A dom4j security update has been released for Ubuntu 16.04 LTS.

USN-4575-1: dom4j vulnerability

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Ubuntu Security Notice USN-4575-1
October 13, 2020

dom4j vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS

Summary:

dom4j could be made to expose sensitive information or run programs if it
received specially crafted input.

Software Description:
- dom4j: Flexible XML framework for Java

Details:

It was discovered that dom4j incorrectly handled reading XML data. A
remote attacker could exploit this with a crafted XML file to expose
sensitive data or possibly execute arbitrary code. (CVE-2020-10683)

Update instructions:

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

Ubuntu 16.04 LTS:
libdom4j-java 1.6.1+dfsg.3-2ubuntu1.1

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

References:
  https://usn.ubuntu.com/4575-1
CVE-2020-10683

Package Information:
  https://launchpad.net/ubuntu/+source/dom4j/1.6.1+dfsg.3-2ubuntu1.1