=========================================================================Ubuntu Security Notice USN-4198-1
November 21, 2019

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

- Ubuntu 19.10
- Ubuntu 19.04
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in DjVuLibre.

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

Details:

It was discovered that DjVuLibre incorrectly handled certain memory
operations. If a user or automated system were tricked into processing a
specially crafted DjVu file, a remote attacker could cause applications
to hang or crash, resulting in a denial of service, or possibly execute
arbitrary code.

Update instructions:

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

Ubuntu 19.10:
  libdjvulibre21                  3.5.27.1-13ubuntu0.1

Ubuntu 19.04:
  libdjvulibre21                  3.5.27.1-10ubuntu0.1

Ubuntu 18.04 LTS:
  libdjvulibre21                  3.5.27.1-8ubuntu0.1

Ubuntu 16.04 LTS:
  libdjvulibre21                  3.5.27.1-5ubuntu0.1

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-4198-1
  CVE-2019-15142, CVE-2019-15143, CVE-2019-15144, CVE-2019-15145,
  CVE-2019-18804

Package Information:
  https://launchpad.net/ubuntu/+source/djvulibre/3.5.27.1-13ubuntu0.1
  https://launchpad.net/ubuntu/+source/djvulibre/3.5.27.1-10ubuntu0.1
  https://launchpad.net/ubuntu/+source/djvulibre/3.5.27.1-8ubuntu0.1
  https://launchpad.net/ubuntu/+source/djvulibre/3.5.27.1-5ubuntu0.1