Security advisory

{
  "id": "49257227571ae1b54f1702c144db152b049344c6330a04be383bde8b1032278a",
  "url": "https://osv.dev/vulnerability/CVE-2021-20288",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-20288",
    "summary": "An authentication flaw was found in ceph in versions before 14.2.20. When the monitor handles CEPHX_GET_AUTH_SESSION_KEY requests, it doesn't sanitize other_keys, allowing key reuse. An attacker who can request a global_id can exploit the ability of any user to request a global_id previously associated with another user, as ceph does not force the reuse of old keys to generate new ones. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.",
    "evidence": "osv:CVE-2021-20288",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-20288",
      "aliases": [
        "BIT-ceph-2021-20288",
        "CVE-2021-20288"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ceph/ceph",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "5ef401921d7a88aea18ec7558f7f9374ebd8f5a6"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:linuxfoundation:ceph:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "14.2.21"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v14.2.20",
            "v14.2.19",
            "v14.2.18",
            "v14.2.17",
            "v14.2.13",
            "v14.2.16",
            "v14.2.15",
            "v14.2.14",
            "v14.2.12",
            "v14.2.11",
            "v14.2.10",
            "v14.2.8",
            "v14.2.5",
            "v14.2.7",
            "v14.2.6",
            "v14.2.3",
            "v14.2.2",
            "v14.2.1",
            "v14.2.0",
            "v14.0.0",
            "v13.0.0",
            "v11.0.0",
            "v0.19",
            "v0.18",
            "v0.9",
            "v0.7.3",
            "v0.7.2",
            "v0.7.1",
            "v0.6",
            "v0.5",
            "v0.4",
            "v0.2",
            "v0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-20288.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:25.527761377Z",
      "provider": "osv",
      "references": [
        "https://lists.debian.org/debian-lts-announce/2023/10/msg00034.html",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/362CEPPYF3YMJZBEJQUT3KDE2EHYYIYQ/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5BPIAYTRCWAU4XWCDBK2THEFVXSC4XGK/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JVWUKUUS5BCIFWRV3JCUQMAPJ4HIWSED/",
        "https://security.gentoo.org/glsa/202105-39",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1938031"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "10.0"
                  },
                  {
                    "last_affected": "10.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*",
              "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
              "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "32"
                  },
                  {
                    "last_affected": "32"
                  },
                  {
                    "introduced": "33"
                  },
                  {
                    "last_affected": "33"
                  },
                  {
                    "introduced": "34"
                  },
                  {
                    "last_affected": "34"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:redhat:ceph_storage:4.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "redhat:ceph_storage",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "4.0"
                  },
                  {
                    "last_affected": "4.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-20288",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 431383,
  "published_at": "2021-04-15T15:15:12.257+00:00"
}