USN-3962-1: libpng vulnerability

30 April 2019

libpng1.6 vulnerability

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

  • Ubuntu 18.10
  • Ubuntu 18.04 LTS


libpng be made to crash or run programs if it opened a specially crafted file.

Software Description

  • libpng1.6 - PNG (Portable Network Graphics) file library


It was discovered that libpng incorrectly handled certain memory operations. If a user or automated system were tricked into opening a specially crafted PNG file, a remote attacker could use this issue to cause libpng to 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 18.10
libpng16-16 - 1.6.34-2ubuntu0.1
Ubuntu 18.04 LTS
libpng16-16 - 1.6.34-1ubuntu0.18.04.2

To update your system, please follow these instructions:

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