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AUSCERT External Security Bulletin Redistribution
USN-4355-1: PulseAudio vulnerability
13 May 2020
AusCERT Security Bulletin Summary
Operating System: Ubuntu
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Access Confidential Data -- Remote with User Interaction
Unauthorised Access -- Remote with User Interaction
CVE Names: CVE-2020-11931
Comment: This advisory references vulnerabilities in products which run on
platforms other than Ubuntu. It is recommended that administrators
running PulseAudio check for an updated version of the software for
their operating system.
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USN-4355-1: PulseAudio vulnerability
12 May 2020
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 20.04 LTS
o Ubuntu 19.10
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
PulseAudio could allow unintended access to snap packages.
o 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.
The problem can be corrected by updating your system to the following package
Ubuntu 20.04 LTS
pulseaudio - 1:13.99.1-1ubuntu3.2
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
To update your system, please follow these instructions: https://
After a standard system update you need to restart your session to make all the
o LP: 1877102
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