=========================================================================Ubuntu Security Notice USN-4640-1
November 23, 2020

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

- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

PulseAudio could be made to expose sensitive information.

Software Description:
- pulseaudio: PulseAudio sound server

Details:

James Henstridge discovered that an Ubuntu-specific patch caused
PulseAudio to incorrectly handle snap client connections. An attacker
could possibly use this to expose sensitive information.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.10:
  libpulse-mainloop-glib0         1:13.99.2-1ubuntu2.1
  libpulse0                       1:13.99.2-1ubuntu2.1
  libpulsedsp                     1:13.99.2-1ubuntu2.1
  pulseaudio                      1:13.99.2-1ubuntu2.1
  pulseaudio-equalizer            1:13.99.2-1ubuntu2.1
  pulseaudio-module-bluetooth     1:13.99.2-1ubuntu2.1
  pulseaudio-module-gsettings     1:13.99.2-1ubuntu2.1
  pulseaudio-module-jack          1:13.99.2-1ubuntu2.1
  pulseaudio-module-lirc          1:13.99.2-1ubuntu2.1
  pulseaudio-module-raop          1:13.99.2-1ubuntu2.1
  pulseaudio-module-zeroconf      1:13.99.2-1ubuntu2.1
  pulseaudio-utils                1:13.99.2-1ubuntu2.1

Ubuntu 20.04 LTS:
  libpulse-mainloop-glib0         1:13.99.1-1ubuntu3.8
  libpulse0                       1:13.99.1-1ubuntu3.8
  libpulsedsp                     1:13.99.1-1ubuntu3.8
  pulseaudio                      1:13.99.1-1ubuntu3.8
  pulseaudio-equalizer            1:13.99.1-1ubuntu3.8
  pulseaudio-module-bluetooth     1:13.99.1-1ubuntu3.8
  pulseaudio-module-gsettings     1:13.99.1-1ubuntu3.8
  pulseaudio-module-jack          1:13.99.1-1ubuntu3.8
  pulseaudio-module-lirc          1:13.99.1-1ubuntu3.8
  pulseaudio-module-raop          1:13.99.1-1ubuntu3.8
  pulseaudio-module-zeroconf      1:13.99.1-1ubuntu3.8
  pulseaudio-utils                1:13.99.1-1ubuntu3.8

Ubuntu 18.04 LTS:
  libpulse-mainloop-glib0         1:11.1-1ubuntu7.11
  libpulse0                       1:11.1-1ubuntu7.11
  libpulsedsp                     1:11.1-1ubuntu7.11
  pulseaudio                      1:11.1-1ubuntu7.11
  pulseaudio-equalizer            1:11.1-1ubuntu7.11
  pulseaudio-esound-compat        1:11.1-1ubuntu7.11
  pulseaudio-module-bluetooth     1:11.1-1ubuntu7.11
  pulseaudio-module-gconf         1:11.1-1ubuntu7.11
  pulseaudio-module-jack          1:11.1-1ubuntu7.11
  pulseaudio-module-lirc          1:11.1-1ubuntu7.11
  pulseaudio-module-raop          1:11.1-1ubuntu7.11
  pulseaudio-module-zeroconf      1:11.1-1ubuntu7.11
  pulseaudio-utils                1:11.1-1ubuntu7.11

Ubuntu 16.04 LTS:
  libpulse-mainloop-glib0         1:8.0-0ubuntu3.15
  libpulse0                       1:8.0-0ubuntu3.15
  libpulsedsp                     1:8.0-0ubuntu3.15
  pulseaudio                      1:8.0-0ubuntu3.15
  pulseaudio-esound-compat        1:8.0-0ubuntu3.15
  pulseaudio-module-bluetooth     1:8.0-0ubuntu3.15
  pulseaudio-module-droid         1:8.0-0ubuntu3.15
  pulseaudio-module-gconf         1:8.0-0ubuntu3.15
  pulseaudio-module-jack          1:8.0-0ubuntu3.15
  pulseaudio-module-lirc          1:8.0-0ubuntu3.15
  pulseaudio-module-raop          1:8.0-0ubuntu3.15
  pulseaudio-module-trust-store   1:8.0-0ubuntu3.15
  pulseaudio-module-x11           1:8.0-0ubuntu3.15
  pulseaudio-module-zeroconf      1:8.0-0ubuntu3.15
  pulseaudio-utils                1:8.0-0ubuntu3.15

After a standard system update you need to restart your session to make
all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-4640-1
  CVE-2020-16123

Package Information:
  https://launchpad.net/ubuntu/+source/pulseaudio/1:13.99.2-1ubuntu2.1
  https://launchpad.net/ubuntu/+source/pulseaudio/1:13.99.1-1ubuntu3.8
  https://launchpad.net/ubuntu/+source/pulseaudio/1:11.1-1ubuntu7.11
  https://launchpad.net/ubuntu/+source/pulseaudio/1:8.0-0ubuntu3.15