Vulnerability-Lookup

GHSA-H76R-VGF3-J6W5

Vulnerability from github – Published: 2021-08-30 16:13 – Updated: 2022-08-11 00:18

Summary

October CMS auth bypass and account takeover

Details

Impact

An attacker can exploit this vulnerability to bypass authentication using a specially crafted persist cookie.

To exploit this vulnerability, an attacker must obtain a Laravel’s secret key for cookie encryption and signing.
Due to the logic of how this mechanism works, a targeted user account must be logged in while the attacker is exploiting the vulnerability.
Authorization via persist cookie not shown in access logs.

Patches

Issue has been patched in Build 472 and v1.1.5
Shortened patch instructions

Workarounds

Apply https://github.com/octobercms/library/commit/016a297b1bec55d2e53bc889458ed2cb5c3e9374 and https://github.com/octobercms/library/commit/5bd1a28140b825baebe6becd4f7562299d3de3b9 to your installation manually if you are unable to upgrade.

[Update 2022-01-20] Shortened patch instructions can be found here.

Recommendations

We recommend the following steps to make sure your server stays secure:

Keep server OS and system software up to date.
Keep October CMS software up to date.
Use a multi-factor authentication plugin.
Change the default backend URL or block public access to the backend area.
Include the Roave/SecurityAdvisories Composer package to ensure that your application doesn't have installed dependencies with known security vulnerabilities.

References

Bugs found as part of Solar Security CMS Research. Credits to: • Andrey Basarygin • Andrey Guzei • Mikhail Khramenkov • Alexander Sidukov • Maxim Teplykh

For more information

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

Severity

7.4 (High)


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

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "october/system"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.0.472"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "october/system"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.1.1"
            },
            {
              "fixed": "1.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-29487"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-08-26T20:09:50Z",
    "nvd_published_at": "2021-08-26T19:15:00Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n\nAn attacker can exploit this vulnerability to bypass authentication using a specially crafted persist cookie.\n\n- To exploit this vulnerability, an attacker must obtain a Laravel\u2019s secret key for cookie encryption and signing.\n- Due to the logic of how this mechanism works, a targeted user account must be logged in while\nthe attacker is exploiting the vulnerability.\n- Authorization via persist cookie not shown in access logs.\n\n### Patches\n\n- Issue has been patched in Build 472 and v1.1.5\n- [Shortened patch instructions](https://github.com/daftspunk/CVE-2021-32648)\n\n### Workarounds\n\nApply https://github.com/octobercms/library/commit/016a297b1bec55d2e53bc889458ed2cb5c3e9374 and https://github.com/octobercms/library/commit/5bd1a28140b825baebe6becd4f7562299d3de3b9 to your installation manually if you are unable to upgrade.\n\n[**Update 2022-01-20**] [Shortened patch instructions](https://github.com/daftspunk/CVE-2021-32648) can be found here.\n\n### Recommendations\n\nWe recommend the following steps to make sure your server stays secure:\n\n- Keep server OS and system software up to date.\n- Keep October CMS software up to date.\n- Use a multi-factor authentication plugin.\n- Change the [default backend URL](https://github.com/octobercms/october/blob/1.1/config/cms.php#L39) or block public access to the backend area.\n- Include the [Roave/SecurityAdvisories](https://github.com/Roave/SecurityAdvisories) Composer package to ensure that your application doesn\u0027t have installed dependencies with known security vulnerabilities.\n\n### References\n\nBugs found as part of Solar Security CMS Research. Credits to:\n\u2022 Andrey Basarygin\n\u2022 Andrey Guzei\n\u2022 Mikhail Khramenkov\n\u2022 Alexander Sidukov\n\u2022 Maxim Teplykh\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Email us at [hello@octobercms.com](mailto:hello@octobercms.com)\n",
  "id": "GHSA-h76r-vgf3-j6w5",
  "modified": "2022-08-11T00:18:28Z",
  "published": "2021-08-30T16:13:50Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/octobercms/october/security/advisories/GHSA-h76r-vgf3-j6w5"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-29487"
    },
    {
      "type": "WEB",
      "url": "https://github.com/octobercms/library/commit/016a297b1bec55d2e53bc889458ed2cb5c3e9374"
    },
    {
      "type": "WEB",
      "url": "https://github.com/octobercms/library/commit/5bd1a28140b825baebe6becd4f7562299d3de3b9"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/octobercms/october"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "October CMS auth bypass and account takeover"
}

CVE-2021-29487 (GCVE-0-2021-29487)

Vulnerability from cvelistv5 – Published: 2021-08-26 19:00 – Updated: 2024-08-03 22:11

Title

Authentication bypass in Octobercms

Summary

octobercms in a CMS platform based on the Laravel PHP Framework. In affected versions of the october/system package an attacker can exploit this vulnerability to bypass authentication and takeover of and user account on an October CMS server. The vulnerability is exploitable by unauthenticated users via a specially crafted request. This only affects frontend users and the attacker must obtain a Laravel secret key for cookie encryption and signing in order to exploit this vulnerability. The issue has been patched in Build 472 and v1.1.5.

Severity

7.4 (High)


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

CWE

CWE-287 - Improper Authentication

Assigner

GitHub_M mitre root Scorecard

References

3 references

URL	Tags
https://github.com/octobercms/library/commit/016a…	x_refsource_MISC
https://github.com/octobercms/library/commit/5bd1…	x_refsource_MISC
https://github.com/octobercms/october/security/ad…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
octobercms	october	Affected: >= 1.0.471, < 1.0.472 Affected: >= 1.1.1, < 1.1.5

Show details on NVD website

JSON

To clipboard

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        }
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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.

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

GHSA-H76R-VGF3-J6W5

Impact

Patches

Workarounds

Recommendations

References

For more information

CVE-2021-29487 (GCVE-0-2021-29487)

Tags

Sightings

Nomenclature

Related by attack behaviour