CVE-2020-11931 Ubuntu modifications to pulseaudio to provide snap security enforcement could be unloaded

What is CVE-2020-11931?

CVE-2020-11931 is a low-severity vulnerability in Canonical Ubuntu Linux, published on 15 May 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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;

Weakness: CWE-668, CWE-284

Which versions are affected by CVE-2020-11931?

It affects 2 products.

Products include Canonical Ubuntu Linux, Pulseaudio Pulseaudio.

How do I fix CVE-2020-11931?

Apply the vendor's patch.

Is CVE-2020-11931 being exploited?

There is no known exploitation of CVE-2020-11931 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-m777-7jfr-8wgh, UBUNTU-CVE-2020-11931, USN-4355-1.