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CVE-2021-43518

Estado: ModificadaAlta (7.8)—

Teeworlds versiones hasta 0.7.5 incluyéndola, es vulnerable a un desbordamiento del búfer. Un analizador de mapas no comprueba el valor m_Channels procedente de un archivo de mapas, conllevando a un desbordamiento del búfer. Un servidor malicioso puede ofrecer un mapa especialmente diseñado que sobrescribirá la pila del cliente causando una denegación de servicio o una ejecución de código

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (2)

Fedoraproject — FedoraTeeworlds — Teeworlds

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-43518",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-12-15T15:15:10.857",
  "references": [
    {
      "url": "https://github.com/teeworlds/teeworlds/issues/2981",
      "tags": [
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        "Issue Tracking",
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      "source": "cve@mitre.org"
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      "source": "cve@mitre.org"
    },
    {
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      "tags": [
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        "Third Party Advisory"
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      "source": "cve@mitre.org"
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      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
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    {
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "https://mmmds.pl/fuzzing-map-parser-part-1-teeworlds/",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-120"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Teeworlds up to and including 0.7.5 is vulnerable to Buffer Overflow. A map parser does not validate m_Channels value coming from a map file, leading to a buffer overflow. A malicious server may offer a specially crafted map that will overwrite client's stack causing denial of service or code execution."
    },
    {
      "lang": "es",
      "value": "Teeworlds versiones hasta 0.7.5 incluyéndola, es vulnerable a un desbordamiento del búfer. Un analizador de mapas no comprueba el valor m_Channels procedente de un archivo de mapas, conllevando a un desbordamiento del búfer. Un servidor malicioso puede ofrecer un mapa especialmente diseñado que sobrescribirá la pila del cliente causando una denegación de servicio o una ejecución de código"
    }
  ],
  "lastModified": "2026-06-17T04:11:03.550",
  "configurations": [
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  "sourceIdentifier": "cve@mitre.org"
}