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    Ubuntu 4355-1: PulseAudio vulnerability

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    PulseAudio could allow unintended access to snap packages.
    Ubuntu Security Notice USN-4355-1
    May 12, 2020
    pulseaudio vulnerability
    A security issue affects these releases of Ubuntu and its derivatives:
    - Ubuntu 20.04 LTS
    - Ubuntu 19.10
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    PulseAudio could allow unintended access to snap packages.
    Software Description:
    - pulseaudio: PulseAudio sound server
    PulseAudio in Ubuntu contains additional functionality to mediate audio
    recording for snap packages and it was discovered that this functionality
    did not mediate PulseAudio module unloading. An attacker-controlled snap
    with only the audio-playback interface connected could exploit this to
    bypass access controls and record audio.
    Update instructions:
    The problem can be corrected by updating your system to the following
    package versions:
    Ubuntu 20.04 LTS:
      pulseaudio                      1:13.99.1-1ubuntu3.2
    Ubuntu 19.10:
      pulseaudio                      1:13.0-1ubuntu1.2
    Ubuntu 18.04 LTS:
      pulseaudio                      1:11.1-1ubuntu7.7
    Ubuntu 16.04 LTS:
      pulseaudio                      1:8.0-0ubuntu3.12
    After a standard system update you need to restart your session to make
    all the necessary changes.
    Package Information:

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