ubuntu-cve-2018-20406
Vulnerability from osv_ubuntu
Published
2018-12-23 00:00
Modified
2026-04-22 07:38
Summary
Details

Modules/_pickle.c in Python before 3.7.1 has an integer overflow via a large LONG_BINPUT value that is mishandled during a "resize to twice the size" attempt. This issue might cause memory exhaustion, but is only relevant if the pickle format is used for serializing tens or hundreds of gigabytes of data. This issue is fixed in: v3.4.10, v3.4.10rc1; v3.5.10, v3.5.10rc1, v3.5.7, v3.5.7rc1, v3.5.8, v3.5.8rc1, v3.5.8rc2, v3.5.9; v3.6.10, v3.6.10rc1, v3.6.11, v3.6.11rc1, v3.6.12, v3.6.7, v3.6.7rc1, v3.6.7rc2, v3.6.8, v3.6.8rc1, v3.6.9, v3.6.9rc1; v3.7.1, v3.7.1rc1, v3.7.1rc2, v3.7.2, v3.7.2rc1, v3.7.3, v3.7.3rc1, v3.7.4, v3.7.4rc1, v3.7.4rc2, v3.7.5, v3.7.5rc1, v3.7.6, v3.7.6rc1, v3.7.7, v3.7.7rc1, v3.7.8, v3.7.8rc1, v3.7.9.

Severity
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)
low
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "idle-python3.4",
            "binary_version": "3.4.3-1ubuntu1~14.04.7+esm2"
          },
          {
            "binary_name": "libpython3.4",
            "binary_version": "3.4.3-1ubuntu1~14.04.7+esm2"
          },
          {
            "binary_name": "libpython3.4-minimal",
            "binary_version": "3.4.3-1ubuntu1~14.04.7+esm2"
          },
          {
            "binary_name": "libpython3.4-stdlib",
            "binary_version": "3.4.3-1ubuntu1~14.04.7+esm2"
          },
          {
            "binary_name": "libpython3.4-testsuite",
            "binary_version": "3.4.3-1ubuntu1~14.04.7+esm2"
          },
          {
            "binary_name": "python3.4",
            "binary_version": "3.4.3-1ubuntu1~14.04.7+esm2"
          },
          {
            "binary_name": "python3.4-examples",
            "binary_version": "3.4.3-1ubuntu1~14.04.7+esm2"
          },
          {
            "binary_name": "python3.4-minimal",
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          },
          {
            "binary_name": "python3.4-venv",
            "binary_version": "3.4.3-1ubuntu1~14.04.7+esm2"
          }
        ]
      },
      "package": {
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        "name": "python3.4",
        "purl": "pkg:deb/ubuntu/python3.4@3.4.3-1ubuntu1~14.04.7+esm2?arch=source\u0026distro=trusty/esm"
      },
      "ranges": [
        {
          "events": [
            {
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            },
            {
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            }
          ],
          "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",
        "3.4.3-1ubuntu1~14.04.7"
      ]
    },
    {
      "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-python3.5",
            "binary_version": "3.5.2-2ubuntu0~16.04.8"
          },
          {
            "binary_name": "libpython3.5",
            "binary_version": "3.5.2-2ubuntu0~16.04.8"
          },
          {
            "binary_name": "libpython3.5-minimal",
            "binary_version": "3.5.2-2ubuntu0~16.04.8"
          },
          {
            "binary_name": "libpython3.5-stdlib",
            "binary_version": "3.5.2-2ubuntu0~16.04.8"
          },
          {
            "binary_name": "libpython3.5-testsuite",
            "binary_version": "3.5.2-2ubuntu0~16.04.8"
          },
          {
            "binary_name": "python3.5",
            "binary_version": "3.5.2-2ubuntu0~16.04.8"
          },
          {
            "binary_name": "python3.5-examples",
            "binary_version": "3.5.2-2ubuntu0~16.04.8"
          },
          {
            "binary_name": "python3.5-minimal",
            "binary_version": "3.5.2-2ubuntu0~16.04.8"
          },
          {
            "binary_name": "python3.5-venv",
            "binary_version": "3.5.2-2ubuntu0~16.04.8"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "python3.5",
        "purl": "pkg:deb/ubuntu/python3.5@3.5.2-2ubuntu0~16.04.8?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.5.2-2ubuntu0~16.04.8"
            }
          ],
          "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",
        "3.5.2-2ubuntu0~16.04.5"
      ]
    },
    {
      "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"
      ]
    }
  ],
  "aliases": [],
  "details": "Modules/_pickle.c in Python before 3.7.1 has an integer overflow via a large LONG_BINPUT value that is mishandled during a \"resize to twice the size\" attempt. This issue might cause memory exhaustion, but is only relevant if the pickle format is used for serializing tens or hundreds of gigabytes of data. This issue is fixed in: v3.4.10, v3.4.10rc1; v3.5.10, v3.5.10rc1, v3.5.7, v3.5.7rc1, v3.5.8, v3.5.8rc1, v3.5.8rc2, v3.5.9; v3.6.10, v3.6.10rc1, v3.6.11, v3.6.11rc1, v3.6.12, v3.6.7, v3.6.7rc1, v3.6.7rc2, v3.6.8, v3.6.8rc1, v3.6.9, v3.6.9rc1; v3.7.1, v3.7.1rc1, v3.7.1rc2, v3.7.2, v3.7.2rc1, v3.7.3, v3.7.3rc1, v3.7.4, v3.7.4rc1, v3.7.4rc2, v3.7.5, v3.7.5rc1, v3.7.6, v3.7.6rc1, v3.7.7, v3.7.7rc1, v3.7.8, v3.7.8rc1, v3.7.9.",
  "id": "UBUNTU-CVE-2018-20406",
  "modified": "2026-04-22T07:38:46Z",
  "published": "2018-12-23T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2018-20406"
    },
    {
      "type": "REPORT",
      "url": "https://python-security.readthedocs.io/vuln/pickle-load-dos.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4127-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4127-2"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2018-20406"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6891-1"
    }
  ],
  "related": [
    "USN-4127-1",
    "USN-4127-2",
    "USN-6891-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "low",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2018-20406"
  ]
}



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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.


Detection rules are retrieved from Rulezet.