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CVE-2016-7444

Estado: ModificadaAlta (7.5)—

The gnutls_ocsp_resp_check_crt function in lib/x509/ocsp.c in GnuTLS before 3.4.15 and 3.5.x before 3.5.4 does not verify the serial length of an OCSP response, which might allow remote attackers to bypass an intended certificate validation mechanism via vectors involving trailing bytes left by gnutls_malloc.

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 (1)

GNU — Gnutls

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2016-7444",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": true,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security@debian.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2016-09-27T15:59:12.517",
  "references": [
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2017-02/msg00005.html",
      "source": "security@debian.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/92893",
      "source": "security@debian.org"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2017:2292",
      "source": "security@debian.org"
    },
    {
      "url": "https://gitlab.com/gnutls/gnutls/commit/964632f37dfdfb914ebc5e49db4fa29af35b1de9",
      "tags": [
        "Patch"
      ],
      "source": "security@debian.org"
    },
    {
      "url": "https://lists.gnupg.org/pipermail/gnutls-devel/2016-September/008146.html",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "source": "security@debian.org"
    },
    {
      "url": "https://www.gnutls.org/security.html",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "security@debian.org"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2017-02/msg00005.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/92893",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2017:2292",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://gitlab.com/gnutls/gnutls/commit/964632f37dfdfb914ebc5e49db4fa29af35b1de9",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://lists.gnupg.org/pipermail/gnutls-devel/2016-September/008146.html",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.gnutls.org/security.html",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-264"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The gnutls_ocsp_resp_check_crt function in lib/x509/ocsp.c in GnuTLS before 3.4.15 and 3.5.x before 3.5.4 does not verify the serial length of an OCSP response, which might allow remote attackers to bypass an intended certificate validation mechanism via vectors involving trailing bytes left by gnutls_malloc."
    },
    {
      "lang": "es",
      "value": "La función gnutls_ocsp_resp_check_crt en lib/x509/ocsp.c en GnuTLS en versiones anteriores a 3.4.15 y 3.5.x en versiones anteriores a 3.5.4 no verifica la longitud de serie de una respuesta OCSP, lo que podría permitir a atacantes remotos eludir un mecanismo de validación destinada a certificados a través de vectores que involucran bytes finales dejados por gnutls_malloc."
    }
  ],
  "lastModified": "2026-06-17T00:53:04.800",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:gnu:gnutls:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BE2AE755-9003-4174-8F45-229FDE69B514",
              "versionEndIncluding": "3.4.14"
            },
            {
              "criteria": "cpe:2.3:a:gnu:gnutls:3.5.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2434168D-05A8-4300-9069-C55566A5EAA0"
            },
            {
              "criteria": "cpe:2.3:a:gnu:gnutls:3.5.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BACD6E9A-8CCA-44C3-AE54-BAABEAB5BB37"
            },
            {
              "criteria": "cpe:2.3:a:gnu:gnutls:3.5.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0D6FA626-AEE9-4E3B-8BE4-3F2D46FF072D"
            },
            {
              "criteria": "cpe:2.3:a:gnu:gnutls:3.5.3:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DCA302AC-1DE9-4D36-94B2-BB4411E9BF53"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security@debian.org"
}