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Ubuntu 20.04: USN-4355-1 Critical: PulseAudio Snap Package Access Issue

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 Summary: PulseAudio could allow unintended access to snap packages. Software Description: - pulseaudio: PulseAudio sound server Details: 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. References: https://ubuntu.com/security/notices/USN-4355-1 CVE-2020-11931, https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1877102 Package Information: https://launchpad.net/ubuntu/+source/pulseaudio/1:13.99.1-1ubuntu3.2 https://launchpad.net/ubuntu/+source/pulseaudio/1:13.0-1ubuntu1.2 https://launchpad.net/ubuntu/+source/pulseaudio/1:11.1-1ubuntu7.7 https://launchpad.net/ubuntu/+source/pulseaudio/1:8.0-0ubuntu3.12 . A security flaw in PulseAudio on Ubuntu enables unauthorized entry to snap packages across various versions. Update needed.. PulseAudio, Security Notice, Snap Package Access, Ubuntu Security. . Severity:Critical. LinuxSecurity.com Team

May 12, 2020 •Critical Ubuntu