ubuntu-cve-2020-16123
Vulnerability from osv_ubuntu
Published
2020-11-23 17:00
Modified
2026-04-22 07:39
Summary
Details

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.

Severity
4.7 (Medium)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
4.4 (Medium)
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/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": "1:8.0-0ubuntu3.15"
          },
          {
            "binary_name": "libpulse0",
            "binary_version": "1:8.0-0ubuntu3.15"
          },
          {
            "binary_name": "libpulsedsp",
            "binary_version": "1:8.0-0ubuntu3.15"
          },
          {
            "binary_name": "pulseaudio",
            "binary_version": "1:8.0-0ubuntu3.15"
          },
          {
            "binary_name": "pulseaudio-esound-compat",
            "binary_version": "1:8.0-0ubuntu3.15"
          },
          {
            "binary_name": "pulseaudio-module-bluetooth",
            "binary_version": "1:8.0-0ubuntu3.15"
          },
          {
            "binary_name": "pulseaudio-module-droid",
            "binary_version": "1:8.0-0ubuntu3.15"
          },
          {
            "binary_name": "pulseaudio-module-gconf",
            "binary_version": "1:8.0-0ubuntu3.15"
          },
          {
            "binary_name": "pulseaudio-module-jack",
            "binary_version": "1:8.0-0ubuntu3.15"
          },
          {
            "binary_name": "pulseaudio-module-lirc",
            "binary_version": "1:8.0-0ubuntu3.15"
          },
          {
            "binary_name": "pulseaudio-module-raop",
            "binary_version": "1:8.0-0ubuntu3.15"
          },
          {
            "binary_name": "pulseaudio-module-trust-store",
            "binary_version": "1:8.0-0ubuntu3.15"
          },
          {
            "binary_name": "pulseaudio-module-x11",
            "binary_version": "1:8.0-0ubuntu3.15"
          },
          {
            "binary_name": "pulseaudio-module-zeroconf",
            "binary_version": "1:8.0-0ubuntu3.15"
          },
          {
            "binary_name": "pulseaudio-utils",
            "binary_version": "1:8.0-0ubuntu3.15"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "pulseaudio",
        "purl": "pkg:deb/ubuntu/pulseaudio@1:8.0-0ubuntu3.15?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:8.0-0ubuntu3.15"
            }
          ],
          "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",
        "1:8.0-0ubuntu3.12",
        "1:8.0-0ubuntu3.14"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libpulse-mainloop-glib0",
            "binary_version": "1:11.1-1ubuntu7.11"
          },
          {
            "binary_name": "libpulse0",
            "binary_version": "1:11.1-1ubuntu7.11"
          },
          {
            "binary_name": "libpulsedsp",
            "binary_version": "1:11.1-1ubuntu7.11"
          },
          {
            "binary_name": "pulseaudio",
            "binary_version": "1:11.1-1ubuntu7.11"
          },
          {
            "binary_name": "pulseaudio-equalizer",
            "binary_version": "1:11.1-1ubuntu7.11"
          },
          {
            "binary_name": "pulseaudio-esound-compat",
            "binary_version": "1:11.1-1ubuntu7.11"
          },
          {
            "binary_name": "pulseaudio-module-bluetooth",
            "binary_version": "1:11.1-1ubuntu7.11"
          },
          {
            "binary_name": "pulseaudio-module-gconf",
            "binary_version": "1:11.1-1ubuntu7.11"
          },
          {
            "binary_name": "pulseaudio-module-jack",
            "binary_version": "1:11.1-1ubuntu7.11"
          },
          {
            "binary_name": "pulseaudio-module-lirc",
            "binary_version": "1:11.1-1ubuntu7.11"
          },
          {
            "binary_name": "pulseaudio-module-raop",
            "binary_version": "1:11.1-1ubuntu7.11"
          },
          {
            "binary_name": "pulseaudio-module-zeroconf",
            "binary_version": "1:11.1-1ubuntu7.11"
          },
          {
            "binary_name": "pulseaudio-utils",
            "binary_version": "1:11.1-1ubuntu7.11"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "pulseaudio",
        "purl": "pkg:deb/ubuntu/pulseaudio@1:11.1-1ubuntu7.11?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:11.1-1ubuntu7.11"
            }
          ],
          "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",
        "1:11.1-1ubuntu7.7",
        "1:11.1-1ubuntu7.8",
        "1:11.1-1ubuntu7.9",
        "1:11.1-1ubuntu7.10"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libpulse-mainloop-glib0",
            "binary_version": "1:13.99.1-1ubuntu3.8"
          },
          {
            "binary_name": "libpulse0",
            "binary_version": "1:13.99.1-1ubuntu3.8"
          },
          {
            "binary_name": "libpulsedsp",
            "binary_version": "1:13.99.1-1ubuntu3.8"
          },
          {
            "binary_name": "pulseaudio",
            "binary_version": "1:13.99.1-1ubuntu3.8"
          },
          {
            "binary_name": "pulseaudio-equalizer",
            "binary_version": "1:13.99.1-1ubuntu3.8"
          },
          {
            "binary_name": "pulseaudio-module-bluetooth",
            "binary_version": "1:13.99.1-1ubuntu3.8"
          },
          {
            "binary_name": "pulseaudio-module-gsettings",
            "binary_version": "1:13.99.1-1ubuntu3.8"
          },
          {
            "binary_name": "pulseaudio-module-jack",
            "binary_version": "1:13.99.1-1ubuntu3.8"
          },
          {
            "binary_name": "pulseaudio-module-lirc",
            "binary_version": "1:13.99.1-1ubuntu3.8"
          },
          {
            "binary_name": "pulseaudio-module-raop",
            "binary_version": "1:13.99.1-1ubuntu3.8"
          },
          {
            "binary_name": "pulseaudio-module-zeroconf",
            "binary_version": "1:13.99.1-1ubuntu3.8"
          },
          {
            "binary_name": "pulseaudio-utils",
            "binary_version": "1:13.99.1-1ubuntu3.8"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "pulseaudio",
        "purl": "pkg:deb/ubuntu/pulseaudio@1:13.99.1-1ubuntu3.8?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:13.99.1-1ubuntu3.8"
            }
          ],
          "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",
        "1:13.99.1-1ubuntu3.2",
        "1:13.99.1-1ubuntu3.3",
        "1:13.99.1-1ubuntu3.4",
        "1:13.99.1-1ubuntu3.5",
        "1:13.99.1-1ubuntu3.6",
        "1:13.99.1-1ubuntu3.7"
      ]
    }
  ],
  "aliases": [],
  "details": "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.",
  "id": "UBUNTU-CVE-2020-16123",
  "modified": "2026-04-22T07:39:29Z",
  "published": "2020-11-23T17:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-16123"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4640-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-16123"
    }
  ],
  "related": [
    "USN-4640-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2020-16123"
  ]
}



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.