« Back to list

CVE-2018-14773

Status: ModifiedMedium (6.5)—

An issue was discovered in Http Foundation in Symfony 2.7.0 through 2.7.48, 2.8.0 through 2.8.43, 3.3.0 through 3.3.17, 3.4.0 through 3.4.13, 4.0.0 through 4.0.13, and 4.1.0 through 4.1.2. It arises from support for a (legacy) IIS header that lets users override the path in the request URL via the X-Original-URL or X-Rewrite-URL HTTP request header. These headers are designed for IIS support, but it's not verified that the server is in fact running IIS, which means anybody who can send these requests to an application can trigger this.

Read full descriptionShow less

This affects \Symfony\Component\HttpFoundation\Request::prepareRequestUri() where X-Original-URL and X_REWRITE_URL are both used. The fix drops support for these methods so that they cannot be used as attack vectors such as web cache poisoning.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (3)

Debian — Debian LinuxDrupal — DrupalSensiolabs — Symfony

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2018-14773",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2018-08-03T17:29:00.297",
  "references": [
    {
      "url": "http://www.securityfocus.com/bid/104943",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securitytracker.com/id/1041405",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/symfony/symfony/commit/e447e8b92148ddb3d1956b96638600ec95e08f6b",
      "tags": [
        "Issue Tracking",
        "Patch",
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2019/03/msg00009.html",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://seclists.org/bugtraq/2019/May/21",
      "tags": [
        "Issue Tracking",
        "Mailing List",
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://symfony.com/blog/cve-2018-14773-remove-support-for-legacy-and-risky-http-headers",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://www.debian.org/security/2019/dsa-4441",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://www.drupal.org/SA-CORE-2018-005",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/104943",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securitytracker.com/id/1041405",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/symfony/symfony/commit/e447e8b92148ddb3d1956b96638600ec95e08f6b",
      "tags": [
        "Issue Tracking",
        "Patch",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2019/03/msg00009.html",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://seclists.org/bugtraq/2019/May/21",
      "tags": [
        "Issue Tracking",
        "Mailing List",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://symfony.com/blog/cve-2018-14773-remove-support-for-legacy-and-risky-http-headers",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.debian.org/security/2019/dsa-4441",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.drupal.org/SA-CORE-2018-005",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in Http Foundation in Symfony 2.7.0 through 2.7.48, 2.8.0 through 2.8.43, 3.3.0 through 3.3.17, 3.4.0 through 3.4.13, 4.0.0 through 4.0.13, and 4.1.0 through 4.1.2. It arises from support for a (legacy) IIS header that lets users override the path in the request URL via the X-Original-URL or X-Rewrite-URL HTTP request header. These headers are designed for IIS support, but it's not verified that the server is in fact running IIS, which means anybody who can send these requests to an application can trigger this. This affects \\Symfony\\Component\\HttpFoundation\\Request::prepareRequestUri() where X-Original-URL and X_REWRITE_URL are both used. The fix drops support for these methods so that they cannot be used as attack vectors such as web cache poisoning."
    },
    {
      "lang": "es",
      "value": "Se ha descubierto un problema en Http Foundation en Symfony, desde la versión 2.7.0 hasta la 2.7.48, desde la versión 2.8.0 hasta la 2.8.43, desde la versión 3.3.0 hasta la 3.3.17, desde la versión 3.4.0 hasta la 3.4.13, desde la versión 4.0.0 hasta la 4.0.13 y desde la versión 4.1.0 hasta la 4.1.2. Se origina desde el soporte a una cabecera IIS (heredada) que deja que los usuarios sobrescriban la ruta en la URL de petición mediante la cabecera de petición HTTP X-Original-URL o X-Rewrite-URL. Estas cabeceras han sido diseñadas para ser compatibles con IIS, pero no está verificado que el servidor esté, de hecho, ejecutando IIS, lo que significa que cualquiera que pueda enviar estas peticiones a la aplicación puede desencadenar este problema. Esto afecta a \\Symfony\\Component\\HttpFoundation\\Request::prepareRequestUri() donde se emplean tanto X-Original-URL como X_REWRITE_URL. La solución elimina el soporte a estos métodos para que no puedan ser empleados como vectores de ataque, como el envenenamiento de la caché web."
    }
  ],
  "lastModified": "2026-06-17T01:41:36.613",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "75150355-4AEB-4409-B8AE-413A1A7E6EA5",
              "versionEndIncluding": "2.7.48",
              "versionStartExcluding": "2.7.0"
            },
            {
              "criteria": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D9158CA7-0193-4342-9A09-126D8F667591",
              "versionEndIncluding": "2.8.43",
              "versionStartIncluding": "2.8.0"
            },
            {
              "criteria": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "933F48FF-3D58-455A-85D5-563A5C454020",
              "versionEndIncluding": "3.3.17",
              "versionStartIncluding": "3.3.0"
            },
            {
              "criteria": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "09200F9D-A68B-4322-9626-7A869EC1E18A",
              "versionEndIncluding": "3.4.13",
              "versionStartIncluding": "3.4.0"
            },
            {
              "criteria": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "77747DC8-9E86-4619-A98F-CAC8BF7BA7B7",
              "versionEndIncluding": "4.0.13",
              "versionStartIncluding": "4.0.0"
            },
            {
              "criteria": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0261DC21-9664-4D09-AE19-632C0D083D48",
              "versionEndIncluding": "4.1.2",
              "versionStartIncluding": "4.1.0"
            }
          ],
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43"
            },
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252"
            }
          ],
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "60BDF39F-889D-47FE-9345-BBC78FBC1A44",
              "versionEndExcluding": "8.5.6",
              "versionStartIncluding": "8.0.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}