Vulnerability-Lookup

CVE-2020-5255 (GCVE-0-2020-5255)

Vulnerability from cvelistv5 – Published: 2020-03-30 19:30 – Updated: 2024-08-04 08:22

Title

Prevent cache poisoning via a Response Content-Type header

Summary

In Symfony before versions 4.4.7 and 5.0.7, when a `Response` does not contain a `Content-Type` header, affected versions of Symfony can fallback to the format defined in the `Accept` header of the request, leading to a possible mismatch between the response's content and `Content-Type` header. When the response is cached, this can prevent the use of the website by other users. This has been patched in versions 4.4.7 and 5.0.7.

Severity

2.6 (Low)


                        
                          CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L

CWE

CWE-435 - Improper Interaction Between Multiple Correctly-Behaving Entities

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7681 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/symfony/symfony/security/advis…	x_refsource_CONFIRM
https://github.com/symfony/symfony/commit/dca3434…	x_refsource_MISC
https://symfony.com/blog/cve-2020-5255-prevent-ca…	x_refsource_MISC
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA

Impacted products

1 product

Vendor	Product	Version	CPE status
symfony	symfony	Affected: >= 4.4.0 and < 4.4.7 Affected: >= 5.0.0 and < 5.0.7	guessed

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            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://github.com/symfony/symfony/commit/dca343442e6a954f96a2609e7b4e9c21ed6d74e6"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://github.com/symfony/symfony/security/advisories/GHSA-mcx4-f5f5-4859"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/C36JLPHUPKDFAX6D5WYFC4ALO2K7RDUQ/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://symfony.com/blog/cve-2020-5255-prevent-cache-poisoning-via-a-response-content-type-header"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-435"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Secondary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-20"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2025-11-21T16:54:03+00:00",
      "cve": "CVE-2020-5255",
      "id": "CVE-2020-5255",
      "initial_release_date": "2020-03-30T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "php-symfony: Response without Content-Type header  could result in cache poisoning",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-5255.json",
      "version": "3"
    }
  }
}

CNVD-2020-22197

Vulnerability from cnvd - Published: 2020-04-09

Title

Sensio Labs Symfony输入验证错误漏洞

Description

Sensio Labs Symfony是法国Sensio Labs公司的一套免费的、基于MVC架构的PHP开发框架。该框架提供常用的功能组件及工具，可用于快速创建复杂的WEB程序。 Sensio Labs Symfony 4.4之前版本中存在安全漏洞。攻击者可利用该漏洞造成用户无法使用网站。

Severity

中

Patch Name

Sensio Labs Symfony输入验证错误漏洞的补丁

Patch Description

Sensio Labs Symfony是法国Sensio Labs公司的一套免费的、基于MVC架构的PHP开发框架。该框架提供常用的功能组件及工具，可用于快速创建复杂的WEB程序。 Sensio Labs Symfony 4.4之前版本中存在安全漏洞。攻击者可利用该漏洞造成用户无法使用网站。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://github.com/symfony/symfony/security/advisories/GHSA-mcx4-f5f5-4859

Impacted products

Name
Sensio Labs Symfony <4.4

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-5255"
    }
  },
  "description": "Sensio Labs Symfony\u662f\u6cd5\u56fdSensio Labs\u516c\u53f8\u7684\u4e00\u5957\u514d\u8d39\u7684\u3001\u57fa\u4e8eMVC\u67b6\u6784\u7684PHP\u5f00\u53d1\u6846\u67b6\u3002\u8be5\u6846\u67b6\u63d0\u4f9b\u5e38\u7528\u7684\u529f\u80fd\u7ec4\u4ef6\u53ca\u5de5\u5177\uff0c\u53ef\u7528\u4e8e\u5feb\u901f\u521b\u5efa\u590d\u6742\u7684WEB\u7a0b\u5e8f\u3002\n\nSensio Labs Symfony 4.4\u4e4b\u524d\u7248\u672c\u4e2d\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u7528\u6237\u65e0\u6cd5\u4f7f\u7528\u7f51\u7ad9\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttps://github.com/symfony/symfony/security/advisories/GHSA-mcx4-f5f5-4859",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-22197",
  "openTime": "2020-04-09",
  "patchDescription": "Sensio Labs Symfony\u662f\u6cd5\u56fdSensio Labs\u516c\u53f8\u7684\u4e00\u5957\u514d\u8d39\u7684\u3001\u57fa\u4e8eMVC\u67b6\u6784\u7684PHP\u5f00\u53d1\u6846\u67b6\u3002\u8be5\u6846\u67b6\u63d0\u4f9b\u5e38\u7528\u7684\u529f\u80fd\u7ec4\u4ef6\u53ca\u5de5\u5177\uff0c\u53ef\u7528\u4e8e\u5feb\u901f\u521b\u5efa\u590d\u6742\u7684WEB\u7a0b\u5e8f\u3002\r\n\r\nSensio Labs Symfony 4.4\u4e4b\u524d\u7248\u672c\u4e2d\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u7528\u6237\u65e0\u6cd5\u4f7f\u7528\u7f51\u7ad9\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Sensio Labs Symfony\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Sensio Labs Symfony \u003c4.4"
  },
  "serverity": "\u4e2d",
  "submitTime": "2020-03-31",
  "title": "Sensio Labs Symfony\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e"
}

