CVE-2021-42340
Fixed in a distro release EPSS 12%
The fix for bug 63362 present in Apache Tomcat 10.1.0-M1 to 10.1.0-M5, 10.0.0-M1 to 10.0.11, 9.0.40 to 9.0.53 and 8.5.60 to 8.5.71 introduced a memory leak. The object introduced to collect metrics for HTTP upgrade connections was not released for WebSocket connections once the connection was closed. This created a memory leak that, over time, could lead to a denial of service via an OutOfMemoryError.
Products: Apache Software Foundation Apache Tomcat
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| Maven | org.apache.tomcat:tomcat | 10.1.0-M6 |
| Maven | org.apache.tomcat:tomcat | 10.0.12 |
| Maven | org.apache.tomcat:tomcat | 9.0.54 |
| Maven | org.apache.tomcat:tomcat | 8.5.72 |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Arch Linux | tomcat10 | 10.0.12-1 |
| Arch Linux | tomcat9 | 9.0.54-1 |
| Debian 11 | tomcat9 | 9.0.43-2~deb11u3 |
| Debian 12 | tomcat9 | 9.0.54-1 |
| Debian 13 | tomcat9 | 9.0.54-1 |
| Debian 14 | tomcat9 | 9.0.54-1 |
| Red Hat Enterprise Linux 9 | pki-servlet-4.0-api | 1:9.0.50-1.el9 |
| Red Hat Enterprise Linux 9 | pki-servlet-engine | 1:9.0.50-1.el9 |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat | 0:9.0.50-3.redhat_00004.1.el7jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat | 0:9.0.50-3.redhat_00004.1.el8jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-admin-webapps | 0:9.0.50-3.redhat_00004.1.el7jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-admin-webapps | 0:9.0.50-3.redhat_00004.1.el8jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-docs-webapp | 0:9.0.50-3.redhat_00004.1.el7jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-docs-webapp | 0:9.0.50-3.redhat_00004.1.el8jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-el-3.0-api | 0:9.0.50-3.redhat_00004.1.el7jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-el-3.0-api | 0:9.0.50-3.redhat_00004.1.el8jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-java-jdk11 | 0:9.0.50-3.redhat_00004.1.el7jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-java-jdk8 | 0:9.0.50-3.redhat_00004.1.el7jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-javadoc | 0:9.0.50-3.redhat_00004.1.el7jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-javadoc | 0:9.0.50-3.redhat_00004.1.el8jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-jsp-2.3-api | 0:9.0.50-3.redhat_00004.1.el8jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-jsp-2.3-api | 0:9.0.50-3.redhat_00004.1.el7jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-lib | 0:9.0.50-3.redhat_00004.1.el8jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-lib | 0:9.0.50-3.redhat_00004.1.el7jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-native | 0:1.2.30-3.redhat_3.el8jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-native | 0:1.2.30-3.redhat_3.el7jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-native-debuginfo | 0:1.2.30-3.redhat_3.el7jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-native-debuginfo | 0:1.2.30-3.redhat_3.el8jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-selinux | 0:9.0.50-3.redhat_00004.1.el8jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-selinux | 0:9.0.50-3.redhat_00004.1.el7jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-servlet-4.0-api | 0:9.0.50-3.redhat_00004.1.el7jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-servlet-4.0-api | 0:9.0.50-3.redhat_00004.1.el8jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-vault | 0:1.1.8-4.Final_redhat_00004.1.el7jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-vault | 0:1.1.8-4.Final_redhat_00004.1.el8jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-vault-javadoc | 0:1.1.8-4.Final_redhat_00004.1.el8jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-vault-javadoc | 0:1.1.8-4.Final_redhat_00004.1.el7jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-webapps | 0:9.0.50-3.redhat_00004.1.el8jws |
| Red Hat jboss enterprise web server 5.6 | jws5-tomcat-webapps | 0:9.0.50-3.redhat_00004.1.el7jws |
| Ubuntu 22.04 LTS | tomcat9 | no fix |
| Ubuntu 24.04 LTS | tomcat9 | no fix |
| Ubuntu 25.04 | tomcat9 | no fix |
| Ubuntu Pro 16.04 LTS | tomcat8 | no fix |
| Ubuntu Pro 18.04 LTS | tomcat8 | no fix |
| Ubuntu Pro 18.04 LTS | tomcat9 | no fix |
| Ubuntu Pro 20.04 LTS | tomcat9 | no fix |