GHSA-5HM8-VH6R-2CJQ

Vulnerability from github – Published: 2022-08-18 19:03 – Updated: 2022-08-18 19:03
VLAI?
Summary
CodeIgniter Shield Vulnerable to SameSite Attackers Bypassing the CSRF Protection
Details

Impact

This vulnerability may allow SameSite Attackers to bypass the CodeIgniter4 CSRF protection mechanism with CodeIgniter Shield.

For this attack to succeed, the attacker must have direct (or indirect, e.g., XSS) control over a subdomain site (e.g., https://a.example.com/) of the target site (e.g., http://example.com/).

This vulnerability exists whether Config\Security::$csrfProtection is 'cookie' or 'session'. It is also exploitable whether Config\Security::$regenerate is true or false.

Patches

Upgrade to CodeIgniter v4.2.3 or later and Shield v1.0.0-beta.2 or later.

Workarounds

Do all of the following: - set Config\Security::$csrfProtection to 'session' - remove old session data right after login (immediately after ID and password match) - regenerate CSRF token right after login (immediately after ID and password match)

References

For more information

If you have any questions or comments about this advisory: * Open an issue or discussion in codeigniter4/shield * Email us at security@codeigniter.com

Severity ?
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:L
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "codeigniter4/shield"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.0.0-beta"
            },
            {
              "fixed": "1.0.0-beta.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.0-beta"
      ]
    }
  ],
  "aliases": [
    "CVE-2022-35943"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-352"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-08-18T19:03:34Z",
    "nvd_published_at": "2022-08-12T21:15:00Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\nThis vulnerability may allow [SameSite Attackers](https://canitakeyoursubdomain.name/) to bypass the [CodeIgniter4 CSRF protection](https://codeigniter4.github.io/userguide/libraries/security.html) mechanism with CodeIgniter Shield.\n\nFor this attack to succeed, the attacker must have direct (or indirect, e.g., XSS) control over a subdomain site (e.g., `https://a.example.com/`) of the target site (e.g., `http://example.com/`).\n\nThis vulnerability exists whether `Config\\Security::$csrfProtection` is `\u0027cookie\u0027` or `\u0027session\u0027`.\nIt is also exploitable whether `Config\\Security::$regenerate` is `true` or `false`.\n\n### Patches\nUpgrade to **CodeIgniter v4.2.3 or later** and **Shield v1.0.0-beta.2 or later**.\n\n### Workarounds\nDo all of the following:\n- set `Config\\Security::$csrfProtection` to `\u0027session\u0027`\n- remove old session data right after login (immediately after ID and password match)\n- regenerate CSRF token right after login (immediately after ID and password match)\n\n### References\n- [CodeIgniter4 CSRF Protection](https://codeigniter4.github.io/userguide/libraries/security.html)\n- [SameSite Attacks](https://canitakeyoursubdomain.name/)\n- [SameSite Cookies](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Set-Cookie/SameSite)\n- [The great SameSite confusion](https://jub0bs.com/posts/2021-01-29-great-samesite-confusion/)\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue or discussion in [codeigniter4/shield](https://github.com/codeigniter4/shield)\n* Email us at [security@codeigniter.com](mailto:security@codeigniter.com)\n",
  "id": "GHSA-5hm8-vh6r-2cjq",
  "modified": "2022-08-18T19:03:34Z",
  "published": "2022-08-18T19:03:34Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/codeigniter4/shield/security/advisories/GHSA-5hm8-vh6r-2cjq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-35943"
    },
    {
      "type": "WEB",
      "url": "https://github.com/codeigniter4/shield/commit/342a368536678621998c3c41d276480cd14ec6c6"
    },
    {
      "type": "WEB",
      "url": "https://codeigniter4.github.io/userguide/libraries/security.htm"
    },
    {
      "type": "WEB",
      "url": "https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Set-Cookie/SameSite"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/codeigniter4/shield"
    },
    {
      "type": "WEB",
      "url": "https://jub0bs.com/posts/2021-01-29-great-samesite-confusion"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "CodeIgniter Shield Vulnerable to SameSite Attackers Bypassing the CSRF Protection"
}


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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.