FKIE_CVE-2020-5255

Vulnerability from fkie_nvd - Published: 2020-03-30 20:15 - Updated: 2026-06-17 03:21

Severity

2.6 (Low) - CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/symfony/symfony/commit/dca343442e6a954f96a2609e7b4e9c21ed6d74e6	Patch, Third Party Advisory
security-advisories@github.com	https://github.com/symfony/symfony/security/advisories/GHSA-mcx4-f5f5-4859	Third Party Advisory
security-advisories@github.com	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/C36JLPHUPKDFAX6D5WYFC4ALO2K7RDUQ/
security-advisories@github.com	https://symfony.com/blog/cve-2020-5255-prevent-cache-poisoning-via-a-response-content-type-header	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://github.com/symfony/symfony/commit/dca343442e6a954f96a2609e7b4e9c21ed6d74e6	Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://github.com/symfony/symfony/security/advisories/GHSA-mcx4-f5f5-4859	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/C36JLPHUPKDFAX6D5WYFC4ALO2K7RDUQ/
af854a3a-2127-422b-91ae-364da2661108	https://symfony.com/blog/cve-2020-5255-prevent-cache-poisoning-via-a-response-content-type-header	Third Party Advisory

Impacted products

	Vendor	Product	Version
	sensiolabs	symfony	*
	sensiolabs	symfony	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "symfony",
          "vendor": "symfony",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 4.4.0 and \u003c 4.4.7"
            },
            {
              "status": "affected",
              "version": "\u003e= 5.0.0 and \u003c 5.0.7"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "95F04BAB-4B76-4142-B000-67FA0A9F73F4",
              "versionEndExcluding": "4.4.7",
              "versionStartIncluding": "4.4.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "A656BCAC-1974-4E5D-B7E3-4162A6153A4B",
              "versionEndExcluding": "5.0.7",
              "versionStartIncluding": "5.0.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Symfony before versions 4.4.7 and 5.0.7, when a `Response` does not contain a `Content-Type` header, affected versions of Symfony can fallback to the format defined in the `Accept` header of the request, leading to a possible mismatch between the response\u0026#39;s content and `Content-Type` header. When the response is cached, this can prevent the use of the website by other users. This has been patched in versions 4.4.7 and 5.0.7."
    },
    {
      "lang": "es",
      "value": "En Symfony en versiones anteriores a las versiones 4.4.7 y 5.0.7, cuando una \"Response\" no contiene un encabezado \"Content-Type\", las versiones afectadas de Symfony pueden retroceder al formato definido en el encabezado \"Accept\" de la petici\u00f3n, conllevando a una posible falta de coincidencia entre el contenido response\u0027s y el encabezado \"Content-Type\". Cuando la respuesta es almacenada en cach\u00e9, esto puede impedir el uso del sitio web por otros usuarios. Esto ha sido parcheado en las versiones 4.4.7 y 5.0.7."
    }
  ],
  "id": "CVE-2020-5255",
  "lastModified": "2026-06-17T03:21:08.493",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "SINGLE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 4.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 8.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 2.6,
          "baseSeverity": "LOW",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 1.2,
        "impactScore": 1.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2020-03-30T20:15:19.570",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/symfony/symfony/commit/dca343442e6a954f96a2609e7b4e9c21ed6d74e6"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/symfony/symfony/security/advisories/GHSA-mcx4-f5f5-4859"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/C36JLPHUPKDFAX6D5WYFC4ALO2K7RDUQ/"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://symfony.com/blog/cve-2020-5255-prevent-cache-poisoning-via-a-response-content-type-header"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/symfony/symfony/commit/dca343442e6a954f96a2609e7b4e9c21ed6d74e6"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/symfony/symfony/security/advisories/GHSA-mcx4-f5f5-4859"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/C36JLPHUPKDFAX6D5WYFC4ALO2K7RDUQ/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://symfony.com/blog/cve-2020-5255-prevent-cache-poisoning-via-a-response-content-type-header"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-435"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

GHSA-MCX4-F5F5-4859

Vulnerability from github – Published: 2020-03-30 20:09 – Updated: 2021-01-08 20:25

Summary

Prevent cache poisoning via a Response Content-Type header in Symfony

Details

Description

When a Response does not contain a Content-Type header, Symfony falls back to the format defined in the Accept header of the request, leading to a possible mismatch between the response's content and Content-Type header. When the response is cached, this can lead to a corrupted cache where the cached format is not the right one.

