CVE-2025-55000: OpenBao TOTP Secrets Engine Enables Code Reuse
Impact
OpenBao's TOTP secrets engine could accept valid codes multiple times rather than strictly-once. This was caused by unexpected normalization in the underlying TOTP library.
Patches
OpenBao v2.3.2 will patch this issue.
In patching, codes which were not normalized (strictly N numeric digits) will now be rejected. This is a potentially breaking change.
Workarounds
TOTP code verification is a privileged action; only trusted systems should be verifying codes. Ensure that all codes are first normalized before submitting to the OpenBao endpoint.
References
This issue was disclosed to HashiCorp and is the OpenBao equivalent of the following tickets:
- https://discuss.hashicorp.com/t/hcsec-2025-17-vault-totp-secrets-engine-code-reuse/76036 - https://nvd.nist.gov/vuln/detail/CVE-2025-6014
Other sources
OpenBao exists to provide a software solution to manage, store, and distribute sensitive data including secrets, certificates, and keys. In versions 0.1.0 through 2.3.1, OpenBao's TOTP secrets engine could accept valid codes multiple times rather than strictly-once. This was caused by unexpected normalization in the underlying TOTP library. To work around, ensure that all codes are first normalized before submitting to the OpenBao endpoint. TOTP code verification is a privileged action; only trusted systems should be verifying codes.
— MITRE
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2025-55000?
CVE-2025-55000 is classified as a high severity vulnerability due to the potential for valid codes to be reused multiple times.
How do I fix CVE-2025-55000?
To fix CVE-2025-55000, upgrade to OpenBao version 2.3.2 or later.
What software is affected by CVE-2025-55000?
CVE-2025-55000 affects OpenBao versions prior to 2.3.2.
What is the primary impact of CVE-2025-55000?
The primary impact of CVE-2025-55000 is that the TOTP secrets engine may accept valid codes more than once, compromising security.
Is there a patch available for CVE-2025-55000?
Yes, a patch for CVE-2025-55000 is included in OpenBao version 2.3.2.