github - ghsa-xhfx-hgmf-v6vp

GHSA-XHFX-HGMF-V6VP

Vulnerability from github – Published: 2021-03-10 21:07 – Updated: 2025-05-29 23:26

Summary

October CMS vulnerable to Potential Host Header Poisoning on misconfigured servers

Details

Impact

When running on servers that are configured to accept a wildcard as a hostname (i.e. the server routes any request, regardless of the HOST header to an October CMS instance) the potential exists for Host Header Poisoning attacks to succeed. See the following resources for more information on Host Header Poisoning: - https://portswigger.net/web-security/host-header - https://dzone.com/articles/what-is-a-host-header-attack

Patches

A feature has been added in v1.1.2 to allow a set of trusted hosts to be specified in the application.

Workarounds

Apply https://github.com/octobercms/library/commit/f86fcbcd066d6f8b939e8fe897409d152b11c3c6 & https://github.com/octobercms/october/commit/f638d3f78cfe91d7f6658820f9d5e424306a3db0 to your installation manually if unable to upgrade to v1.1.2.
Check that the configuration setting cms.linkPolicy is set to force.

Alternative Workaround

Check to make sure that your web server does not accept any hostname when serving your web application.

Add an entry called testing.tld to your computer's host file and direct it to your server's IP address
Open the address testing.tld in your web browser
Make sure an October CMS website is not available at this address

If an October CMS website is returned, configure your webserver to only allow known hostnames. If you require assistance with this, please contact your server administrator.

References

Reported by Abdullah Hussam

For More Information

If you have any questions or comments about this advisory: * Email us at hello@octobercms.com

Threat Assessment

Screen Shot 2021-01-15 at 4 12 57 PM

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "october/backend"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.1.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-21265"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-644"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-03-10T21:07:08Z",
    "nvd_published_at": "2021-03-10T22:15:00Z",
    "severity": "LOW"
  },
  "details": "### Impact\nWhen running on servers that are configured to accept a wildcard as a hostname (i.e. the server routes any request, regardless of the HOST header to an October CMS instance) the potential exists for Host Header Poisoning attacks to succeed. See the following resources for more information on Host Header Poisoning:\n- https://portswigger.net/web-security/host-header\n- https://dzone.com/articles/what-is-a-host-header-attack\n\n### Patches\n\nA feature has been added in v1.1.2 to allow a set of trusted hosts to be specified in the application.\n\n### Workarounds\n\n- Apply https://github.com/octobercms/library/commit/f86fcbcd066d6f8b939e8fe897409d152b11c3c6 \u0026 https://github.com/octobercms/october/commit/f638d3f78cfe91d7f6658820f9d5e424306a3db0 to your installation manually if unable to upgrade to v1.1.2.\n\n- Check that the configuration setting `cms.linkPolicy` is set to `force`.\n\n### Alternative Workaround\n\nCheck to make sure that your web server does not accept any hostname when serving your web application.\n\n1. Add an entry called `testing.tld` to your computer\u0027s host file and direct it to your server\u0027s IP address\n2. Open the address `testing.tld` in your web browser\n3. Make sure an October CMS website is not available at this address\n\nIf an October CMS website is returned, configure your webserver to only allow known hostnames. If you require assistance with this, please contact your server administrator.\n\n### References\n\nReported by [Abdullah Hussam](https://github.com/ahussam)\n\n### For More Information\n\nIf you have any questions or comments about this advisory:\n* Email us at [hello@octobercms.com](mailto:hello@octobercms.com)\n\n### Threat Assessment\n\u003cimg width=\"1108\" alt=\"Screen Shot 2021-01-15 at 4 12 57 PM\" src=\"https://user-images.githubusercontent.com/7253840/104783859-92fb3600-574c-11eb-9e21-c0dc05d230a9.png\"\u003e",
  "id": "GHSA-xhfx-hgmf-v6vp",
  "modified": "2025-05-29T23:26:01Z",
  "published": "2021-03-10T21:07:25Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/octobercms/october/security/advisories/GHSA-xhfx-hgmf-v6vp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21265"
    },
    {
      "type": "WEB",
      "url": "https://github.com/octobercms/library/commit/f29865ae3db7a03be7c49294cd93980ec457f10d"
    },
    {
      "type": "WEB",
      "url": "https://github.com/octobercms/library/commit/f86fcbcd066d6f8b939e8fe897409d152b11c3c6"
    },
    {
      "type": "WEB",
      "url": "https://github.com/octobercms/october/commit/555ab61f2313f45d7d5d138656420ead536c5d30"
    },
    {
      "type": "WEB",
      "url": "https://github.com/octobercms/october/commit/f638d3f78cfe91d7f6658820f9d5e424306a3db0"
    },
    {
      "type": "WEB",
      "url": "https://packagist.org/packages/october/backend"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "October CMS vulnerable to Potential Host Header Poisoning on misconfigured servers"
}