Resolution

Symfony does not use the Accept header anymore to guess the Content-Type.

The patch for this issue is available here for the 4.4 branch.

Credits

I would like to thank Xavier Lacot from JoliCode for reporting & Yonel Ceruto and Tobias Schultze for fixing the issue.

Severity

2.6 (Low)


                  
                    CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "symfony/http-foundation"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.4.0"
            },
            {
              "fixed": "4.4.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "symfony/http-foundation"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.0.0"
            },
            {
              "fixed": "5.0.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "symfony/symfony"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.4.0"
            },
            {
              "fixed": "4.4.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "symfony/symfony"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.0.0"
            },
            {
              "fixed": "5.0.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2020-5255"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-435"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2020-03-30T19:28:58Z",
    "nvd_published_at": null,
    "severity": "LOW"
  },
  "details": "Description\n-----------\n\nWhen a `Response` does not contain a `Content-Type` header, Symfony falls back to the format defined in the `Accept` header of the request, leading to a possible mismatch between the response\u0027s content and `Content-Type` header. When the response is cached, this can lead to a corrupted cache where the cached format is not the right one.\n\nResolution\n----------\n\nSymfony does not use the `Accept` header anymore to guess the `Content-Type`.\n\nThe patch for this issue is available [here](https://github.com/symfony/symfony/commit/dca343442e6a954f96a2609e7b4e9c21ed6d74e6) for the 4.4 branch.\n\nCredits\n-------\n\nI would like to thank Xavier Lacot from JoliCode for reporting \u0026 Yonel Ceruto and Tobias Schultze for fixing the issue.",
  "id": "GHSA-mcx4-f5f5-4859",
  "modified": "2021-01-08T20:25:26Z",
  "published": "2020-03-30T20:09:16Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/symfony/symfony/security/advisories/GHSA-mcx4-f5f5-4859"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-5255"
    },
    {
      "type": "WEB",
      "url": "https://github.com/symfony/symfony/commit/dca343442e6a954f96a2609e7b4e9c21ed6d74e6"
    },
    {
      "type": "WEB",
      "url": "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-foundation/CVE-2020-5255.yaml"
    },
    {
      "type": "WEB",
      "url": "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2020-5255.yaml"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/C36JLPHUPKDFAX6D5WYFC4ALO2K7RDUQ"
    },
    {
      "type": "WEB",
      "url": "https://symfony.com/blog/cve-2020-5255-prevent-cache-poisoning-via-a-response-content-type-header"
    },
    {
      "type": "WEB",
      "url": "https://symfony.com/cve-2020-5255"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Prevent cache poisoning via a Response Content-Type header in Symfony"
}

