Security advisory

{
  "id": "a7b182f0f5f49ccad90c616762b51f31e99165a35d73c7979e3bac8c5fb5a191",
  "url": "https://osv.dev/vulnerability/CVE-2018-1000807",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-1000807",
    "summary": "Python Cryptographic Authority pyopenssl version prior to version 17.5.0 contains a CWE-416: Use After Free vulnerability in X509 object handling that can result in Use after free can lead to possible denial of service or remote code execution.. This attack appear to be exploitable via Depends on the calling application and if it retains a reference to the memory.. This vulnerability appears to have been fixed in 17.5.0.",
    "evidence": "osv:CVE-2018-1000807",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2018-1000807",
      "aliases": [
        "CVE-2018-1000807",
        "GHSA-p28m-34f6-967q",
        "PYSEC-2018-23"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/pyca/pyopenssl",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "d21fcd810317aa7579af0c194a61af377ade7f0e"
                },
                {
                  "fixed": "e73818600065821d588af475b024f4eb518c3509"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:pyopenssl:pyopenssl:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "17.5.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "e73818600065821d588af475b024f4eb518c3509"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "17.4.0",
            "17.3.0",
            "17.2.0",
            "17.1.0",
            "16.2.0",
            "16.1.0",
            "16.0.0",
            "0.15.1",
            "0.15"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-1000807.json"
          }
        }
      ],
      "modified": "2026-10-20T10:50:15.777481857Z",
      "provider": "osv",
      "references": [
        "https://access.redhat.com/errata/RHSA-2019:0085",
        "https://usn.ubuntu.com/3813-1/",
        "https://github.com/pyca/pyopenssl/commit/e73818600065821d588af475b024f4eb518c3509",
        "https://github.com/pyca/pyopenssl/pull/723"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*"
            ],
            "vendor_product": "canonical:ubuntu_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "16.04"
                  },
                  {
                    "last_affected": "16.04"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "redhat:enterprise_linux_desktop",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "7.0"
                  },
                  {
                    "last_affected": "7.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "redhat:enterprise_linux_server",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "7.0"
                  },
                  {
                    "last_affected": "7.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "redhat:enterprise_linux_workstation",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "7.0"
                  },
                  {
                    "last_affected": "7.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:redhat:openstack:13:*:*:*:*:*:*:*"
            ],
            "vendor_product": "redhat:openstack",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "13"
                  },
                  {
                    "last_affected": "13"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2018-1000807",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 381467,
  "published_at": "2018-10-08T15:29:00.837+00:00"
}