UBUNTU-CVE-2018-14647 (CVE-2018-14647)

Vulnerability from osv_ubuntu – Published: 2018-09-24 00:00 – Updated: 2026-04-22 07:38 – Source website
VLAI
Details

Python's elementtree C accelerator failed to initialise Expat's hash salt during initialization. This could make it easy to conduct denial of service attacks against Expat by constructing an XML document that would cause pathological hash collisions in Expat's internal data structures, consuming large amounts CPU and RAM. The vulnerability exists in Python versions 3.7.0, 3.6.0 through 3.6.6, 3.5.0 through 3.5.6, 3.4.0 through 3.4.9, 2.7.0 through 2.7.15.

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

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "idle-python2.7",
            "binary_version": "2.7.6-8ubuntu0.5"
          },
          {
            "binary_name": "libpython2.7",
            "binary_version": "2.7.6-8ubuntu0.5"
          },
          {
            "binary_name": "libpython2.7-minimal",
            "binary_version": "2.7.6-8ubuntu0.5"
          },
          {
            "binary_name": "libpython2.7-stdlib",
            "binary_version": "2.7.6-8ubuntu0.5"
          },
          {
            "binary_name": "libpython2.7-testsuite",
            "binary_version": "2.7.6-8ubuntu0.5"
          },
          {
            "binary_name": "python2.7",
            "binary_version": "2.7.6-8ubuntu0.5"
          },
          {
            "binary_name": "python2.7-examples",
            "binary_version": "2.7.6-8ubuntu0.5"
          },
          {
            "binary_name": "python2.7-minimal",
            "binary_version": "2.7.6-8ubuntu0.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "python2.7",
        "purl": "pkg:deb/ubuntu/python2.7@2.7.6-8ubuntu0.5?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.7.6-8ubuntu0.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.7.5-8ubuntu3",
        "2.7.5-8ubuntu4",
        "2.7.6-2",
        "2.7.6-2ubuntu1",
        "2.7.6-3",
        "2.7.6-3ubuntu1",
        "2.7.6-4",
        "2.7.6-4ubuntu1",
        "2.7.6-5",
        "2.7.6-7",
        "2.7.6-8",
        "2.7.6-8ubuntu0.2",
        "2.7.6-8ubuntu0.3",
        "2.7.6-8ubuntu0.4"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "idle-python3.4",
            "binary_version": "3.4.3-1ubuntu1~14.04.7"
          },
          {
            "binary_name": "libpython3.4",
            "binary_version": "3.4.3-1ubuntu1~14.04.7"
          },
          {
            "binary_name": "libpython3.4-minimal",
            "binary_version": "3.4.3-1ubuntu1~14.04.7"
          },
          {
            "binary_name": "libpython3.4-stdlib",
            "binary_version": "3.4.3-1ubuntu1~14.04.7"
          },
          {
            "binary_name": "libpython3.4-testsuite",
            "binary_version": "3.4.3-1ubuntu1~14.04.7"
          },
          {
            "binary_name": "python3.4",
            "binary_version": "3.4.3-1ubuntu1~14.04.7"
          },
          {
            "binary_name": "python3.4-examples",
            "binary_version": "3.4.3-1ubuntu1~14.04.7"
          },
          {
            "binary_name": "python3.4-minimal",
            "binary_version": "3.4.3-1ubuntu1~14.04.7"
          },
          {
            "binary_name": "python3.4-venv",
            "binary_version": "3.4.3-1ubuntu1~14.04.7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "python3.4",
        "purl": "pkg:deb/ubuntu/python3.4@3.4.3-1ubuntu1~14.04.7?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.4.3-1ubuntu1~14.04.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.4~b1-0ubuntu3",
        "3.4~b1-4ubuntu4",
        "3.4~b1-4ubuntu6",
        "3.4~b1-5ubuntu2",
        "3.4~b2-1",
        "3.4~b3-1ubuntu1",
        "3.4~rc1-1build1",
        "3.4~rc2-1",
        "3.4~rc3-0ubuntu1",
        "3.4.0-1",
        "3.4.0-2ubuntu1",
        "3.4.0-2ubuntu1.1",
        "3.4.3-1ubuntu1~14.04.1",
        "3.4.3-1ubuntu1~14.04.3",
        "3.4.3-1ubuntu1~14.04.4",
        "3.4.3-1ubuntu1~14.04.5",
        "3.4.3-1ubuntu1~14.04.6"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "idle-python3.5",
            "binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1+esm1"
          },
          {
            "binary_name": "libpython3.5",
            "binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1+esm1"
          },
          {
            "binary_name": "libpython3.5-minimal",
            "binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1+esm1"
          },
          {
            "binary_name": "libpython3.5-stdlib",
            "binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1+esm1"
          },
          {
            "binary_name": "libpython3.5-testsuite",
            "binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1+esm1"
          },
          {
            "binary_name": "python3.5",
