GHSA-RXP7-9Q75-VJ3P

Vulnerability from github – Published: 2025-08-08 14:44 – Updated: 2025-08-11 13:56
VLAI
Summary
OpenBao Login MFA Bypass of Rate Limiting and TOTP Token Reuse
Details

Impact

OpenBao's Login Multi-Factor Authentication (MFA) system allows enforcing MFA using Time-based One Time Password (TOTP). Due to normalization applied by the underlying TOTP library, codes were accepted which could contain whitespace; this whitespace could bypass internal rate limiting of the MFA method and allow reuse of existing MFA codes.

Patches

OpenBao v2.3.2 will patch this issue.

Workarounds

Use of rate-limiting quotas can limit an attacker's ability to exploit this: https://openbao.org/api-docs/system/rate-limit-quotas/

References

This issue was disclosed to HashiCorp and is the OpenBao equivalent of the following tickets:

  • https://discuss.hashicorp.com/t/hcsec-2025-19-vault-login-mfa-bypass-of-rate-limiting-and-totp-token-reuse/76038
  • https://nvd.nist.gov/vuln/detail/CVE-2025-6015
Severity
5.7 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/openbao/openbao"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.1.0"
            },
            {
              "fixed": "2.3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/openbao/openbao"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.0.0-20250807113757-8340a6918f6c"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-55003"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-307"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-08-08T14:44:49Z",
    "nvd_published_at": "2025-08-09T03:15:47Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nOpenBao\u0027s Login Multi-Factor Authentication (MFA) system allows enforcing MFA using Time-based One Time Password (TOTP). Due to normalization applied by the underlying TOTP library, codes were accepted which could contain whitespace; this whitespace could bypass internal rate limiting of the MFA method and allow reuse of existing MFA codes.\n\n### Patches\n\nOpenBao v2.3.2 will patch this issue.\n\n### Workarounds\n\nUse of rate-limiting quotas can limit an attacker\u0027s ability to exploit this: https://openbao.org/api-docs/system/rate-limit-quotas/\n\n### References\n\nThis issue was disclosed to HashiCorp and is the OpenBao equivalent of the following tickets:\n\n- https://discuss.hashicorp.com/t/hcsec-2025-19-vault-login-mfa-bypass-of-rate-limiting-and-totp-token-reuse/76038\n- https://nvd.nist.gov/vuln/detail/CVE-2025-6015",
  "id": "GHSA-rxp7-9q75-vj3p",
  "modified": "2025-08-11T13:56:53Z",
  "published": "2025-08-08T14:44:49Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openbao/openbao/security/advisories/GHSA-rxp7-9q75-vj3p"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-55003"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-6015"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openbao/openbao/commit/8340a6918f6c41d8f75b6c3845c376d9dc32ed19"
    },
    {
      "type": "WEB",
      "url": "https://discuss.hashicorp.com/t/hcsec-2025-19-vault-login-mfa-bypass-of-rate-limiting-and-totp-token-reuse/76038"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openbao/openbao"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "OpenBao Login MFA Bypass of Rate Limiting and TOTP Token Reuse"
}



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