What is CVE-2020-16123?

CVE-2020-16123 is a medium-severity vulnerability in Canonical Pulseaudio, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 4.4/10. Published 2020-12-04.

How severe is CVE-2020-16123?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Vulnerability in Canonical Pulseaudio

CVE-2020-16123

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.

Vulnerability class: Race Condition

EPSS: 0.003 (23.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N.

Affected products

Canonical Pulseaudio — versions 1:13.99.3-1, 1:13.99.2-1, 1:13.99.1-1
Canonical Ubuntu_linux — versions 16.04, 18.04, 20.04

Weakness classification (CWE)

CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)

References

security@ubuntu.com (x_refsource_UBUNTU, Exploit, vendor-advisory, Third Party Advisory, Issue Tracking)
security@ubuntu.com (x_refsource_UBUNTU, vendor-advisory, Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2020-16123?: CVE-2020-16123 is a medium-severity vulnerability in Canonical Pulseaudio, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 4.4/10. Published 2020-12-04.
How severe is CVE-2020-16123?: Medium severity. CVSS v3 base score is 4.4 out of 10.