Python-cryptography: bleichenbacher timing oracle attack against rsa decryption - incomplete fix for cve-2020-25659

{
  "id": "5fa4b43905d7ef79eaaf897a7bcfb10d3e811444bb6ae2234b36176632c5fde9",
  "url": "https://osv.dev/vulnerability/CVE-2023-50782",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Python-cryptography: bleichenbacher timing oracle attack against rsa decryption - incomplete fix for cve-2020-25659",
    "summary": "A flaw was found in the python-cryptography package. This issue may allow a remote attacker to decrypt captured messages in TLS servers that use RSA key exchanges, which may lead to exposure of confidential or sensitive data.",
    "evidence": "osv:CVE-2023-50782",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2023-50782",
      "aliases": [
        "CVE-2023-50782",
        "GHSA-3ww4-gg4f-jr7f",
        "PYSEC-2026-1283"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/pyca/cryptography",
              "type": "GIT",
              "events": [
                {
                  "introduced": "c9e65222c91df8b6f61650a3460e30232962c1e0"
                },
                {
                  "fixed": "4e64baf360a3a89bd92582f59344c12b5c0bd3fd"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "3.2"
                      },
                      {
                        "fixed": "42.0.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "cpe": "cpe:2.3:a:cryptography.io:cryptography:*:*:*:*:*:python:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "42.0.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "41.0.0",
            "40.0.0",
            "39.0.0",
            "38.0.0",
            "37.0.0",
            "36.0.0",
            "35.0.0",
            "3.4",
            "3.3",
            "3.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-50782.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.147392590Z",
      "provider": "osv",
      "references": [
        "https://access.redhat.com/downloads/content/package-browser/",
        "https://www.couchbase.com/alerts/",
        "https://access.redhat.com/security/cve/CVE-2023-50782",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/50xxx/CVE-2023-50782.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-50782",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2254432",
        "https://github.com/pyca/cryptography"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-203"
        ],
        "cna_assigner": "redhat",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/50xxx/CVE-2023-50782.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-50782",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504465,
  "published_at": "2024-02-05T20:45:49.705+00:00"
}