usn-4614-1
Vulnerability from osv_ubuntu
Published
2020-11-03 15:00
Modified
2026-04-27 14:11
Summary
gdm3 vulnerability
Details

Kevin Backhouse discovered that GDM incorrectly launched the initial setup tool when the accountsservice daemon was not reachable. A local attacker able to cause accountsservice to crash or stop responding could trick GDM into launching the initial setup tool and create a privileged user.

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2020-16125",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:P/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "gdm3",
            "binary_version": "3.28.3-0ubuntu18.04.6"
          },
          {
            "binary_name": "gir1.2-gdm-1.0",
            "binary_version": "3.28.3-0ubuntu18.04.6"
          },
          {
            "binary_name": "libgdm1",
            "binary_version": "3.28.3-0ubuntu18.04.6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "gdm3",
        "purl": "pkg:deb/ubuntu/gdm3@3.28.3-0ubuntu18.04.6?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.28.3-0ubuntu18.04.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.26.1-3ubuntu2",
        "3.26.1-3ubuntu3",
        "3.26.2.1-0ubuntu1",
        "3.26.2.1-2ubuntu1",
        "3.26.2.1-2ubuntu2",
        "3.27.90-0ubuntu1",
        "3.27.92-0ubuntu1",
        "3.28.0-0ubuntu1",
        "3.28.2-0ubuntu1.2",
        "3.28.2-0ubuntu1.3",
        "3.28.2-0ubuntu1.4",
        "3.28.3-0ubuntu18.04.1",
        "3.28.3-0ubuntu18.04.3",
        "3.28.3-0ubuntu18.04.4"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2020-16125",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:P/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "gdm3",
            "binary_version": "3.36.3-0ubuntu0.20.04.2"
          },
          {
            "binary_name": "gir1.2-gdm-1.0",
            "binary_version": "3.36.3-0ubuntu0.20.04.2"
          },
          {
            "binary_name": "libgdm1",
            "binary_version": "3.36.3-0ubuntu0.20.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "gdm3",
        "purl": "pkg:deb/ubuntu/gdm3@3.36.3-0ubuntu0.20.04.2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.36.3-0ubuntu0.20.04.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.34.1-1ubuntu1",
        "3.36.3-0ubuntu0.20.04.1"
      ]
    }
  ],
  "aliases": [],
  "details": "Kevin Backhouse discovered that GDM incorrectly launched the initial setup\ntool when the accountsservice daemon was not reachable. A local attacker\nable to cause accountsservice to crash or stop responding could trick GDM\ninto launching the initial setup tool and create a privileged user.\n",
  "id": "USN-4614-1",
  "modified": "2026-04-27T14:11:26Z",
  "published": "2020-11-03T15:00:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4614-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-16125"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "gdm3 vulnerability",
  "upstream": [
    "UBUNTU-CVE-2020-16125"
  ]
}



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