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USN-4448-1: Tomcat vulnerabilities

4 August 2020

Several security issues were fixed in Tomcat.

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Releases

Packages

Details

It was discovered that Tomcat incorrectly validated the payload length in
a WebSocket frame. A remote attacker could possibly use this issue to cause
Tomcat to hang, resulting in a denial of service. (CVE-2020-13935)

It was discovered that Tomcat incorrectly handled HTTP header parsing. In
certain environments where Tomcat is located behind a reverse proxy, a
remote attacker could possibly use this issue to perform HTTP Reqest
Smuggling. (CVE-2020-1935)

It was discovered that Tomcat incorrectly handled certain uncommon
PersistenceManager with FileStore configurations. A remote attacker could
possibly use this issue to execute arbitrary code. (CVE-2020-9484)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 16.04

In general, a standard system update will make all the necessary changes.

Related notices

  • USN-4596-1: tomcat9-admin, tomcat9-user, tomcat9-examples, tomcat9-common, tomcat9, tomcat9-docs, libtomcat9-java, libtomcat9-embed-java
  • USN-5360-1: tomcat9-admin, tomcat9-user, tomcat9-examples, tomcat9-common, tomcat9, tomcat9-docs, libtomcat9-java, libtomcat9-embed-java