ghsa-gq67-pp9w-43gp
Vulnerability from github
Published
2021-06-16 17:31
Modified
2021-05-07 21:12
Summary
Cryptographically weak CSRF tokens in Apache MyFaces
Details

In the default configuration, Apache MyFaces Core versions 2.2.0 to 2.2.13, 2.3.0 to 2.3.7, 2.3-next-M1 to 2.3-next-M4, and 3.0.0-RC1 use cryptographically weak implicit and explicit cross-site request forgery (CSRF) tokens. Due to that limitation, it is possible (although difficult) for an attacker to calculate a future CSRF token value and to use that value to trick a user into executing unwanted actions on an application.

Mitigation: Existing web.xml configuration parameters can be used to direct MyFaces to use SecureRandom for CSRF token generation:

org.apache.myfaces.RANDOM_KEY_IN_VIEW_STATE_SESSION_TOKEN=secureRandom org.apache.myfaces.RANDOM_KEY_IN_CSRF_SESSION_TOKEN=secureRandom org.apache.myfaces.RANDOM_KEY_IN_WEBSOCKET_SESSION_TOKEN=secureRandom

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.apache.myfaces.core:myfaces-core-module"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.25"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.apache.myfaces.core:myfaces-core-module"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.1.0"
            },
            {
              "fixed": "2.1.19"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.apache.myfaces.core:myfaces-core-module"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.2.0"
            },
            {
              "fixed": "2.2.14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.apache.myfaces.core:myfaces-core-module"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.3.0"
            },
            {
              "fixed": "2.3.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-26296"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-330",
      "CWE-352"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-05-07T21:12:38Z",
    "nvd_published_at": "2021-02-19T09:15:00Z",
    "severity": "HIGH"
  },
  "details": "In the default configuration, Apache MyFaces Core versions 2.2.0 to 2.2.13, 2.3.0 to 2.3.7, 2.3-next-M1 to 2.3-next-M4, and 3.0.0-RC1 use cryptographically weak implicit and explicit cross-site request forgery (CSRF) tokens. Due to that limitation, it is possible (although difficult) for an attacker to calculate a future CSRF token value and to use that value to trick a user into executing unwanted actions on an application.\n\n\nMitigation:\nExisting web.xml configuration parameters can be used to direct\nMyFaces to use SecureRandom for CSRF token generation:\n\norg.apache.myfaces.RANDOM_KEY_IN_VIEW_STATE_SESSION_TOKEN=secureRandom\norg.apache.myfaces.RANDOM_KEY_IN_CSRF_SESSION_TOKEN=secureRandom\norg.apache.myfaces.RANDOM_KEY_IN_WEBSOCKET_SESSION_TOKEN=secureRandom",
  "id": "GHSA-gq67-pp9w-43gp",
  "modified": "2021-05-07T21:12:38Z",
  "published": "2021-06-16T17:31:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-26296"
    },
    {
      "type": "WEB",
      "url": "https://github.com/apache/myfaces/commit/cc6e1cc7b9aa17e52452f7f2657b3af9c421b2b2"
    },
    {
      "type": "WEB",
      "url": "https://issues.apache.org/jira/browse/MYFACES-4373"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/r2b73e2356c6155e9ec78fdd8f72a4fac12f3e588014f5f535106ed9b%40%3Cannounce.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20210528-0007"
    },
    {
      "type": "WEB",
      "url": "http://packetstormsecurity.com/files/161484/Apache-MyFaces-2.x-Cross-Site-Request-Forgery.html"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2021/Feb/66"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "Cryptographically weak CSRF tokens in Apache MyFaces"
}


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