pysec - pysec-2021-63

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

JSON

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"
    }
  ]
}

CVE-2020-36242 (GCVE-0-2020-36242)

Vulnerability from cvelistv5

Published

2021-02-07 19:50

Modified

2024-08-04 17:23

Severity ?

CWE

Summary

References

URL

Tags

	https://github.com/pyca/cryptography/issues/5615	x_refsource_MISC
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7RGQLK4J5ZQFRLKCHVVG6BKZTUQMG7E/	vendor-advisory, x_refsource_FEDORA
	https://www.oracle.com/security-alerts/cpuapr2022.html	x_refsource_MISC
	https://github.com/pyca/cryptography/compare/3.3.1...3.3.2	x_refsource_CONFIRM
	https://github.com/pyca/cryptography/blob/master/CHANGELOG.rst	x_refsource_CONFIRM
	https://www.oracle.com/security-alerts/cpujul2022.html	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	n/a	n/a	Version: n/a

Show details on NVD website

JSON

To clipboard

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ghsa-rhm9-p9w5-fwm7

Vulnerability from github

Published

2021-02-10 01:32

Modified

2024-09-13 18:33

Severity ?

9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
8.8 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N

Summary

PyCA Cryptography symmetrically encrypting large values can lead to integer overflow

Details

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. When certain sequences of update() calls with large values (multiple GBs) for symetric encryption or decryption occur, it's possible for an integer overflow to happen, leading to mishandling of buffers. This is patched in version 3.3.2 and newer.

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "cryptography"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.1"
            },
            {
              "fixed": "3.3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2020-36242"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-190",
      "CWE-787"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-02-10T01:31:02Z",
    "nvd_published_at": "2021-02-07T20:15:00Z",
    "severity": "HIGH"
  },
  "details": "cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. When certain sequences of `update()` calls with large values (multiple GBs) for symetric encryption or decryption occur, it\u0027s possible for an integer overflow to happen, leading to mishandling of buffers. This is patched in version 3.3.2 and newer.\n",
  "id": "GHSA-rhm9-p9w5-fwm7",
  "modified": "2024-09-13T18:33:13Z",
  "published": "2021-02-10T01:32:27Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/pyca/cryptography/security/advisories/GHSA-rhm9-p9w5-fwm7"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-36242"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pyca/cryptography/issues/5615"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pyca/cryptography/commit/82b6ce28389f0a317bc55ba2091a74b346db7cae"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-rhm9-p9w5-fwm7"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/pyca/cryptography"
    },
    {
      "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://github.com/pypa/advisory-database/tree/main/vulns/cryptography/PYSEC-2021-63.yaml"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7RGQLK4J5ZQFRLKCHVVG6BKZTUQMG7E"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L7RGQLK4J5ZQFRLKCHVVG6BKZTUQMG7E"
    },
    {
      "type": "WEB",
      "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
    },
    {
      "type": "WEB",
      "url": "https://www.oracle.com/security-alerts/cpujul2022.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "PyCA Cryptography symmetrically encrypting large values can lead to integer overflow"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

Action not permitted

pysec-2021-63

Vulnerability from pysec

CVE-2020-36242 (GCVE-0-2020-36242)

Vulnerability from cvelistv5

ghsa-rhm9-p9w5-fwm7

Vulnerability from github

Tags

Sightings

Nomenclature