PYSEC-2021-63

Vulnerability from pysec - Published: 2021-02-07 20:15 - Updated: 2021-02-19 17:23
VLAI
Details

In the cryptography package before 3.3.2 for Python, certain sequences of update calls to symmetrically encrypt multi-GB values could result in an integer overflow and buffer overflow, as demonstrated by the Fernet class.

Impacted products
Name purl
cryptography pkg:pypi/cryptography
Aliases
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "cryptography",
        "purl": "pkg:pypi/cryptography"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.1"
            },
            {
              "fixed": "3.3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1",
        "3.1.1",
        "3.2",
        "3.2.1",
        "3.3",
        "3.3.1"
      ]
    }
  ],
  "aliases": [
    "CVE-2020-36242",
    "GHSA-rhm9-p9w5-fwm7"
  ],
  "details": "In the cryptography package before 3.3.2 for Python, certain sequences of update calls to symmetrically encrypt multi-GB values could result in an integer overflow and buffer overflow, as demonstrated by the Fernet class.",
  "id": "PYSEC-2021-63",
  "modified": "2021-02-19T17:23:00Z",
  "published": "2021-02-07T20:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://github.com/pyca/cryptography/issues/5615"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pyca/cryptography/blob/master/CHANGELOG.rst"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pyca/cryptography/compare/3.3.1...3.3.2"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L7RGQLK4J5ZQFRLKCHVVG6BKZTUQMG7E/"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-rhm9-p9w5-fwm7"
    }
  ]
}



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