ubuntu-cve-2020-11931
Vulnerability from osv_ubuntu
Published
2020-04-16 00:00
Modified
2026-04-22 07:39
Summary
Details

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;

Severity
3.3 (Low)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
3.3 (Low)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libpulse-mainloop-glib0",
            "binary_version": "1:8.0-0ubuntu3.12"
          },
          {
            "binary_name": "libpulse0",
            "binary_version": "1:8.0-0ubuntu3.12"
          },
          {
            "binary_name": "libpulsedsp",
            "binary_version": "1:8.0-0ubuntu3.12"
          },
          {
            "binary_name": "pulseaudio",
            "binary_version": "1:8.0-0ubuntu3.12"
          },
          {
            "binary_name": "pulseaudio-esound-compat",
            "binary_version": "1:8.0-0ubuntu3.12"
          },
          {
            "binary_name": "pulseaudio-module-bluetooth",
            "binary_version": "1:8.0-0ubuntu3.12"
          },
          {
            "binary_name": "pulseaudio-module-droid",
            "binary_version": "1:8.0-0ubuntu3.12"
          },
          {
            "binary_name": "pulseaudio-module-gconf",
            "binary_version": "1:8.0-0ubuntu3.12"
          },
          {
            "binary_name": "pulseaudio-module-jack",
            "binary_version": "1:8.0-0ubuntu3.12"
          },
          {
            "binary_name": "pulseaudio-module-lirc",
            "binary_version": "1:8.0-0ubuntu3.12"
          },
          {
            "binary_name": "pulseaudio-module-raop",
            "binary_version": "1:8.0-0ubuntu3.12"
          },
          {
            "binary_name": "pulseaudio-module-trust-store",
            "binary_version": "1:8.0-0ubuntu3.12"
          },
          {
            "binary_name": "pulseaudio-module-x11",
            "binary_version": "1:8.0-0ubuntu3.12"
          },
          {
            "binary_name": "pulseaudio-module-zeroconf",
            "binary_version": "1:8.0-0ubuntu3.12"
          },
          {
            "binary_name": "pulseaudio-utils",
            "binary_version": "1:8.0-0ubuntu3.12"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "pulseaudio",
        "purl": "pkg:deb/ubuntu/pulseaudio@1:8.0-0ubuntu3.12?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:8.0-0ubuntu3.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:6.0-0ubuntu13",
        "1:7.1-1ubuntu1",
        "1:7.1-1ubuntu2",
        "1:7.1-1ubuntu3",
        "1:7.1-1ubuntu6",
        "1:7.1-1ubuntu7",
        "1:8.0-0ubuntu2",
        "1:8.0-0ubuntu3",
        "1:8.0-0ubuntu3.1",
        "1:8.0-0ubuntu3.2",
        "1:8.0-0ubuntu3.3",
        "1:8.0-0ubuntu3.4",
        "1:8.0-0ubuntu3.7",
        "1:8.0-0ubuntu3.8",
        "1:8.0-0ubuntu3.9",
        "1:8.0-0ubuntu3.10",
        "1:8.0-0ubuntu3.11"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libpulse-mainloop-glib0",
            "binary_version": "1:11.1-1ubuntu7.7"
          },
          {
            "binary_name": "libpulse0",
            "binary_version": "1:11.1-1ubuntu7.7"
          },
          {
            "binary_name": "libpulsedsp",
            "binary_version": "1:11.1-1ubuntu7.7"
          },
          {
            "binary_name": "pulseaudio",
            "binary_version": "1:11.1-1ubuntu7.7"
          },
          {
            "binary_name": "pulseaudio-equalizer",
            "binary_version": "1:11.1-1ubuntu7.7"
          },
          {
            "binary_name": "pulseaudio-esound-compat",
            "binary_version": "1:11.1-1ubuntu7.7"
          },
          {
            "binary_name": "pulseaudio-module-bluetooth",
            "binary_version": "1:11.1-1ubuntu7.7"
          },
          {
            "binary_name": "pulseaudio-module-gconf",
            "binary_version": "1:11.1-1ubuntu7.7"
          },
          {
