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GHSA-rxp7-9q75-vj3p

OpenBao Login MFA Bypass of Rate Limiting and TOTP Token Reuse

Source: GitHub Advisory Database (reviewed) Moderate CVE-2025-55003

Packages

EcosystemPackageAffectedFixed in
Go github.com/openbao/openbao >= 0.1.0, < 2.3.2 2.3.2
Go github.com/openbao/openbao < 0.0.0-20250807113757-8340a6918f6c 0.0.0-20250807113757-8340a6918f6c

Details

As written in the advisory (Markdown source, shown as plain text).

### 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

References

External links from the advisory. They lead to third-party sites.