CVE-2020-11931

Publication date 16 April 2020

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

3.3 · Low

Score breakdown

An Ubuntu-specific modification to Pulseaudio to provide security mediation for Snap-packaged applications was found to have a bypass of intended access restriction for snaps which plugs any of pulseaudio, audio-playback or audio-record via unloading the pulseaudio snap policy module. This issue affects: pulseaudio 1:8.0 versions prior to 1:8.0-0ubuntu3.12; 1:11.1 versions prior to 1:11.1-1ubuntu7.7; 1:13.0 versions prior to 1:13.0-1ubuntu1.2; 1:13.99.1 versions prior to 1:13.99.1-1ubuntu3.2;

Read the notes from the security team

Status

Package Ubuntu Release Status
pulseaudio 20.04 LTS focal
Fixed 1:13.99.1-1ubuntu3.2
19.10 eoan
Fixed 1:13.0-1ubuntu1.2
18.04 LTS bionic
Fixed 1:11.1-1ubuntu7.7
16.04 LTS xenial
Fixed 1:8.0-0ubuntu3.12
14.04 LTS trusty Not in release

Notes

jdstrand

semi-public on 2020-04-16 the snap policy module is not included upstream and currently only exists in Ubuntu. This module was added in 1:12.2-0ubuntu2 in 18.10. pulseaudio 1:8.0-0ubuntu3.11 on 16.04 LTS added enforcing mediation pulseaudio 1:11.1-1ubuntu7.5 on 18.04 LTS added enforcing mediation initial CVSS calculation: attackVector: local, attackComplexity: low priviliegesRequired: low, userInteraction: none, scope: unchanged, confidentialityImpact: low, integrityImpact: none, availabilityImpact: none

Severity score breakdown

Parameter Value
Base score 3.3 · Low
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality Low
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N