USN-4073-1: libEBML vulnerability

25 July 2019

libebml vulnerability

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

  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS


libEBML could be made to crash if it opened a specially crafted file.

Software Description

  • libebml - library for the EBML format


It was discovered that libEBML incorrectly handled certain media files. If a user were tricked into opening a specially crafted media file, libEBML could possibly be made to crash, resulting in a denial of service.

Update instructions

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

Ubuntu 18.04 LTS
libebml4v5 - 1.3.5-2ubuntu0.1
Ubuntu 16.04 LTS
libebml4v5 - 1.3.3-1ubuntu0.1

To update your system, please follow these instructions:

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