Himmelblau: Authentication Bypass via Cross-User Local Session Impersonation in Device Authorization Grant (DAG) Flow
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| himmelblau-idm | himmelblau | affected |
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No data.
No data.
| Vendor | Product | Versions | ||||||||||||
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| Himmelblau-idm | Himmelblau |
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No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.246% probability within 30 days)
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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| Type | Values Removed | Values Added |
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| First Time appeared |
Himmelblau-idm
Himmelblau-idm himmelblau |
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| Vendors & Products |
Himmelblau-idm
Himmelblau-idm himmelblau |
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| Description | Himmelblau is an interoperability suite for Microsoft Azure Entra ID and Intune. From 2.0.0 to before 3.1.5 and 2.3.11, Himmelblau contained an authentication bypass vulnerability in the Device Authorization Grant (DAG) flow that allowed a user within the same Entra ID domain to obtain a local Unix session as another user by providing their own valid credentials. The vulnerability existed in the token_validate function, which validated domain aliases for legitimate multi-domain scenarios but failed to verify that the local part (username) of the authenticated user's UPN matched the requested account username. The function only compared domains, not the complete usernames. This vulnerability is fixed in 3.1.5 and 2.3.11. | |
| Title | Himmelblau: Authentication Bypass via Cross-User Local Session Impersonation in Device Authorization Grant (DAG) Flow | |
| Weaknesses | CWE-863 | |
| References |
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| Metrics |
cvssV3_1
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