FKIE_CVE-2021-3856

Vulnerability from fkie_nvd - Published: 2022-08-26 16:15 - Updated: 2024-11-21 06:22
Severity
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Summary
ClassLoaderTheme and ClasspathThemeResourceProviderFactory allows reading any file available as a resource to the classloader. By sending requests for theme resources with a relative path from an external HTTP client, the client will receive the content of random files if available.
References
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2021-3856Vendor Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2010164Issue Tracking, Vendor Advisory
secalert@redhat.comhttps://github.com/keycloak/keycloak/commit/73f0474008e1bebd0733e62a22aceda9e5de6743Patch, Third Party Advisory
secalert@redhat.comhttps://github.com/keycloak/keycloak/pull/8588Patch, Third Party Advisory
secalert@redhat.comhttps://issues.redhat.com/browse/KEYCLOAK-19422Permissions Required, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/security/cve/CVE-2021-3856Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=2010164Issue Tracking, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/keycloak/keycloak/commit/73f0474008e1bebd0733e62a22aceda9e5de6743Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/keycloak/keycloak/pull/8588Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://issues.redhat.com/browse/KEYCLOAK-19422Permissions Required, Vendor Advisory
Impacted products
Vendor Product Version
redhat keycloak *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "08FEF5EB-2BDF-45E6-988A-D9B04FC9281D",
              "versionEndExcluding": "15.1.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "ClassLoaderTheme and ClasspathThemeResourceProviderFactory allows reading any file available as a resource to the classloader. By sending requests for theme resources with a relative path from an external HTTP client, the client will receive the content of random files if available."
    },
    {
      "lang": "es",
      "value": "ClassLoaderTheme y ClasspathThemeResourceProviderFactory permiten leer cualquier archivo disponible como recurso para el cargador de clases. Al enviar peticiones de recursos de temas con una ruta relativa desde un cliente HTTP externo, el cliente recibir\u00e1 el contenido de archivos aleatorios si est\u00e1n disponibles."
    }
  ],
  "id": "CVE-2021-3856",
  "lastModified": "2024-11-21T06:22:39.990",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2022-08-26T16:15:09.570",
  "references": [
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://access.redhat.com/security/cve/CVE-2021-3856"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2010164"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/keycloak/keycloak/commit/73f0474008e1bebd0733e62a22aceda9e5de6743"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/keycloak/keycloak/pull/8588"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Permissions Required",
        "Vendor Advisory"
      ],
      "url": "https://issues.redhat.com/browse/KEYCLOAK-19422"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://access.redhat.com/security/cve/CVE-2021-3856"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2010164"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/keycloak/keycloak/commit/73f0474008e1bebd0733e62a22aceda9e5de6743"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/keycloak/keycloak/pull/8588"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Permissions Required",
        "Vendor Advisory"
      ],
      "url": "https://issues.redhat.com/browse/KEYCLOAK-19422"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-552"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Detection rules are retrieved from Rulezet.