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.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-16123
Reference (s):
- UBUNTU:https://launchpad.net/bugs/1895928
- URL: https://launchpad.net/bugs/1895928
- UBUNTU:https://ubuntu.com/USN-4640-1
- URL: https://ubuntu.com/USN-4640-1