            "binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1+esm1"
          },
          {
            "binary_name": "python3.5-examples",
            "binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1+esm1"
          },
          {
            "binary_name": "python3.5-minimal",
            "binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1+esm1"
          },
          {
            "binary_name": "python3.5-venv",
            "binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "python3.5",
        "purl": "pkg:deb/ubuntu/python3.5@3.5.2-2ubuntu0~16.04.4~14.04.1+esm1?arch=source\u0026distro=trusty/esm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.5.2-2ubuntu0~16.04.4~14.04.1+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.5.2-2ubuntu0~16.04.4~14.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "idle-python2.7",
            "binary_version": "2.7.12-1ubuntu0~16.04.4"
          },
          {
            "binary_name": "libpython2.7",
            "binary_version": "2.7.12-1ubuntu0~16.04.4"
          },
          {
            "binary_name": "libpython2.7-minimal",
            "binary_version": "2.7.12-1ubuntu0~16.04.4"
          },
          {
            "binary_name": "libpython2.7-stdlib",
            "binary_version": "2.7.12-1ubuntu0~16.04.4"
          },
          {
            "binary_name": "libpython2.7-testsuite",
            "binary_version": "2.7.12-1ubuntu0~16.04.4"
          },
          {
            "binary_name": "python2.7",
            "binary_version": "2.7.12-1ubuntu0~16.04.4"
          },
          {
            "binary_name": "python2.7-examples",
            "binary_version": "2.7.12-1ubuntu0~16.04.4"
          },
          {
            "binary_name": "python2.7-minimal",
            "binary_version": "2.7.12-1ubuntu0~16.04.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "python2.7",
        "purl": "pkg:deb/ubuntu/python2.7@2.7.12-1ubuntu0~16.04.4?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.7.12-1ubuntu0~16.04.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.7.10-4ubuntu1",
        "2.7.10-4ubuntu2",
        "2.7.11-2",
        "2.7.11-3",
        "2.7.11-4",
        "2.7.11-6",
        "2.7.11-7",
        "2.7.11-7ubuntu1",
        "2.7.12-1~16.04",
        "2.7.12-1ubuntu0~16.04.1",
        "2.7.12-1ubuntu0~16.04.2",
        "2.7.12-1ubuntu0~16.04.3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "idle-python3.5",
            "binary_version": "3.5.2-2ubuntu0~16.04.5"
          },
          {
            "binary_name": "libpython3.5",
            "binary_version": "3.5.2-2ubuntu0~16.04.5"
          },
          {
            "binary_name": "libpython3.5-minimal",
            "binary_version": "3.5.2-2ubuntu0~16.04.5"
          },
          {
            "binary_name": "libpython3.5-stdlib",
            "binary_version": "3.5.2-2ubuntu0~16.04.5"
          },
          {
            "binary_name": "libpython3.5-testsuite",
            "binary_version": "3.5.2-2ubuntu0~16.04.5"
          },
          {
            "binary_name": "python3.5",
            "binary_version": "3.5.2-2ubuntu0~16.04.5"
          },
          {
            "binary_name": "python3.5-examples",
            "binary_version": "3.5.2-2ubuntu0~16.04.5"
          },
          {
            "binary_name": "python3.5-minimal",
            "binary_version": "3.5.2-2ubuntu0~16.04.5"
          },
          {
            "binary_name": "python3.5-venv",
            "binary_version": "3.5.2-2ubuntu0~16.04.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "python3.5",
        "purl": "pkg:deb/ubuntu/python3.5@3.5.2-2ubuntu0~16.04.5?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.5.2-2ubuntu0~16.04.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.5.0-3",
        "3.5.0-3ubuntu1",
        "3.5.1~rc1-2ubuntu1",
        "3.5.1-1",
        "3.5.1-2",
        "3.5.1-3",
        "3.5.1-5",
        "3.5.1-6ubuntu1",
        "3.5.1-6ubuntu2",
        "3.5.1-9ubuntu1",
        "3.5.1-10",
        "3.5.2-2~16.01",
        "3.5.2-2~16.04",
        "3.5.2-2ubuntu0~16.04.1",
        "3.5.2-2ubuntu0~16.04.2",
        "3.5.2-2ubuntu0~16.04.3",
        "3.5.2-2ubuntu0~16.04.4"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "idle-python2.7",
            "binary_version": "2.7.15~rc1-1ubuntu0.1"
          },
          {
            "binary_name": "libpython2.7",
            "binary_version": "2.7.15~rc1-1ubuntu0.1"
          },
          {
            "binary_name": "libpython2.7-minimal",
            "binary_version": "2.7.15~rc1-1ubuntu0.1"
          },
          {
            "binary_name": "libpython2.7-stdlib",
            "binary_version": "2.7.15~rc1-1ubuntu0.1"
          },
          {
            "binary_name": "libpython2.7-testsuite",
            "binary_version": "2.7.15~rc1-1ubuntu0.1"
          },
          {
