Security advisory

{
  "id": "c7a6c738037473877eff4609c50b94041070cafe8c223254f31f3fcb11d938f3",
  "url": "https://osv.dev/vulnerability/CVE-2020-12691",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-12691",
    "summary": "An issue was discovered in OpenStack Keystone before 15.0.1, and 16.0.0. Any authenticated user can create an EC2 credential for themselves for a project that they have a specified role on, and then perform an update to the credential user and project, allowing them to masquerade as another user. This potentially allows a malicious user to act as the admin on a project another user has the admin role on, which can effectively grant that user global admin privileges.",
    "evidence": "osv:CVE-2020-12691",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-12691",
      "aliases": [
        "CVE-2020-12691",
        "GHSA-4427-7f3w-mqv6",
        "PYSEC-2020-55"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openstack/keystone",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "95b2bbeab113d9f04d1c81f7f1b48bf692bce979"
                },
                {
                  "introduced": "dc9e9e32dfbf9fd9c58f9f8e2b35f0bcfd62328e"
                },
                {
                  "last_affected": "dc9e9e32dfbf9fd9c58f9f8e2b35f0bcfd62328e"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "15.0.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:openstack:keystone:16.0.0:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "16.0.0"
                      },
                      {
                        "last_affected": "16.0.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "16.0.0",
            "16.0.0.0rc2",
            "15.0.0.0rc2",
            "15.0.0",
            "15.0.0.0rc1",
            "14.0.0.0rc1",
            "14.0.0.0b2",
            "14.0.0.0b1",
            "13.0.0.0rc1",
            "13.0.0.0b3",
            "13.0.0.0b2",
            "13.0.0.0b1",
            "12.0.0.0rc1",
            "12.0.0.0b3",
            "12.0.0.0b2",
            "12.0.0.0b1",
            "11.0.0.0rc1",
            "11.0.0",
            "11.0.0.0b3",
            "11.0.0.0b2",
            "11.0.0.0b1",
            "10.0.0.0rc1",
            "10.0.0.0b3",
            "10.0.0.0b2",
            "10.0.0.0b1",
            "9.0.0.0rc1",
            "9.0.0.0b3",
            "9.0.0.0b2",
            "9.0.0.0b1",
            "8.0.0.0rc1",
            "8.0.0.0b3",
            "8.0.0.0b1",
            "8.0.0.0b2",
            "8.0.0a0",
            "2015.1.0rc1",
            "2015.1.0b3",
            "2015.1.0b2",
            "2015.1.0b1",
            "2014.2.rc1",
            "2014.2.b3",
            "2014.2.b2",
            "2014.2.b1",
            "2014.1.rc1",
            "2014.1.b3",
            "2014.1.b2",
            "2014.1.b1",
            "2013.2.rc1",
            "2013.2.b3",
            "2013.2.b1",
            "grizzly-2",
            "grizzly-1",
            "folsom-rc1",
            "folsom-2",
            "folsom-1",
            "essex-rc1",
            "essex-4",
            "2011.3"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-12691.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:43.264163617Z",
      "provider": "osv",
      "references": [
        "https://lists.apache.org/thread.html/re237267da268c690df5e1c6ea6a38a7fc11617725e8049490f58a6fa%40%3Ccommits.druid.apache.org%3E",
        "https://lists.apache.org/thread.html/re4ffc55cd2f1b55a26e07c83b3c22c3fe4bae6054d000a57fb48d8c2%40%3Ccommits.druid.apache.org%3E",
        "https://security.openstack.org/ossa/OSSA-2020-004.html",
        "https://usn.ubuntu.com/4480-1/",
        "https://www.openwall.com/lists/oss-security/2020/05/06/5",
        "https://bugs.launchpad.net/keystone/+bug/1872733"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*"
            ],
            "vendor_product": "canonical:ubuntu_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "18.04"
                  },
                  {
                    "last_affected": "18.04"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2020-12691",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 435594,
  "published_at": "2020-05-07T00:15:10.957+00:00"
}