CVE-2016-4911 (GCVE-0-2016-4911)

Vulnerability from cvelistv5 – Published: 2016-06-13 14:00 – Updated: 2024-08-06 00:46
VLAI
Summary
The Fernet Token Provider in OpenStack Identity (Keystone) 9.0.x before 9.0.1 (mitaka) allows remote authenticated users to prevent revocation of a chain of tokens and bypass intended access restrictions by rescoping a token.
Severity
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CWE
  • n/a
Assigner
References
Date Public
2016-05-17 00:00
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-06T00:46:40.087Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://bugs.launchpad.net/keystone/+bug/1577558"
          },
          {
            "name": "[oss-security] 20160517 CVE request for vulnerability in OpenStack Keystone",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2016/05/17/10"
          },
          {
            "name": "90728",
            "tags": [
              "vdb-entry",
              "x_refsource_BID",
              "x_transferred"
            ],
            "url": "http://www.securityfocus.com/bid/90728"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://security.openstack.org/ossa/OSSA-2016-008.html"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://review.openstack.org/#/c/311886/"
          },
          {
            "name": "[oss-security] 20160517 Re: CVE request for vulnerability in OpenStack Keystone",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2016/05/17/11"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "datePublic": "2016-05-17T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "The Fernet Token Provider in OpenStack Identity (Keystone) 9.0.x before 9.0.1 (mitaka) allows remote authenticated users to prevent revocation of a chain of tokens and bypass intended access restrictions by rescoping a token."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2016-11-25T19:57:01.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://bugs.launchpad.net/keystone/+bug/1577558"
        },
        {
          "name": "[oss-security] 20160517 CVE request for vulnerability in OpenStack Keystone",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2016/05/17/10"
        },
        {
          "name": "90728",
          "tags": [
            "vdb-entry",
            "x_refsource_BID"
          ],
          "url": "http://www.securityfocus.com/bid/90728"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://security.openstack.org/ossa/OSSA-2016-008.html"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://review.openstack.org/#/c/311886/"
        },
        {
          "name": "[oss-security] 20160517 Re: CVE request for vulnerability in OpenStack Keystone",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2016/05/17/11"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2016-4911",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "The Fernet Token Provider in OpenStack Identity (Keystone) 9.0.x before 9.0.1 (mitaka) allows remote authenticated users to prevent revocation of a chain of tokens and bypass intended access restrictions by rescoping a token."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://bugs.launchpad.net/keystone/+bug/1577558",
              "refsource": "CONFIRM",
              "url": "https://bugs.launchpad.net/keystone/+bug/1577558"
            },
            {
              "name": "[oss-security] 20160517 CVE request for vulnerability in OpenStack Keystone",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2016/05/17/10"
            },
            {
              "name": "90728",
              "refsource": "BID",
              "url": "http://www.securityfocus.com/bid/90728"
            },
            {
              "name": "https://security.openstack.org/ossa/OSSA-2016-008.html",
              "refsource": "CONFIRM",
              "url": "https://security.openstack.org/ossa/OSSA-2016-008.html"
            },
            {
              "name": "https://review.openstack.org/#/c/311886/",
              "refsource": "CONFIRM",
              "url": "https://review.openstack.org/#/c/311886/"
            },
            {
              "name": "[oss-security] 20160517 Re: CVE request for vulnerability in OpenStack Keystone",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2016/05/17/11"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2016-4911",
    "datePublished": "2016-06-13T14:00:00.000Z",
    "dateReserved": "2016-05-17T00:00:00.000Z",
    "dateUpdated": "2024-08-06T00:46:40.087Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2016-4911",
      "date": "2026-09-22",
      "epss": "0.01402",
      "percentile": "0.71344"
    },
    "nvd": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:keystone:openstack_identity:9.0.0.0:rc1:*:*:*:*:*:*",
                    "matchCriteriaId": "B88FDEF2-E782-485E-80D4-1ADACE60FC66",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:keystone:openstack_identity:9.0.0.0:rc2:*:*:*:*:*:*",
                    "matchCriteriaId": "6913A9FE-14FC-4B11-A364-63476ED92D62",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:keystone:openstack_identity:9.0.0.0:rc3:*:*:*:*:*:*",
                    "matchCriteriaId": "570EAE79-D60E-4254-92F9-1CDA91AFDB43",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "The Fernet Token Provider in OpenStack Identity (Keystone) 9.0.x before 9.0.1 (mitaka) allows remote authenticated users to prevent revocation of a chain of tokens and bypass intended access restrictions by rescoping a token."
          },
          {
            "lang": "es",
            "value": "El Fernet Token Provider en OpenStack Identity (Keystone) 9.0.x en versiones anteriores a 9.0.1 (mitaka) permite a usuarios remotos autenticados prevenir la revocaci\u00f3n de una cadena de tokens y eludir las restricciones destinadas al acceso mediante un token con alcance ampliado."
          }
        ],
        "id": "CVE-2016-4911",
        "lastModified": "2026-05-06T22:30:45.220",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "NETWORK",
                "authentication": "SINGLE",
                "availabilityImpact": "NONE",
                "baseScore": 4.0,
                "confidentialityImpact": "NONE",
                "integrityImpact": "PARTIAL",
                "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:N",
                "version": "2.0"
              },
              "exploitabilityScore": 8.0,
              "impactScore": 2.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 4.3,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "LOW",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 2.8,
              "impactScore": 1.4,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2016-06-13T14:59:07.323",
        "references": [
          {
            "source": "cve@mitre.org",
            "tags": [
              "Mailing List"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2016/05/17/10"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Mailing List"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2016/05/17/11"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://www.securityfocus.com/bid/90728"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://bugs.launchpad.net/keystone/+bug/1577558"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://review.openstack.org/#/c/311886/"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "https://security.openstack.org/ossa/OSSA-2016-008.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2016/05/17/10"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2016/05/17/11"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://www.securityfocus.com/bid/90728"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://bugs.launchpad.net/keystone/+bug/1577558"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://review.openstack.org/#/c/311886/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "https://security.openstack.org/ossa/OSSA-2016-008.html"
          }
        ],
        "sourceIdentifier": "cve@mitre.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-284"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-04T21:57:40+00:00",
      "cve": "CVE-2016-4911",
      "id": "CVE-2016-4911",
      "initial_release_date": "2016-05-17T00:00:00+00:00",
      "product_status:known_not_affected": "13",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "openstack-keystone: Incorrect Audit IDs in Keystone Fernet Tokens can result in revocation bypass",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2016/cve-2016-4911.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.


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.