vulnerability
Alpine Linux: CVE-2025-55003: Improper Restriction of Excessive Authentication Attempts
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 6 | (AV:N/AC:M/Au:S/C:C/I:N/A:N) | Aug 9, 2025 | Oct 27, 2025 | Dec 5, 2025 |
Severity
6
CVSS
(AV:N/AC:M/Au:S/C:C/I:N/A:N)
Published
Aug 9, 2025
Added
Oct 27, 2025
Modified
Dec 5, 2025
Description
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/.
Solution
alpine-linux-upgrade-openbao
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