Ubuntu 20.04: 2021-f9e577cf85 Low: Media Service Security Update

arts (analog real-time synthesizer) is the sound system of KDE 3.

The principle of arts is to create/process sound using small modules which do

certain tasks. These may be create a waveform (oscillators), play samples,

filter data, add signals, perform effects like delay/flanger/chorus, or

output the data to the soundcard.

By connecting all those small modules together, you can perform complex

tasks like simulating a mixer, generating an instrument or things like

playing a wave file with some effects.

Security fix for CVE-2015-7543 in arts (the legacy aRts sound server): A temporary directory was being created insecurely using mktemp and mkdir, allowing an attacker to hijack the temporary directory and thus the inter- process communication (IPC). This update fixes the temporary directory creation to use the safe mkdtemp function instead.