ubuntu-cve-2019-15718
Vulnerability from osv_ubuntu
Published
2019-09-03 00:00
Modified
2026-04-22 07:39
Summary
Details

In systemd 240, bus_open_system_watch_bind_with_description in shared/bus-util.c (as used by systemd-resolved to connect to the system D-Bus instance), calls sd_bus_set_trusted, which disables access controls for incoming D-Bus messages. An unprivileged user can exploit this by executing D-Bus methods that should be restricted to privileged users, in order to change the system's DNS resolver settings.

Severity
4.4 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
5.5 (Medium)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libnss-myhostname",
            "binary_version": "237-3ubuntu10.28"
          },
          {
            "binary_name": "libnss-mymachines",
            "binary_version": "237-3ubuntu10.28"
          },
          {
            "binary_name": "libnss-resolve",
            "binary_version": "237-3ubuntu10.28"
          },
          {
            "binary_name": "libnss-systemd",
            "binary_version": "237-3ubuntu10.28"
          },
          {
            "binary_name": "libpam-systemd",
            "binary_version": "237-3ubuntu10.28"
          },
          {
            "binary_name": "libsystemd0",
            "binary_version": "237-3ubuntu10.28"
          },
          {
            "binary_name": "libudev1",
            "binary_version": "237-3ubuntu10.28"
          },
          {
            "binary_name": "systemd",
            "binary_version": "237-3ubuntu10.28"
          },
          {
            "binary_name": "systemd-container",
            "binary_version": "237-3ubuntu10.28"
          },
          {
            "binary_name": "systemd-coredump",
            "binary_version": "237-3ubuntu10.28"
          },
          {
            "binary_name": "systemd-journal-remote",
            "binary_version": "237-3ubuntu10.28"
          },
          {
            "binary_name": "systemd-sysv",
            "binary_version": "237-3ubuntu10.28"
          },
          {
            "binary_name": "systemd-tests",
            "binary_version": "237-3ubuntu10.28"
          },
          {
            "binary_name": "udev",
            "binary_version": "237-3ubuntu10.28"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "systemd",
        "purl": "pkg:deb/ubuntu/systemd@237-3ubuntu10.28?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "237-3ubuntu10.28"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "234-2ubuntu12",
        "235-2ubuntu3",
        "235-3ubuntu2",
        "235-3ubuntu3",
        "237-3ubuntu3",
        "237-3ubuntu4",
        "237-3ubuntu6",
        "237-3ubuntu7",
        "237-3ubuntu8",
        "237-3ubuntu10",
        "237-3ubuntu10.2",
        "237-3ubuntu10.3",
        "237-3ubuntu10.4",
        "237-3ubuntu10.6",
        "237-3ubuntu10.9",
        "237-3ubuntu10.11",
        "237-3ubuntu10.12",
        "237-3ubuntu10.13",
        "237-3ubuntu10.15",
        "237-3ubuntu10.17",
        "237-3ubuntu10.19",
        "237-3ubuntu10.20",
        "237-3ubuntu10.21",
        "237-3ubuntu10.22",
        "237-3ubuntu10.23",
        "237-3ubuntu10.24",
        "237-3ubuntu10.25",
        "237-3ubuntu10.26"
      ]
    }
  ],
  "aliases": [],
  "details": "In systemd 240, bus_open_system_watch_bind_with_description in shared/bus-util.c (as used by systemd-resolved to connect to the system D-Bus instance), calls sd_bus_set_trusted, which disables access controls for incoming D-Bus messages. An unprivileged user can exploit this by executing D-Bus methods that should be restricted to privileged users, in order to change the system\u0027s DNS resolver settings.",
  "id": "UBUNTU-CVE-2019-15718",
  "modified": "2026-04-22T07:39:05Z",
  "published": "2019-09-03T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-15718"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4120-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2019-15718"
    }
  ],
  "related": [
    "USN-4120-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2019-15718"
  ]
}



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