Fix CVE(s): CVE-2023-50782

{
  "id": "fb78d162e088a0143254976b315872f349a8a8c6f8c8232a5895cc2beb8e5987",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1788167137",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Fix CVE(s): CVE-2023-50782",
    "summary": "* SECURITY UPDATE: Bleichenbacher/Marvin timing oracle in RSA PKCS#1 v1.5 decryption. Distinguishing a padding failure from a successful decryption, by error or by plaintext length, lets an attacker with chosen ciphertexts recover the plaintext of an intercepted message. This is the incomplete-fix follow-up to CVE-2020-25659. - debian/patches/CVE-2023-50782.patch: expose Cryptography_HAS_IMPLICIT_RSA_REJECTION from the linked OpenSSL headers in src/_cffi_src/openssl/rsa.py, and skip the PKCS1v15 padding-error assertion when that OpenSSL implicitly rejects invalid padding, in tests/hazmat/primitives/test_rsa.py. - The behaviour that closes the oracle comes from OpenSSL implicit rejection (LP: #2054090); built against an OpenSSL without it the constant compiles as 0 and this package behaves as before. - CVE-2023-50782 * Build fix: call email.utils.parseaddr with strict=False in src/cryptography/x509/general_name.py. The ELS python2.7 and python3.6 carry CVE-2023-27043.patch, whose strict parser guards on isinstance(addr, str); on Python 2 that is bytes, so every unicode argument yields ('', '') and RFC822Name rejects valid addresses, which breaks collection of the package test suite. - debian/patches/fix-parseaddr-call.patch: same workaround the centos7els branch of this package already carries.",
    "evidence": "osv:CLSA-2026-1788167137",
    "products": [
      {
        "name": {
          "value": "python-cryptography",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.1.4-1ubuntu1.4+tuxcare.els1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "python-cryptography-doc",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.1.4-1ubuntu1.4+tuxcare.els1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "python3-cryptography",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.1.4-1ubuntu1.4+tuxcare.els1",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1788167137",
      "aliases": [
        "CLSA-2026-1788167137"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.1.4-1ubuntu1.4+tuxcare.els1"
                }
              ]
            }
          ],
          "package": {
            "name": "python-cryptography",
            "purl": "pkg:deb/tuxcare/python-cryptography?distro=ubuntu-18.04",
            "ecosystem": "TuxCare:Ubuntu:18.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1788167137.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.1.4-1ubuntu1.4+tuxcare.els1"
                }
              ]
            }
          ],
          "package": {
            "name": "python-cryptography-doc",
            "purl": "pkg:deb/tuxcare/python-cryptography-doc?distro=ubuntu-18.04",
            "ecosystem": "TuxCare:Ubuntu:18.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1788167137.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.1.4-1ubuntu1.4+tuxcare.els1"
                }
              ]
            }
          ],
          "package": {
            "name": "python3-cryptography",
            "purl": "pkg:deb/tuxcare/python3-cryptography?distro=ubuntu-18.04",
            "ecosystem": "TuxCare:Ubuntu:18.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1788167137.json"
          }
        }
      ],
      "modified": "2026-10-26T09:43:11.318148228Z",
      "provider": "osv",
      "upstream": [
        "CVE-2020-25659",
        "CVE-2023-27043",
        "CVE-2023-50782"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/ubuntu18.04els/CLSA-2026-1788167137.html",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-50782"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2020-25659",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2023-27043",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2023-50782",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 449743,
  "published_at": "2026-08-31T09:05:48+00:00"
}