Security advisory

{
  "id": "4500f8e67fcb8175c97c8a8ef35cbb6c6fc4318bf4e456aaba0998d71be181ed",
  "url": "https://osv.dev/vulnerability/CVE-2020-35636",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-35636",
    "summary": "A code execution vulnerability exists in the Nef polygon-parsing functionality of CGAL libcgal CGAL-5.1.1 in Nef_S2/SNC_io_parser.h SNC_io_parser::read_sface() sfh->volume() OOB read. A specially crafted malformed file can lead to an out-of-bounds read and type confusion, which could lead to code execution. An attacker can provide malicious input to trigger this vulnerability.",
    "evidence": "osv:CVE-2020-35636",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2020-35636",
      "aliases": [
        "CVE-2020-35636"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/cgal/cgal",
              "type": "GIT",
              "events": [
                {
                  "introduced": "8b649c42a258e3db346f19cb3ae89eca5fea877d"
                },
                {
                  "last_affected": "8b649c42a258e3db346f19cb3ae89eca5fea877d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:cgal:computational_geometry_algorithms_library:5.1.1:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "5.1.1"
                      },
                      {
                        "last_affected": "5.1.1"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "5.1.1",
            "v5.1.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-35636.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:21.925541343Z",
      "provider": "osv",
      "references": [
        "https://lists.debian.org/debian-lts-announce/2022/12/msg00011.html",
        "https://security.gentoo.org/glsa/202305-34",
        "https://talosintelligence.com/vulnerability_reports/TALOS-2020-1225"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "10.0"
                  },
                  {
                    "last_affected": "10.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2020-35636",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 430581,
  "published_at": "2021-03-04T20:15:13.3+00:00"
}