Recovery codes abuse in SFTPGo

{
  "id": "d34d015bdedd4fa3fec1dc10b6f4078c48b9e974bdf7781f2e7d03abbaf741b7",
  "url": "https://osv.dev/vulnerability/CVE-2022-36071",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Recovery codes abuse in SFTPGo",
    "summary": "SFTPGo is configurable SFTP server with optional HTTP/S, FTP/S and WebDAV support. SFTPGo WebAdmin and WebClient support login using TOTP (Time-based One Time Passwords) as a secondary authentication factor. Because TOTPs are often configured on mobile devices that can be lost, stolen or damaged, SFTPGo also supports recovery codes. These are a set of one time use codes that can be used instead of the TOTP. In SFTPGo versions from version 2.2.0 to 2.3.3 recovery codes can be generated before enabling two-factor authentication. An attacker who knows the user's password could potentially generate some recovery codes and then bypass two-factor authentication after it is enabled on the account at a later time. This issue has been fixed in version 2.3.4. Recovery codes can now only be generated after enabling two-factor authentication and are deleted after disabling it.",
    "evidence": "osv:CVE-2022-36071",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2022-36071",
      "aliases": [
        "CVE-2022-36071",
        "GHSA-54qx-8p8w-xhg8",
        "GO-2022-0964"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/drakkan/sftpgo",
              "type": "GIT",
              "events": [
                {
                  "introduced": "b6bcf0cd94fa7e87000f358350e99756f86d6418"
                },
                {
                  "fixed": "df84c42e7e8a1675769fa9065b2781a6abc8ab1b"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "2.2.0"
                      },
                      {
                        "fixed": "2.3.4"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "cpe": "cpe:2.3:a:sftpgo_project:sftpgo:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.2.0"
                      },
                      {
                        "fixed": "2.3.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.3.3",
            "v2.3.2",
            "v2.3.1",
            "v2.3.0",
            "v2.2.1",
            "v2.2.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-36071.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:36.295945464Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/36xxx/CVE-2022-36071.json",
        "https://github.com/drakkan/sftpgo/security/advisories/GHSA-54qx-8p8w-xhg8",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-36071",
        "https://github.com/drakkan/sftpgo/issues/965"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-287"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/36xxx/CVE-2022-36071.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-36071",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 503253,
  "published_at": "2022-09-02T17:15:12+00:00"
}