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

Quick assessment

Affected
Canonical pulseaudio
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PulseAudio是一款用于POSIX OS的开源音频系统。该系统主要用于音频传输等。 PulseAudio中存在访问控制错误漏洞。该漏洞源于网络系统或产品未正确限制来自未授权角色的资源访问。以下产品及版本受到影响：PulseAudio 1:8.0-0ubuntu3.12之前的1:8.0版本，1:11.1-1ubuntu7.7之前的1:11.1版本，1:13.0-1ubuntu1.2之前的1:13.0版本，1:13.99.1-1ubuntu3.2之前的1:13.99.1版本。

CVSS 3.3 · Low EPSS 0.33% · P24

Possible ATT&CK Techniques 2 AI

T1562.006 T1548.001 · Setuid and Setgid
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I. Basic Information for CVE-2020-11931

Vulnerability Information
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Vulnerability Title
Ubuntu modifications to pulseaudio to provide snap security enforcement could be unloaded
Source: CVE Program / CVE List V5
Vulnerability 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;
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
PulseAudio 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PulseAudio是一款用于POSIX OS的开源音频系统。该系统主要用于音频传输等。 PulseAudio中存在访问控制错误漏洞。该漏洞源于网络系统或产品未正确限制来自未授权角色的资源访问。以下产品及版本受到影响：PulseAudio 1:8.0-0ubuntu3.12之前的1:8.0版本，1:11.1-1ubuntu7.7之前的1:11.1版本，1:13.0-1ubuntu1.2之前的1:13.0版本，1:13.99.1-1ubuntu3.2之前的1:13.99.1版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Canonical pulseaudio 1:8.0 ~ 1:8.0-0ubuntu3.12 -

II. Public POCs for CVE-2020-11931

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III. Intelligence Information for CVE-2020-11931

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Vendor Advisories for CVE-2020-11931 (1)

Other References for CVE-2020-11931 (1)

IV. Related Vulnerabilities

Same product: pulseaudio
Same vendor: Canonical
Same weakness: CWE-284

V. Comments for CVE-2020-11931

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