USN-3962-1: libpng vulnerability

30 April 2019

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



  • 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
Ubuntu 18.04

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


Related notices

  • USN-3991-1: firefox
  • USN-3997-1: thunderbird
  • USN-4080-1: openjdk-8, openjdk-8-jre-jamvm, openjdk-8-jdk, openjdk-8-jre-headless, openjdk-8-jre, openjdk-8-jre-zero, openjdk-8-jdk-headless
  • USN-4083-1: openjdk-11-jre-headless, openjdk-lts, openjdk-11-jre-zero, openjdk-11-jdk, openjdk-11-jdk-headless, openjdk-11-jre