Race Condition Affecting pulseaudio package, versions <1:8.0-0ubuntu3.15


Severity

Recommended
0.0
medium
0
10

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.05% (20th percentile)

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  • Snyk IDSNYK-UBUNTU1604-PULSEAUDIO-1043933
  • published24 Nov 2020
  • disclosed4 Dec 2020

Introduced: 24 Nov 2020

CVE-2020-16123  (opens in a new tab)
CWE-362  (opens in a new tab)

How to fix?

Upgrade Ubuntu:16.04 pulseaudio to version 1:8.0-0ubuntu3.15 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream pulseaudio package and not the pulseaudio package as distributed by Ubuntu. See How to fix? for Ubuntu:16.04 relevant fixed versions and status.

An Ubuntu-specific patch in PulseAudio created a race condition where the snap policy module would fail to identify a client connection from a snap as coming from a snap if SCM_CREDENTIALS were missing, allowing the snap to connect to PulseAudio without proper confinement. This could be exploited by an attacker to expose sensitive information. Fixed in 1:13.99.3-1ubuntu2, 1:13.99.2-1ubuntu2.1, 1:13.99.1-1ubuntu3.8, 1:11.1-1ubuntu7.11, and 1:8.0-0ubuntu3.15.

CVSS Scores

version 3.1