Security advisory

{
  "id": "9d18246bae30aebed5cffecc5f324aac7090195320730483d17a4b65c72770ad",
  "url": "https://osv.dev/vulnerability/CVE-2020-14983",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-14983",
    "summary": "The server in Chocolate Doom 3.0.0 and Crispy Doom 5.8.0 doesn't validate the user-controlled num_players value, leading to a buffer overflow. A malicious user can overwrite the server's stack.",
    "evidence": "osv:CVE-2020-14983",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2020-14983",
      "aliases": [
        "CVE-2020-14983"
      ],
      "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/chocolate-doom/chocolate-doom",
              "type": "GIT",
              "events": [
                {
                  "introduced": "8777b99cf72daed3cae0aa0a0ee730dc6610de2d"
                },
                {
                  "last_affected": "8777b99cf72daed3cae0aa0a0ee730dc6610de2d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:chocolate-doom:chocolate_doom:3.0.0:-:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.0.0-NA"
                      },
                      {
                        "last_affected": "3.0.0-NA"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.0.0-NA",
            "chocolate-doom-3.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-14983.json"
          }
        },
        {
          "ranges": [
            {
              "repo": "https://github.com/fabiangreffrath/crispy-doom",
              "type": "GIT",
              "events": [
                {
                  "introduced": "a87c2f73392099179c88143c0bc2d019fb456cdd"
                },
                {
                  "last_affected": "a87c2f73392099179c88143c0bc2d019fb456cdd"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:chocolate-doom:crispy_doom:5.8.0:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "5.8.0"
                      },
                      {
                        "last_affected": "5.8.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "5.8.0",
            "crispy-doom-5.8.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-14983.json"
          }
        }
      ],
      "modified": "2026-10-24T10:47:48.425638474Z",
      "provider": "osv",
      "references": [
        "https://github.com/chocolate-doom/chocolate-doom/issues/1293"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:opensuse:backports:sle-15:sp1:*:*:*:*:*:*"
            ],
            "vendor_product": "opensuse:backports",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "sle-15-sp1"
                  },
                  {
                    "last_affected": "sle-15-sp1"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*",
              "cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*"
            ],
            "vendor_product": "opensuse:leap",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "15.1"
                  },
                  {
                    "last_affected": "15.1"
                  },
                  {
                    "introduced": "15.2"
                  },
                  {
                    "last_affected": "15.2"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2020-14983",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 441561,
  "published_at": "2020-06-22T20:15:11.38+00:00"
}