CVE-2013-1762

Estado: ModificadaMedia (6.6)—
stunnel 4.21 through 4.54, when CONNECT protocol negotiation and NTLM authentication are enabled, does not correctly perform integer conversion, which allows remote proxy servers to execute arbitrary code via a crafted request that triggers a buffer overflow.
CVSS

Versión: 2.0
Vector: AV:N/AC:H/Au:N/C:P/I:P/A:C
Puntuación base: 6.6
Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 2.93%
Percentil entre todas las CVEs puntuadas: 87
Fecha de la puntuación: 5/10/2026
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 (1)

Stunnel — Stunnel
CWE

CWE-94
Referencias

JSON original (NVD)

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{
  "id": "CVE-2013-1762",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.6,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:H/Au:N/C:P/I:P/A:C",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "HIGH",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 8.5,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 4.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2013-03-08T18:55:01.743",
  "references": [
    {
      "url": "http://rhn.redhat.com/errata/RHSA-2013-0714.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.debian.org/security/2013/dsa-2664",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2013:130",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://wiki.mageia.org/en/Support/Advisories/MGASA-2013-0097",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://www.stunnel.org/CVE-2013-1762.html",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://rhn.redhat.com/errata/RHSA-2013-0714.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.debian.org/security/2013/dsa-2664",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2013:130",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://wiki.mageia.org/en/Support/Advisories/MGASA-2013-0097",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.stunnel.org/CVE-2013-1762.html",
      "tags": [
        "Vendor Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-94"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "stunnel 4.21 through 4.54, when CONNECT protocol negotiation and NTLM authentication are enabled, does not correctly perform integer conversion, which allows remote proxy servers to execute arbitrary code via a crafted request that triggers a buffer overflow."
    },
    {
      "lang": "es",
      "value": "stunnel v4.21 a v4.54, cuando el protocolo de negociación CONNECT y la autenticación NTLM están habilitadas, no realiza la conversión de enteros correctamente, lo que permite ejecutar código de su elección a servidores remotos proxy a través de una solicitud hecha a mano que dispara un desbordamiento de búfer.\r\n"
    }
  ],
  "lastModified": "2026-06-16T23:52:04.260",
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    {
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