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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (22.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 22.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
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)
References
- launchpad.net/bugs/1895928 (Exploit, vendor-advisory, Third Party Advisory, Issue Tracking)
- ubuntu.com/USN-4640-1 (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.