ubuntu-cve-2021-41267
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
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"
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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