Security advisory

{
  "id": "53b6edcc9611f83073638ce5965f7d2a659a84e9abaf548d95aee93697ee9698",
  "url": "https://osv.dev/vulnerability/CVE-2018-18541",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-18541",
    "summary": "In Teeworlds before 0.6.5, connection packets could be forged. There was no challenge-response involved in the connection build up. A remote attacker could send connection packets from a spoofed IP address and occupy all server slots, or even use them for a reflection attack using map download packets.",
    "evidence": "osv:CVE-2018-18541",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2018-18541",
      "aliases": [
        "CVE-2018-18541"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/teeworlds/teeworlds",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "344a58cd858669f2b742827024dff7fd25fccccf"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:teeworlds:teeworlds:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.6.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.6.5-rc",
            "0.6.4-release",
            "0.6.3-release",
            "0.6.2-release",
            "0.6.1-release",
            "0.6.0-release",
            "0.6-start",
            "0.5-endofline"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-18541.json",
            "vanir_signatures": [
              {
                "id": "CVE-2018-18541-c881deaf",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "199097209523499565481245254893803474346",
                    "79405543112078992577852416865792889683",
                    "321368320641149370519006774673267976761",
                    "145666099402921007004773993562282529692"
                  ]
                },
                "source": "https://github.com/teeworlds/teeworlds/commit/344a58cd858669f2b742827024dff7fd25fccccf",
                "target": {
                  "file": "src/game/server/gamecontext.cpp"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2018-18541-f57a6fcb",
                "digest": {
                  "length": 647,
                  "function_hash": "321614631417385662394245094589144205613"
                },
                "source": "https://github.com/teeworlds/teeworlds/commit/344a58cd858669f2b742827024dff7fd25fccccf",
                "target": {
                  "file": "src/game/server/gamecontext.cpp",
                  "function": "CGameContext::OnClientDrop"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T13:22:44Z"
          }
        }
      ],
      "modified": "2026-10-20T13:22:44.201933837Z",
      "provider": "osv",
      "references": [
        "https://teeworlds.com/?page=news&id=12544",
        "https://www.debian.org/security/2018/dsa-4329",
        "https://bugs.debian.org/911487",
        "https://github.com/teeworlds/teeworlds/issues/1536"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "9.0"
                  },
                  {
                    "last_affected": "9.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2018-18541",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 387589,
  "published_at": "2018-10-20T22:29:00.263+00:00"
}