OpenBao Login MFA Bypasses Rate Limiting and TOTP Token Reuse

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/.

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N

过多认证尝试的限制不恰当

OpenBao 安全漏洞

OpenBao是OpenBao开源的一个敏感数据管理软件。 OpenBao 2.3.1及之前版本存在安全漏洞，该漏洞源于TOTP库对包含空白的代码进行了规范化处理，可能导致绕过内部速率限制和重用现有MFA代码。

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