usn-4355-1
Vulnerability from osv_ubuntu
Published
2020-05-12 19:25
Modified
2026-04-22 07:36
Summary
pulseaudio vulnerability
Details

PulseAudio in Ubuntu contains additional functionality to mediate audio recording for snap packages and it was discovered that this functionality did not mediate PulseAudio module unloading. An attacker-controlled snap with only the audio-playback interface connected could exploit this to bypass access controls and record audio.

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2020-11931",
              "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"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:16.04:LTS"
        }
      },
      "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"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2020-11931",
              "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"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:18.04:LTS"
        }
      },
      "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"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2020-11931",
              "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"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:20.04:LTS"
        }
      },
      "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": "PulseAudio in Ubuntu contains additional functionality to mediate audio\nrecording for snap packages and it was discovered that this functionality\ndid not mediate PulseAudio module unloading. An attacker-controlled snap\nwith only the audio-playback interface connected could exploit this to\nbypass access controls and record audio.\n",
  "id": "USN-4355-1",
  "modified": "2026-04-22T07:36:38Z",
  "published": "2020-05-12T19:25:07Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4355-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-11931"
    },
    {
      "type": "REPORT",
      "url": "https://launchpad.net/bugs/1877102"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "pulseaudio vulnerability",
  "upstream": [
    "UBUNTU-CVE-2020-11931"
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.