pysec-2021-63
Vulnerability from pysec
Published
2021-02-07 20:15
Modified
2021-02-19 17:23
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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