Vulnerability-Lookup

ubuntu-cve-2021-41267 Withdrawn 2025-06-23

Vulnerability from osv_ubuntu

Published

2021-11-24 19:15

Modified

2025-01-13 10:22

Summary

Details

Symfony/Http-Kernel is the HTTP kernel component for Symfony, a PHP framework for web and console applications and a set of reusable PHP components. Headers that are not part of the "trusted_headers" allowed list are ignored and protect users from "Cache poisoning" attacks. In Symfony 5.2, maintainers added support for the X-Forwarded-Prefix headers, but this header was accessible in SubRequest, even if it was not part of the "trusted_headers" allowed list. An attacker could leverage this opportunity to forge requests containing a X-Forwarded-Prefix header, leading to a web cache poisoning issue. Versions 5.3.12 and later have a patch to ensure that the X-Forwarded-Prefix header is not forwarded to subrequests when it is not trusted.

Severity

6.5 (Medium)


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

References

URL

Type

	https://ubuntu.com/security/CVE-2021-41267	REPORT
	https://github.com/symfony/symfony/security/advis…	REPORT
	https://github.com/symfony/symfony/commit/95dcf51…	REPORT
	https://github.com/symfony/symfony/releases/tag/v5.3.12	REPORT
	https://github.com/symfony/symfony/commit/95dcf51…	REPORT
	https://github.com/symfony/symfony/pull/44243	REPORT
	https://www.cve.org/CVERecord?id=CVE-2021-41267	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "ubuntu_priority": "medium"
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "symfony",
        "purl": "pkg:deb/ubuntu/symfony@5.4.4+dfsg-1ubuntu8?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.2.6+dfsg-1ubuntu7",
        "5.4.4+dfsg-1ubuntu8"
      ]
    },
    {
      "ecosystem_specific": {
        "ubuntu_priority": "medium"
      },
      "package": {
        "ecosystem": "Ubuntu:24.10",
        "name": "symfony",
        "purl": "pkg:deb/ubuntu/symfony@6.4.10+dfsg-1ubuntu1?arch=source\u0026distro=oracular"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.4.5+dfsg-3ubuntu3",
        "6.4.10+dfsg-1ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "ubuntu_priority": "medium"
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "symfony",
        "purl": "pkg:deb/ubuntu/symfony@6.4.5+dfsg-3ubuntu3?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.4.23+dfsg-1ubuntu1",
        "5.4.35+dfsg-3ubuntu1",
        "6.4.5+dfsg-3ubuntu2",
        "6.4.5+dfsg-3ubuntu3"
      ]
    }
  ],
  "aliases": [],
  "details": "Symfony/Http-Kernel is the HTTP kernel component for Symfony, a PHP framework for web and console applications and a set of reusable PHP components. Headers that are not part of the \"trusted_headers\" allowed list are ignored and protect users from \"Cache poisoning\" attacks. In Symfony 5.2, maintainers added support for the `X-Forwarded-Prefix` headers, but this header was accessible in SubRequest, even if it was not part of the \"trusted_headers\" allowed list. An attacker could leverage this opportunity to forge requests containing a `X-Forwarded-Prefix` header, leading to a web cache poisoning issue. Versions 5.3.12 and later have a patch to ensure that the `X-Forwarded-Prefix` header is not forwarded to subrequests when it is not trusted.",
  "id": "UBUNTU-CVE-2021-41267",
  "modified": "2025-01-13T10:22:37Z",
  "published": "2021-11-24T19:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-41267"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/symfony/symfony/security/advisories/GHSA-q3j3-w37x-hq2q"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/symfony/symfony/commit/95dcf51682029e89450aee86267e3d553aa7c487"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/symfony/symfony/releases/tag/v5.3.12"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/symfony/symfony/commit/95dcf51682029e89450aee86267e3d553aa7c487"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/symfony/symfony/pull/44243"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-41267"
    }
  ],
  "related": [
    "CVE-2021-41267"
  ],
  "schema_version": "1.6.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "withdrawn": "2025-06-23T15:54:06Z"
}

CVE-2021-41267 (GCVE-0-2021-41267)

Vulnerability from cvelistv5 – Published: 2021-11-24 18:55 – Updated: 2024-08-04 03:08

Title

Webcache Poisoning in Symfony

Summary

Symfony/Http-Kernel is the HTTP kernel component for Symfony, a PHP framework for web and console applications and a set of reusable PHP components. Headers that are not part of the "trusted_headers" allowed list are ignored and protect users from "Cache poisoning" attacks. In Symfony 5.2, maintainers added support for the `X-Forwarded-Prefix` headers, but this header was accessible in SubRequest, even if it was not part of the "trusted_headers" allowed list. An attacker could leverage this opportunity to forge requests containing a `X-Forwarded-Prefix` header, leading to a web cache poisoning issue. Versions 5.3.12 and later have a patch to ensure that the `X-Forwarded-Prefix` header is not forwarded to subrequests when it is not trusted.

Severity

6.5 (Medium)


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

CWE

CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/symfony/symfony/pull/44243	x_refsource_MISC
https://github.com/symfony/symfony/releases/tag/v5.3.12	x_refsource_MISC
https://github.com/symfony/symfony/security/advis…	x_refsource_CONFIRM
https://github.com/symfony/symfony/commit/95dcf51…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
symfony	symfony	Affected: >= 5.2.0, < 5.3.12

Show details on NVD website

JSON

To clipboard

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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
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}

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.

Detection rules are retrieved from Rulezet.

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.