-docs 9.0.31-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-tomcat9-docs-9.0.31-1ubuntu0.2.md) | Sep 16, 2021 |
| Linux | tomcat9-examples Ubuntu 18.04.6 LTS (bionic) | 9.0.16-3ubuntu0.18.04.2 | [tomcat9-examples 9.0.16-3ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tomcat9-examples-9.0.16-3ubuntu0.18.04.2.md) | Sep 16, 2021 |
| Linux | tomcat9-examples Ubuntu 20.04 LTS (focal) | 9.0.31-1ubuntu0.2 | [tomcat9-examples 9.0.31-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-tomcat9-examples-9.0.31-1ubuntu0.2.md) | Sep 16, 2021 |
| Linux | tomcat9-user Ubuntu 18.04.6 LTS (bionic) | 9.0.16-3ubuntu0.18.04.2 | [tomcat9-user 9.0.16-3ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tomcat9-user-9.0.16-3ubuntu0.18.04.2.md) | Sep 16, 2021 |
| Linux | tomcat9-user Ubuntu 20.04 LTS (focal) | 9.0.31-1ubuntu0.2 | [tomcat9-user 9.0.31-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-tomcat9-user-9.0.31-1ubuntu0.2.md) | Sep 16, 2021 |

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