            "binary_name": "pulseaudio-module-jack",
            "binary_version": "1:11.1-1ubuntu7.7"
          },
          {
            "binary_name": "pulseaudio-module-lirc",
            "binary_version": "1:11.1-1ubuntu7.7"
          },
          {
            "binary_name": "pulseaudio-module-raop",
            "binary_version": "1:11.1-1ubuntu7.7"
          },
          {
            "binary_name": "pulseaudio-module-zeroconf",
            "binary_version": "1:11.1-1ubuntu7.7"
          },
          {
            "binary_name": "pulseaudio-utils",
            "binary_version": "1:11.1-1ubuntu7.7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "pulseaudio",
        "purl": "pkg:deb/ubuntu/pulseaudio@1:11.1-1ubuntu7.7?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:11.1-1ubuntu7.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:10.0-2ubuntu3",
        "1:11.1-1ubuntu1",
        "1:11.1-1ubuntu2",
        "1:11.1-1ubuntu4",
        "1:11.1-1ubuntu5",
        "1:11.1-1ubuntu6",
        "1:11.1-1ubuntu7",
        "1:11.1-1ubuntu7.1",
        "1:11.1-1ubuntu7.2",
        "1:11.1-1ubuntu7.4",
        "1:11.1-1ubuntu7.5"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libpulse-mainloop-glib0",
            "binary_version": "1:13.99.1-1ubuntu3.2"
          },
          {
            "binary_name": "libpulse0",
            "binary_version": "1:13.99.1-1ubuntu3.2"
          },
          {
            "binary_name": "libpulsedsp",
            "binary_version": "1:13.99.1-1ubuntu3.2"
          },
          {
            "binary_name": "pulseaudio",
            "binary_version": "1:13.99.1-1ubuntu3.2"
          },
          {
            "binary_name": "pulseaudio-equalizer",
            "binary_version": "1:13.99.1-1ubuntu3.2"
          },
          {
            "binary_name": "pulseaudio-module-bluetooth",
            "binary_version": "1:13.99.1-1ubuntu3.2"
          },
          {
            "binary_name": "pulseaudio-module-gsettings",
            "binary_version": "1:13.99.1-1ubuntu3.2"
          },
          {
            "binary_name": "pulseaudio-module-jack",
            "binary_version": "1:13.99.1-1ubuntu3.2"
          },
          {
            "binary_name": "pulseaudio-module-lirc",
            "binary_version": "1:13.99.1-1ubuntu3.2"
          },
          {
            "binary_name": "pulseaudio-module-raop",
            "binary_version": "1:13.99.1-1ubuntu3.2"
          },
          {
            "binary_name": "pulseaudio-module-zeroconf",
            "binary_version": "1:13.99.1-1ubuntu3.2"
          },
          {
            "binary_name": "pulseaudio-utils",
            "binary_version": "1:13.99.1-1ubuntu3.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "pulseaudio",
        "purl": "pkg:deb/ubuntu/pulseaudio@1:13.99.1-1ubuntu3.2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:13.99.1-1ubuntu3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:13.0-1ubuntu1",
        "1:13.0-1ubuntu4",
        "1:13.0-1ubuntu5",
        "1:13.0-3ubuntu1",
        "1:13.0-3ubuntu2",
        "1:13.99.1-1ubuntu1",
        "1:13.99.1-1ubuntu2",
        "1:13.99.1-1ubuntu3"
      ]
    }
  ],
  "aliases": [],
  "details": "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;",
  "id": "UBUNTU-CVE-2020-11931",
  "modified": "2026-04-22T07:39:22Z",
  "published": "2020-04-16T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-11931"
    },
    {
      "type": "REPORT",
      "url": "https://forum.snapcraft.io/t/audio-switcher-pulseaudio-interface-auto-connect-request/16648/3"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4355-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-11931"
    }
  ],
  "related": [
    "USN-4355-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2020-11931"
  ]
}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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