=========================================================================Ubuntu Security Notice USN-5005-1
July 05, 2021

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

- Ubuntu 18.04 LTS
- Ubuntu 16.04 ESM

Summary:

DjVuLibre could be made to crash or execute arbitrary code if it
opened a specially crafted file.

Software Description:
- djvulibre: DjVu image format library and tools

Details:

It was discovered that DjVuLibre incorrectly handled certain djvu files.
An attacker could possibly use this issue to execute arbitrary code or
cause a crash.

Update instructions:

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

Ubuntu 18.04 LTS:
  libdjvulibre21                  3.5.27.1-8ubuntu0.4

Ubuntu 16.04 ESM:
  libdjvulibre21                  3.5.27.1-5ubuntu0.1+esm2

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

References:
  https://ubuntu.com/security/notices/USN-5005-1
  CVE-2021-3630

Package Information:
  https://launchpad.net/ubuntu/+source/djvulibre/3.5.27.1-8ubuntu0.4