USN-4448-1: Tomcat vulnerabilities

4 August 2020

Several security issues were fixed in Tomcat.

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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)

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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.

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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.

References

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