GSD-2020-5255

Vulnerability from gsd - Updated: 2023-12-13 01:22

Details

Aliases

CVE-2020-5255

Aliases

CVE-2020-5255

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2020-5255",
    "description": "In Symfony before versions 4.4.7 and 5.0.7, when a `Response` does not contain a `Content-Type` header, affected versions of Symfony can fallback to the format defined in the `Accept` header of the request, leading to a possible mismatch between the response\u0026#39;s content and `Content-Type` header. When the response is cached, this can prevent the use of the website by other users. This has been patched in versions 4.4.7 and 5.0.7.",
    "id": "GSD-2020-5255"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-5255"
      ],
      "details": "In Symfony before versions 4.4.7 and 5.0.7, when a `Response` does not contain a `Content-Type` header, affected versions of Symfony can fallback to the format defined in the `Accept` header of the request, leading to a possible mismatch between the response\u0026#39;s content and `Content-Type` header. When the response is cached, this can prevent the use of the website by other users. This has been patched in versions 4.4.7 and 5.0.7.",
      "id": "GSD-2020-5255",
      "modified": "2023-12-13T01:22:03.665845Z",
      "schema_version": "1.4.0"
    }
  },
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        "ID": "CVE-2020-5255",
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        "TITLE": "Prevent cache poisoning via a Response Content-Type header"
      },
      "affects": {
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          }
        ]
      },
      "impact": {
        "cvss": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 2.6,
          "baseSeverity": "LOW",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L",
          "version": "3.1"
        }
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-435 Improper Interaction Between Multiple Correctly-Behaving Entities"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://github.com/symfony/symfony/security/advisories/GHSA-mcx4-f5f5-4859",
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            "url": "https://github.com/symfony/symfony/security/advisories/GHSA-mcx4-f5f5-4859"
          },
          {
            "name": "https://github.com/symfony/symfony/commit/dca343442e6a954f96a2609e7b4e9c21ed6d74e6",
            "refsource": "MISC",
            "url": "https://github.com/symfony/symfony/commit/dca343442e6a954f96a2609e7b4e9c21ed6d74e6"
          },
          {
            "name": "https://symfony.com/blog/cve-2020-5255-prevent-cache-poisoning-via-a-response-content-type-header",
            "refsource": "MISC",
            "url": "https://symfony.com/blog/cve-2020-5255-prevent-cache-poisoning-via-a-response-content-type-header"
          },
          {
            "name": "FEDORA-2020-fade6a8df7",
            "refsource": "FEDORA",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/C36JLPHUPKDFAX6D5WYFC4ALO2K7RDUQ/"
          }
        ]
      },
      "source": {
        "advisory": "GHSA-mcx4-f5f5-4859",
        "discovery": "UNKNOWN"
      }
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "\u003e=4.4.0,\u003c4.4.7||\u003e=5.0.0,\u003c5.0.7",
          "affected_versions": "All versions starting from 4.4.0 before 4.4.7, all versions starting from 5.0.0 before 5.0.7",
          "cvss_v2": "AV:N/AC:L/Au:S/C:N/I:N/A:P",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
          "cwe_ids": [
            "CWE-1035",
            "CWE-20",
            "CWE-937"
          ],
          "date": "2020-04-09",
          "description": "In Symfony, when a `Response` does not contain a `Content-Type` header, affected versions of Symfony can fallback to the format defined in the `Accept` header of the request, leading to a possible mismatch between the response content and `Content-Type` header. When the response is cached, this can prevent the use of the website by other users.",
          "fixed_versions": [
            "4.4.7",
            "5.0.7"
          ],
          "identifier": "CVE-2020-5255",
          "identifiers": [
            "CVE-2020-5255",
            "GHSA-mcx4-f5f5-4859"
          ],
          "not_impacted": "All versions before 4.4.0, all versions starting from 4.4.7 before 5.0.0, all versions starting from 5.0.7",
          "package_slug": "packagist/symfony/http-foundation",
          "pubdate": "2020-03-30",
          "solution": "Upgrade to versions 4.4.7, 5.0.7 or above.",
          "title": "Improper Input Validation",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2020-5255"
          ],
          "uuid": "29468dc3-f0e0-422d-9ae4-bd8d4be43f3f"
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "4.4.7",
                "versionStartIncluding": "4.4.0",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "5.0.7",
                "versionStartIncluding": "5.0.0",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
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            }
          ]
        },
        "problemtype": {
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        "references": {
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                "Third Party Advisory"
              ],
              "url": "https://github.com/symfony/symfony/security/advisories/GHSA-mcx4-f5f5-4859"
            },
            {
              "name": "https://github.com/symfony/symfony/commit/dca343442e6a954f96a2609e7b4e9c21ed6d74e6",
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                "Third Party Advisory"
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            {
              "name": "https://symfony.com/blog/cve-2020-5255-prevent-cache-poisoning-via-a-response-content-type-header",
              "refsource": "MISC",
              "tags": [
                "Third Party Advisory"
              ],
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            },
            {
              "name": "FEDORA-2020-fade6a8df7",
              "refsource": "FEDORA",
              "tags": [],
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/C36JLPHUPKDFAX6D5WYFC4ALO2K7RDUQ/"
            }
          ]
        }
      },
      "impact": {
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          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "SINGLE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 4.0,
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P",
            "version": "2.0"
          },
          "exploitabilityScore": 8.0,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
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          "exploitabilityScore": 2.8,
          "impactScore": 1.4
        }
      },
      "lastModifiedDate": "2020-04-09T17:15Z",
      "publishedDate": "2020-03-30T20:15Z"
    }
  }
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2020-5255 (GCVE-0-2020-5255)

CNVD-2020-22197

FKIE_CVE-2020-5255

GHSA-MCX4-F5F5-4859

Description

Resolution

Credits

GSD-2020-5255

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Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour