CVE-2017-7559

Estado: ModificadaMedia (6.1)—

In Undertow 2.x before 2.0.0.Alpha2, 1.4.x before 1.4.17.Final, and 1.3.x before 1.3.31.Final, it was found that the fix for CVE-2017-2666 was incomplete and invalid characters are still allowed in the query string and path parameters. This could be exploited, in conjunction with a proxy that also permitted the invalid characters but with a different interpretation, to inject data into the HTTP response. By manipulating the HTTP response the attacker could poison a web-cache, perform an XSS attack, or obtain sensitive information from requests other than their own.

CVSS

Versión: 3.0
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Puntuación base: 6.1

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 1.91%
Percentil entre todas las CVEs puntuadas: 79
Fecha de la puntuación: 7/10/2026

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)

Redhat — Undertow

CWE

CWE-444
CWE-444

Referencias

JSON original (NVD)

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{
  "id": "CVE-2017-7559",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 4.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.0",
          "baseScore": 6.1,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.7,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "secalert@redhat.com",
      "affectedData": [
        {
          "vendor": "Red Hat, Inc.",
          "product": "undertow",
          "versions": [
            {
              "status": "affected",
              "version": "2.x before 2.0.0.Alpha2"
            },
            {
              "status": "affected",
              "version": "1.4.x before 1.4.17.Final"
            },
            {
              "status": "affected",
              "version": "1.3.x before 1.3.31.Final"
            }
          ]
        }
      ]
    }
  ],
  "published": "2018-01-10T15:29:00.317",
  "references": [
    {
      "url": "https://access.redhat.com/errata/RHSA-2017:3454",
      "tags": [
        "Vendor Advisory"
      ],
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    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2017:3455",
      "tags": [
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    },
    {
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    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2017:3458",
      "tags": [
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    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2018:0002",
      "tags": [
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    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2018:0003",
      "tags": [
        "Vendor Advisory"
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    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2018:0004",
      "tags": [
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    {
      "url": "https://access.redhat.com/errata/RHSA-2018:0005",
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    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2018:1322",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7559",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://issues.jboss.org/browse/UNDERTOW-1251",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2017:3454",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2017:3455",
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    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2017:3456",
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    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2017:3458",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2018:0002",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2018:0003",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2018:0004",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2018:0005",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2018:1322",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7559",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://issues.jboss.org/browse/UNDERTOW-1251",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "secalert@redhat.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-444"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-444"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Undertow 2.x before 2.0.0.Alpha2, 1.4.x before 1.4.17.Final, and 1.3.x before 1.3.31.Final, it was found that the fix for CVE-2017-2666 was incomplete and invalid characters are still allowed in the query string and path parameters. This could be exploited, in conjunction with a proxy that also permitted the invalid characters but with a different interpretation, to inject data into the HTTP response. By manipulating the HTTP response the attacker could poison a web-cache, perform an XSS attack, or obtain sensitive information from requests other than their own."
    },
    {
      "lang": "es",
      "value": "En Undertow 2.x anteriores a 2.0.0.Alpha2, 1.4.x anteriores a 1.4.17.Final y 1.3.x anteriores a 1.3.31.Final, se ha descubierto que la solución para CVE-2017-2666 era incompleta y los caracteres no válidos todavía se permitían en la cadena de la consulta y en los parámetros de la ruta. Esto se podría explotar junto con un proxy que también permita los caracteres no válidos, pero con una interpretación diferente, para inyectar datos en la respuesta HTTP. Manipulando la respuesta HTTP, el atacante podría envenenar un web-cache, realizar un ataque Cross-Site Scripting (XSS) u obtener información sensible de peticiones que no sean las suyas."
    }
  ],
  "lastModified": "2026-06-17T01:24:36.600",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:redhat:undertow:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6553EA3E-6D2E-4D2C-B89A-F4526D0B251E",
              "versionEndExcluding": "1.3.31",
              "versionStartIncluding": "1.3.0"
            },
            {
              "criteria": "cpe:2.3:a:redhat:undertow:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "06F12B32-A552-4B7E-9798-DE867BB05EDE",
              "versionEndExcluding": "1.4.17",
              "versionStartIncluding": "1.4.0"
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              "criteria": "cpe:2.3:a:redhat:undertow:2.0.0:alpha1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C560E34B-993B-47D9-BC10-910A518112B6"
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          ],
          "operator": "OR"
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  ],
  "sourceIdentifier": "secalert@redhat.com"
}