            "binary_name": "python2.7",
            "binary_version": "2.7.15~rc1-1ubuntu0.1"
          },
          {
            "binary_name": "python2.7-examples",
            "binary_version": "2.7.15~rc1-1ubuntu0.1"
          },
          {
            "binary_name": "python2.7-minimal",
            "binary_version": "2.7.15~rc1-1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "python2.7",
        "purl": "pkg:deb/ubuntu/python2.7@2.7.15~rc1-1ubuntu0.1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.7.15~rc1-1ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.7.14-2ubuntu2",
        "2.7.14-4",
        "2.7.14-6",
        "2.7.14-7",
        "2.7.14-8",
        "2.7.15~rc1-1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "idle-python3.6",
            "binary_version": "3.6.7-1~18.04"
          },
          {
            "binary_name": "libpython3.6",
            "binary_version": "3.6.7-1~18.04"
          },
          {
            "binary_name": "libpython3.6-minimal",
            "binary_version": "3.6.7-1~18.04"
          },
          {
            "binary_name": "libpython3.6-stdlib",
            "binary_version": "3.6.7-1~18.04"
          },
          {
            "binary_name": "libpython3.6-testsuite",
            "binary_version": "3.6.7-1~18.04"
          },
          {
            "binary_name": "python3.6",
            "binary_version": "3.6.7-1~18.04"
          },
          {
            "binary_name": "python3.6-examples",
            "binary_version": "3.6.7-1~18.04"
          },
          {
            "binary_name": "python3.6-minimal",
            "binary_version": "3.6.7-1~18.04"
          },
          {
            "binary_name": "python3.6-venv",
            "binary_version": "3.6.7-1~18.04"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "python3.6",
        "purl": "pkg:deb/ubuntu/python3.6@3.6.7-1~18.04?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.6.7-1~18.04"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.6.3-1ubuntu1",
        "3.6.4~rc1-1",
        "3.6.4~rc1-2",
        "3.6.4-1",
        "3.6.4-2",
        "3.6.4-3build1",
        "3.6.4-4",
        "3.6.5~rc1-1",
        "3.6.5-3",
        "3.6.6-1~18.04"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "idle-python3.7",
            "binary_version": "3.7.1-1~18.04"
          },
          {
            "binary_name": "libpython3.7",
            "binary_version": "3.7.1-1~18.04"
          },
          {
            "binary_name": "libpython3.7-minimal",
            "binary_version": "3.7.1-1~18.04"
          },
          {
            "binary_name": "libpython3.7-stdlib",
            "binary_version": "3.7.1-1~18.04"
          },
          {
            "binary_name": "libpython3.7-testsuite",
            "binary_version": "3.7.1-1~18.04"
          },
          {
            "binary_name": "python3.7",
            "binary_version": "3.7.1-1~18.04"
          },
          {
            "binary_name": "python3.7-examples",
            "binary_version": "3.7.1-1~18.04"
          },
          {
            "binary_name": "python3.7-minimal",
            "binary_version": "3.7.1-1~18.04"
          },
          {
            "binary_name": "python3.7-venv",
            "binary_version": "3.7.1-1~18.04"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "python3.7",
        "purl": "pkg:deb/ubuntu/python3.7@3.7.1-1~18.04?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.7.1-1~18.04"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.7.0~a2-1",
        "3.7.0~a3-1",
        "3.7.0~a3-2",
        "3.7.0~a3-3",
        "3.7.0~a4-1",
        "3.7.0~b1-1",
        "3.7.0~b1-1build1",
        "3.7.0~b2-1",
        "3.7.0~b3-1",
        "3.7.0-1~18.04"
      ]
    }
  ],
  "aliases": [],
  "details": "Python\u0027s elementtree C accelerator failed to initialise Expat\u0027s hash salt during initialization. This could make it easy to conduct denial of service attacks against Expat by constructing an XML document that would cause pathological hash collisions in Expat\u0027s internal data structures, consuming large amounts CPU and RAM. The vulnerability exists in Python versions 3.7.0, 3.6.0 through 3.6.6, 3.5.0 through 3.5.6, 3.4.0 through 3.4.9, 2.7.0 through 2.7.15.",
  "id": "UBUNTU-CVE-2018-14647",
  "modified": "2026-04-22T07:38:42Z",
  "published": "2018-09-24T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2018-14647"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-3817-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-3817-2"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2018-14647"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6891-1"
    }
  ],
  "related": [
    "USN-3817-1",
    "USN-3817-2",
    "USN-6891-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2018-14647"
  ]
}



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.