Описание
OpenBao Login MFA Bypass of Rate Limiting and TOTP Token Reuse
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:
Ссылки
- https://github.com/openbao/openbao/security/advisories/GHSA-rxp7-9q75-vj3p
- https://nvd.nist.gov/vuln/detail/CVE-2025-55003
- https://nvd.nist.gov/vuln/detail/CVE-2025-6015
- https://github.com/openbao/openbao/commit/8340a6918f6c41d8f75b6c3845c376d9dc32ed19
- https://discuss.hashicorp.com/t/hcsec-2025-19-vault-login-mfa-bypass-of-rate-limiting-and-totp-token-reuse/76038
Пакеты
github.com/openbao/openbao
>= 0.1.0, < 2.3.2
2.3.2
github.com/openbao/openbao
< 0.0.0-20250807113757-8340a6918f6c
0.0.0-20250807113757-8340a6918f6c
Связанные уязвимости
OpenBao exists to provide a software solution to manage, store, and distribute sensitive data including secrets, certificates, and keys. In versions 2.3.1 and below, 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. This issue was fixed in version 2.3.2. To work around this, use of rate-limiting quotas can limit an attacker's ability to exploit this: https://openbao.org/api-docs/system/rate-limit-quotas/.
OpenBao exists to provide a software solution to manage, store, and di ...