Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : libpng vulnerabilities (USN-8035-1)

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8035-1 advisory. It was discovered that the libpng simplified API incorrectly processed palette PNG images with partial transparency and gamma...