Offline host access via invalid Hello PIN
Published Jun 26, 2025 · Updated Aug 20, 2025
Improper authentication in Himmelblau 0.9.10 through 0.9.16 allows physically proximate attackers to access an offline Linux host. The acquire_token_by_hello_for_business_key function treats a nonce RequestFailed error as offline authentication success instead of validating that the supplied Hello key unlocks. Exploitation requires physical access, an offline host, and Hello PIN authentication enabled; it grants a local session, while SSO token issuance still fails.
Summary
What happened
Improper authentication in Himmelblau 0.9.10 through 0.9.16 allows physically proximate attackers to access an offline Linux host. The acquire_token_by_hello_for_business_key function treats a nonce RequestFailed error as offline authentication success instead of validating that the supplied Hello key unlocks. Exploitation requires physical access, an offline host, and Hello PIN authentication enabled; it grants a local session, while SSO token issuance still fails.
The record
- CVE
- CVE-2025-53013
- Published
- Jun 26, 2025
- Updated
- Aug 20, 2025
- Vendor
- Himmelblau
- Product
- Himmelblau
- Classifications
- CWE-287
- Attack vector
- physical
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 26, 2025CVE publishedPublication date reported by the CVE source.
- Aug 20, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=>= 0.9.10, < 0.9.17
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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