USN-3158-1 (UBUNTU-CVE-2016-2123)

Vulnerability from osv_ubuntu – Published: 2016-12-19 17:34 – Updated: 2026-04-22 07:36 – Source website
VLAI
Summary
samba vulnerabilities
Details

Frederic Besler and others discovered that the ndr_pull_dnsp_nam function in Samba contained an integer overflow. An authenticated attacker could use this to gain administrative privileges. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 16.10. (CVE-2016-2123)

Simo Sorce discovered that that Samba clients always requested a forwardable ticket when using Kerberos authentication. An attacker could use this to impersonate an authenticated user or service. (CVE-2016-2125)

Volker Lendecke discovered that Kerberos PAC validation implementation in Samba contained multiple vulnerabilities. An authenticated attacker could use this to cause a denial of service or gain administrative privileges. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 16.10. (CVE-2016-2126)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2016-2123",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2016-2125",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.0/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2016-2126",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:14.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libnss-winbind",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.4"
          },
          {
            "binary_name": "libpam-smbpass",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.4"
          },
          {
            "binary_name": "libpam-winbind",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.4"
          },
          {
            "binary_name": "libparse-pidl-perl",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.4"
          },
          {
            "binary_name": "libsmbclient",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.4"
          },
          {
            "binary_name": "libsmbsharemodes0",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.4"
          },
          {
            "binary_name": "libwbclient0",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.4"
          },
          {
            "binary_name": "python-samba",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.4"
          },
          {
            "binary_name": "registry-tools",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.4"
          },
          {
            "binary_name": "samba",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.4"
          },
          {
            "binary_name": "samba-common",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.4"
          },
          {
            "binary_name": "samba-common-bin",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.4"
          },
          {
            "binary_name": "samba-dsdb-modules",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.4"
          },
          {
            "binary_name": "samba-libs",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.4"
          },
          {
            "binary_name": "samba-testsuite",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.4"
          },
          {
            "binary_name": "samba-vfs-modules",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.4"
          },
          {
            "binary_name": "smbclient",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.4"
          },
          {
            "binary_name": "winbind",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "samba",
        "purl": "pkg:deb/ubuntu/samba@2:4.3.11+dfsg-0ubuntu0.14.04.4?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:4.3.11+dfsg-0ubuntu0.14.04.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:3.6.18-1ubuntu3",
        "2:4.0.10+dfsg-4ubuntu2",
        "2:4.0.13+dfsg-1ubuntu1",
        "2:4.1.3+dfsg-2ubuntu2",
        "2:4.1.3+dfsg-2ubuntu3",
        "2:4.1.3+dfsg-2ubuntu4",
        "2:4.1.3+dfsg-2ubuntu5",
        "2:4.1.6+dfsg-1ubuntu1",
        "2:4.1.6+dfsg-1ubuntu2",
        "2:4.1.6+dfsg-1ubuntu2.14.04.1",
        "2:4.1.6+dfsg-1ubuntu2.14.04.2",
        "2:4.1.6+dfsg-1ubuntu2.14.04.3",
        "2:4.1.6+dfsg-1ubuntu2.14.04.4",
        "2:4.1.6+dfsg-1ubuntu2.14.04.5",
        "2:4.1.6+dfsg-1ubuntu2.14.04.7",
        "2:4.1.6+dfsg-1ubuntu2.14.04.8",
        "2:4.1.6+dfsg-1ubuntu2.14.04.9",
        "2:4.1.6+dfsg-1ubuntu2.14.04.11",
        "2:4.1.6+dfsg-1ubuntu2.14.04.12",
        "2:4.1.6+dfsg-1ubuntu2.14.04.13",
        "2:4.3.8+dfsg-0ubuntu0.14.04.2",
        "2:4.3.9+dfsg-0ubuntu0.14.04.1",
        "2:4.3.9+dfsg-0ubuntu0.14.04.3",
        "2:4.3.11+dfsg-0ubuntu0.14.04.1",
        "2:4.3.11+dfsg-0ubuntu0.14.04.2",
        "2:4.3.11+dfsg-0ubuntu0.14.04.3"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2016-2123",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2016-2125",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.0/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2016-2126",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:16.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "ctdb",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.3"
          },
          {
            "binary_name": "libnss-winbind",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.3"
          },
          {
            "binary_name": "libpam-winbind",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.3"
          },
          {
            "binary_name": "libparse-pidl-perl",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.3"
          },
          {
            "binary_name": "libsmbclient",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.3"
          },
          {
            "binary_name": "libwbclient0",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.3"
          },
          {
            "binary_name": "python-samba",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.3"
          },
          {
            "binary_name": "registry-tools",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.3"
          },
          {
            "binary_name": "samba",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.3"
          },
          {
            "binary_name": "samba-common",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.3"
          },
          {
            "binary_name": "samba-common-bin",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.3"
          },
          {
            "binary_name": "samba-dsdb-modules",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.3"
          },
          {
            "binary_name": "samba-libs",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.3"
          },
          {
            "binary_name": "samba-testsuite",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.3"
          },
          {
            "binary_name": "samba-vfs-modules",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.3"
          },
          {
            "binary_name": "smbclient",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.3"
          },
          {
            "binary_name": "winbind",
            "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "samba",
        "purl": "pkg:deb/ubuntu/samba@2:4.3.11+dfsg-0ubuntu0.16.04.3?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:4.3.11+dfsg-0ubuntu0.16.04.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:4.1.17+dfsg-4ubuntu2",
        "2:4.1.20+dfsg-1ubuntu1",
        "2:4.1.20+dfsg-1ubuntu2",
        "2:4.1.20+dfsg-1ubuntu3",
        "2:4.1.20+dfsg-1ubuntu5",
        "2:4.3.3+dfsg-1ubuntu1",
        "2:4.3.3+dfsg-1ubuntu2",
        "2:4.3.3+dfsg-1ubuntu3",
        "2:4.3.6+dfsg-1ubuntu1",
        "2:4.3.8+dfsg-0ubuntu1",
        "2:4.3.9+dfsg-0ubuntu0.16.04.1",
        "2:4.3.9+dfsg-0ubuntu0.16.04.2",
        "2:4.3.9+dfsg-0ubuntu0.16.04.3",
        "2:4.3.11+dfsg-0ubuntu0.16.04.1"
      ]
    }
  ],
  "aliases": [],
  "details": "Frederic Besler and others discovered that the ndr_pull_dnsp_nam\nfunction in Samba contained an integer overflow. An authenticated\nattacker could use this to gain administrative privileges. This issue\nonly affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 16.10.\n(CVE-2016-2123)\n\nSimo Sorce discovered that that Samba clients always requested\na forwardable ticket when using Kerberos authentication. An\nattacker could use this to impersonate an authenticated user or\nservice. (CVE-2016-2125)\n\nVolker Lendecke discovered that Kerberos PAC validation implementation\nin Samba contained multiple vulnerabilities. An authenticated attacker\ncould use this to cause a denial of service or gain administrative\nprivileges. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04\nLTS, and Ubuntu 16.10. (CVE-2016-2126)\n",
  "id": "USN-3158-1",
  "modified": "2026-04-22T07:36:33Z",
  "published": "2016-12-19T17:34:58Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-3158-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2016-2123"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2016-2125"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2016-2126"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "samba vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2016-2123",
    "UBUNTU-CVE-2016-2125",
    "UBUNTU-CVE-2016-2126"
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.