CVE-2021-21265 (GCVE-0-2021-21265)

Vulnerability from cvelistv5 – Published: 2021-03-10 21:15 – Updated: 2025-05-29 23:27

Summary

October is a free, open-source, self-hosted CMS platform based on the Laravel PHP Framework. In October before version 1.1.2, when running on poorly configured servers (i.e. the server routes any request, regardless of the HOST header to an October CMS instance) the potential exists for Host Header Poisoning attacks to succeed. This has been addressed in version 1.1.2 by adding a feature to allow a set of trusted hosts to be specified in the application. As a workaround one may set the configuration setting cms.linkPolicy to force.

Severity ?

6.8 (Medium)


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

CWE

CWE-644 - Improper Neutralization of HTTP Headers for Scripting Syntax

Assigner

GitHub_M

References

URL

Tags

	https://github.com/octobercms/october/security/ad…	x_refsource_CONFIRM
	https://github.com/octobercms/library/commit/f298…	x_refsource_MISC
	https://github.com/octobercms/library/commit/f86f…	x_refsource_MISC
	https://github.com/octobercms/october/commit/555a…	x_refsource_MISC
	https://github.com/octobercms/october/commit/f638…	x_refsource_MISC
	https://packagist.org/packages/october/backend	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	octobercms	october	Affected: < 1.1.2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T18:09:15.269Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/octobercms/october/security/advisories/GHSA-xhfx-hgmf-v6vp"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/octobercms/library/commit/f86fcbcd066d6f8b939e8fe897409d152b11c3c6"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/octobercms/october/commit/f638d3f78cfe91d7f6658820f9d5e424306a3db0"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "october",
          "vendor": "octobercms",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.1.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "October is a free, open-source, self-hosted CMS platform based on the Laravel PHP Framework. In October before version 1.1.2, when running on poorly configured servers (i.e. the server routes any request, regardless of the HOST header to an October CMS instance) the potential exists for Host Header Poisoning attacks to succeed. This has been addressed in version 1.1.2 by adding a feature to allow a set of trusted hosts to be specified in the application. As a workaround one may set the configuration setting cms.linkPolicy to force."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-644",
              "description": "CWE-644: Improper Neutralization of HTTP Headers for Scripting Syntax",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-29T23:27:29.528Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/octobercms/october/security/advisories/GHSA-xhfx-hgmf-v6vp",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/octobercms/october/security/advisories/GHSA-xhfx-hgmf-v6vp"
        },
        {
          "name": "https://github.com/octobercms/library/commit/f29865ae3db7a03be7c49294cd93980ec457f10d",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/octobercms/library/commit/f29865ae3db7a03be7c49294cd93980ec457f10d"
        },
        {
          "name": "https://github.com/octobercms/library/commit/f86fcbcd066d6f8b939e8fe897409d152b11c3c6",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/octobercms/library/commit/f86fcbcd066d6f8b939e8fe897409d152b11c3c6"
        },
        {
          "name": "https://github.com/octobercms/october/commit/555ab61f2313f45d7d5d138656420ead536c5d30",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/octobercms/october/commit/555ab61f2313f45d7d5d138656420ead536c5d30"
        },
        {
          "name": "https://github.com/octobercms/october/commit/f638d3f78cfe91d7f6658820f9d5e424306a3db0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/octobercms/october/commit/f638d3f78cfe91d7f6658820f9d5e424306a3db0"
        },
        {
          "name": "https://packagist.org/packages/october/backend",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://packagist.org/packages/october/backend"
        }
      ],
      "source": {
        "advisory": "GHSA-xhfx-hgmf-v6vp",
        "discovery": "UNKNOWN"
      },
      "title": "October CMS vulnerable to Potential Host Header Poisoning on misconfigured servers"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2021-21265",
    "datePublished": "2021-03-10T21:15:15",
    "dateReserved": "2020-12-22T00:00:00",
    "dateUpdated": "2025-05-29T23:27:29.528Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-XHFX-HGMF-V6VP

Impact

Patches

Workarounds

Alternative Workaround

References

For More Information

Threat Assessment

CVE-2021-21265 (GCVE-0-2021-21265)

Tags

Sightings

Nomenclature