BREW-CRYPTOGRAPHY-CVE-20… (CVE-2023-49083)

Vulnerability from osv_homebrew – Published: 2026-08-13 16:41 – Updated: 2026-09-09 23:49 – Source website
VLAI
Summary
cryptography vulnerable to NULL-dereference when loading PKCS7 certificates
Details

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Calling load_pem_pkcs7_certificates or load_der_pkcs7_certificates could lead to a NULL-pointer dereference and segfault. Exploitation of this vulnerability poses a serious risk of Denial of Service (DoS) for any application attempting to deserialize a PKCS7 blob/certificate. The consequences extend to potential disruptions in system availability and stability. This vulnerability has been patched in version 41.0.6.

Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "upstream_fixed_in": "41.0.6"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "cryptography",
        "purl": "pkg:brew/cryptography"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "50.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "git",
    "upstream_evidence": [
      {
        "ecosystem": "GIT",
        "key": "https://github.com/pyca/cryptography",
        "name": "https://github.com/pyca/cryptography",
        "strategy": "git",
        "subject_version": "50.0.1"
      },
      {
        "ecosystem": "PyPI",
        "key": "pkg:pypi/cryptography@50.0.1",
        "name": "cryptography",
        "strategy": "registry",
        "subject_version": "50.0.1"
      }
    ]
  },
  "details": "cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Calling `load_pem_pkcs7_certificates` or `load_der_pkcs7_certificates` could lead to a NULL-pointer dereference and segfault. Exploitation of this vulnerability poses a serious risk of Denial of Service (DoS) for any application attempting to deserialize a PKCS7 blob/certificate. The consequences extend to potential disruptions in system availability and stability. This vulnerability has been patched in version 41.0.6.",
  "id": "BREW-cryptography-CVE-2023-49083",
  "modified": "2026-09-09T23:49:07Z",
  "published": "2026-08-13T16:41:16Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2024/10/msg00012.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QMNTYMUGFJSDBYBU22FUYBHFRZODRKXV/"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/49xxx/CVE-2023-49083.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/pyca/cryptography/security/advisories/GHSA-jfhm-5ghh-2f97"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-49083"
    },
    {
      "type": "FIX",
      "url": "https://github.com/pyca/cryptography/commit/f09c261ca10a31fe41b1262306db7f8f1da0e48a"
    },
    {
      "type": "FIX",
      "url": "https://github.com/pyca/cryptography/pull/9926"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "cryptography vulnerable to NULL-dereference when loading PKCS7 certificates",
  "upstream": [
    "CVE-2023-49083",
    "GHSA-jfhm-5ghh-2f97",
    "PYSEC-2023-254"
  ]
}



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