CVE-2020-16123
Bypass of snapd pulseaudio restrictions
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 1:13.99.3-1ubuntu2, 1:13.99.2-1ubuntu2.1, 1:13.99.1-1ubuntu3.8, 1:11.1-1ubuntu7.11, 1:8.0-0ubuntu3.15
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
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.
Timeline
- CVE published
- Record last updated
Affected versions
- Canonical pulseaudio
From 1:13.99.3-1 · fixed in 1:13.99.3-1ubuntu2; From 1:13.99.2-1 · fixed in 1:13.99.2-1ubuntu2.1; From 1:13.99.1-1 · fixed in 1:13.99.1-1ubuntu3.8; From 1:11.1-1 · fixed in 1:11.1-1ubuntu7.11; From 1:8.0-0 · fixed in 1:8.0-0ubuntu3.15