GitHub Advisoryadvisory · Go

GHSA-rxp7-9q75-vj3p OpenBao Login MFA Bypass of Rate Limiting and TOTP Token Reuse

MEDIUM Published 2025-08-08 Modified 2025-08-11 Official page ↗
Aliases
CVE-2025-55003
Ecosystem
Go
Packages
github.com/openbao/openbao
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Weaknesses
CWE-307
Reviewed
2025-08-08

Affected packages

• Go github.com/openbao/openbao: >= 0.1.0, < 2.3.2 → fixed in 2.3.2 • Go github.com/openbao/openbao: < 0.0.0-20250807113757-8340a6918f6c → fixed in 0.0.0-20250807113757-8340a6918f6c

Description

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

Related

Alias · CVE (1)

  • CVE-2025-55003 OpenBao exists to provide a software solution to manage, store, and distribute sensitive data including secrets, certificates, and keys. vulnerability

Weakness · CWE (1)

  • CWE-307 Improper Restriction of Excessive Authentication Attempts weakness

References