A HTMLDOC security update has been released for Ubuntu Linux 16.04 LTS and 18.04 LTS.

USN-4696-1: HTMLDOC vulnerability

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Ubuntu Security Notice USN-4696-1
January 18, 2021

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

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

HTMLDOC could be made to denial of service if it received a specially
crafted HTML file.

Software Description:
- htmldoc: HTML processor that generates indexed HTML, PS, and PDF

Details:

It was discovered that HTMLDOC incorrectly handled certain HTML files.
An attacker could possibly use this issue to cause a denial of service.

Update instructions:

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

Ubuntu 18.04 LTS:
htmldoc 1.9.2-1ubuntu0.1

Ubuntu 16.04 LTS:
htmldoc 1.8.27-8ubuntu1.1

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

References:
  https://usn.ubuntu.com/4696-1
CVE-2019-19630

Package Information:
  https://launchpad.net/ubuntu/+source/htmldoc/1.9.2-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/htmldoc/1.8.27-8ubuntu1.1