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CVE-2015-1637

Estado: ModificadaMedia (4.3)—

Schannel (aka Secure Channel) in Microsoft Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 does not properly restrict TLS state transitions, which makes it easier for remote attackers to conduct cipher-downgrade attacks to EXPORT_RSA ciphers via crafted TLS traffic, related to the "FREAK" issue, a different vulnerability than CVE-2015-0204 and CVE-2015-1067.

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 (9)

Microsoft — Windows 7Microsoft — Windows 8Microsoft — Windows 8.1Microsoft — Windows RTMicrosoft — Windows RT 8.1Microsoft — Windows Server 2003Microsoft — Windows Server 2008Microsoft — Windows Server 2012Microsoft — Windows Vista

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2015-1637",
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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  "affected": [
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      "source": "secure@microsoft.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2015-03-06T17:59:00.070",
  "references": [
    {
      "url": "http://web.archive.org/web/20150321220028/https://freakattack.com/",
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://www.securityfocus.com/bid/72965",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-310"
        }
      ]
    }
  ],
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    {
      "lang": "en",
      "value": "Schannel (aka Secure Channel) in Microsoft Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 does not properly restrict TLS state transitions, which makes it easier for remote attackers to conduct cipher-downgrade attacks to EXPORT_RSA ciphers via crafted TLS traffic, related to the \"FREAK\" issue, a different vulnerability than CVE-2015-0204 and CVE-2015-1067."
    },
    {
      "lang": "es",
      "value": "Schannel (también conocido como Secure Channel) en Microsoft Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 y R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold y R2 y Windows RT Gold y 8.1 no restringe adecuadamente transiciones de estado TLS, lo que facilita a atacantes remotos llevar a cabo ataques de cifrado rebajado para cifrados EXPORT_RSA a través de tráfico TLS manipulado, relacionado con el problema \"FREAK\", una vulnerabilidad diferente a CVE-2015-0204 y CVE-2015-1067."
    }
  ],
  "lastModified": "2026-06-17T00:22:44.653",
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}