ubuntu-cve-2018-14345
Vulnerability from osv_ubuntu
Published
2018-07-17 14:29
Modified
2025-10-24 04:47
Summary
Details

An issue was discovered in SDDM through 0.17.0. If configured with ReuseSession=true, the password is not checked for users with an already existing session. Any user with access to the system D-Bus can therefore unlock any graphical session. This is related to daemon/Display.cpp and helper/backend/PamBackend.cpp.

Severity
7.5 (High)
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "sddm",
            "binary_version": "0.13.0-1ubuntu5"
          },
          {
            "binary_name": "sddm-theme-circles",
            "binary_version": "0.13.0-1ubuntu5"
          },
          {
            "binary_name": "sddm-theme-elarun",
            "binary_version": "0.13.0-1ubuntu5"
          },
          {
            "binary_name": "sddm-theme-maldives",
            "binary_version": "0.13.0-1ubuntu5"
          },
          {
            "binary_name": "sddm-theme-maui",
            "binary_version": "0.13.0-1ubuntu5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "sddm",
        "purl": "pkg:deb/ubuntu/sddm@0.13.0-1ubuntu5?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.11.0-0ubuntu11",
        "0.11.0-0ubuntu12",
        "0.13.0-1ubuntu1",
        "0.13.0-1ubuntu3",
        "0.13.0-1ubuntu4",
        "0.13.0-1ubuntu5"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "sddm",
            "binary_version": "0.17.0-1ubuntu7"
          },
          {
            "binary_name": "sddm-theme-debian-elarun",
            "binary_version": "0.17.0-1ubuntu7"
          },
          {
            "binary_name": "sddm-theme-debian-maui",
            "binary_version": "0.17.0-1ubuntu7"
          },
          {
            "binary_name": "sddm-theme-elarun",
            "binary_version": "0.17.0-1ubuntu7"
          },
          {
            "binary_name": "sddm-theme-maldives",
            "binary_version": "0.17.0-1ubuntu7"
          },
          {
            "binary_name": "sddm-theme-maui",
            "binary_version": "0.17.0-1ubuntu7"
          },
          {
            "binary_name": "sddm-theme-maya",
            "binary_version": "0.17.0-1ubuntu7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "sddm",
        "purl": "pkg:deb/ubuntu/sddm@0.17.0-1ubuntu7?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.14.0-4ubuntu1",
        "0.14.0-4ubuntu2",
        "0.17.0-1ubuntu1",
        "0.17.0-1ubuntu2",
        "0.17.0-1ubuntu3",
        "0.17.0-1ubuntu4",
        "0.17.0-1ubuntu5",
        "0.17.0-1ubuntu6",
        "0.17.0-1ubuntu7"
      ]
    }
  ],
  "aliases": [],
  "details": "An issue was discovered in SDDM through 0.17.0. If configured with ReuseSession=true, the password is not checked for users with an already existing session. Any user with access to the system D-Bus can therefore unlock any graphical session. This is related to daemon/Display.cpp and helper/backend/PamBackend.cpp.",
  "id": "UBUNTU-CVE-2018-14345",
  "modified": "2025-10-24T04:47:08Z",
  "published": "2018-07-17T14:29:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2018-14345"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.suse.com/show_bug.cgi?id=1101450"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/sddm/sddm/commit/147cec383892d143b5e02daa70f1e7def50f5d98"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2018-14345"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2018-14345"
  ]
}



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