libtomcat9-embed-java: A specially crafted sequence of HTTP/2 requests sent to Apache Tomcat 10.0.0-M1 to 10.0.0-M5, 9.0.0.M1 to 9.0.35 and...
CVE-2020-11996 is fixed in 8 products on 1 platform, first by libtomcat9-embed-java 9.0.31-1ubuntu0.1, released July 14, 2020. It is not reported as exploited. Patch Radar priority: Routine.
A specially crafted sequence of HTTP/2 requests sent to Apache Tomcat 10.0.0-M1 to 10.0.0-M5, 9.0.0.M1 to 9.0.35 and 8.5.0 to 8.5.55 could trigger high CPU usage for several seconds. If a sufficient number of such requests were made on concurrent HTTP/2 connections, the server could become unresponsive.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libtomcat9-embed-java · Ubuntu 20.04 LTS (focal) | 9.0.31-1ubuntu0.1 | libtomcat9-embed-java 9.0.31-1ubuntu0.1 | Jul 14, 2020 |
| libtomcat9-java · Ubuntu 20.04 LTS (focal) | 9.0.31-1ubuntu0.1 | libtomcat9-java 9.0.31-1ubuntu0.1 | Jul 14, 2020 |
| tomcat9 · Ubuntu 20.04 LTS (focal) | 9.0.31-1ubuntu0.1 | tomcat9 9.0.31-1ubuntu0.1 | Jul 14, 2020 |
| tomcat9-admin · Ubuntu 20.04 LTS (focal) | 9.0.31-1ubuntu0.1 | tomcat9-admin 9.0.31-1ubuntu0.1 | Jul 14, 2020 |
| tomcat9-common · Ubuntu 20.04 LTS (focal) | 9.0.31-1ubuntu0.1 | tomcat9-common 9.0.31-1ubuntu0.1 | Jul 14, 2020 |
| tomcat9-docs · Ubuntu 20.04 LTS (focal) | 9.0.31-1ubuntu0.1 | tomcat9-docs 9.0.31-1ubuntu0.1 | Jul 14, 2020 |
| tomcat9-examples · Ubuntu 20.04 LTS (focal) | 9.0.31-1ubuntu0.1 | tomcat9-examples 9.0.31-1ubuntu0.1 | Jul 14, 2020 |
| tomcat9-user · Ubuntu 20.04 LTS (focal) | 9.0.31-1ubuntu0.1 | tomcat9-user 9.0.31-1ubuntu0.1 | Jul 14, 2020 |
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