Upstream information
Description
Himmelblau is an interoperability suite for Microsoft Azure Entra ID and Intune. A vulnerability present in versions 0.9.10 through 0.9.16 allows a user to authenticate to a Linux host via Himmelblau using an *invalid* Linux Hello PIN, provided the host is offline. While the user gains access to the local system, Single Sign-On (SSO) fails due to the network being down and the inability to issue tokens (due to a failure to unlock the Hello key). The core issue lies in an incorrect assumption within the `acquire_token_by_hello_for_business_key` function: it was expected to return a `TPMFail` error for an invalid Hello key when offline, but instead, a preceding nonce request resulted in a `RequestFailed` error, leading the system to erroneously transition to an offline success state without validating the Hello key unlock. This impacts systems using Himmelblau for authentication when operating in an offline state with Hello PIN authentication enabled. Rocky Linux 8 (and variants) are not affected by this vulnerability. The problem is resolved in Himmelblau version 0.9.17. A workaround is available for users who cannot immediately upgrade. Disabling Hello PIN authentication by setting `enable_hello = false` in `/etc/himmelblau/himmelblau.conf` will mitigate the vulnerability.SUSE information
Overall state of this security issue: Resolved
This issue is currently rated as having moderate severity.
| CNA (GitHub) | SUSE | |
|---|---|---|
| Base Score | 5.2 | 5.2 |
| Vector | CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N | CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N |
| Attack Vector | Physical | Physical |
| Attack Complexity | Low | Low |
| Privileges Required | None | None |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality Impact | Low | High |
| Integrity Impact | High | Low |
| Availability Impact | None | None |
| CVSSv3 Version | 3.1 | 3.1 |
| SUSE | |
|---|---|
| Base Score | 4.3 |
| Vector | CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N |
| Attack Vector | Physical |
| Attack Complexity | Low |
| Attack Requirements | Present |
| Privileges Required | None |
| User Interaction | None |
| Vulnerable System Confidentiality Impact | High |
| Vulnerable System Integrity Impact | Low |
| Vulnerable System Availability Impact | None |
| Subsequent System Confidentiality Impact | None |
| Subsequent System Integrity Impact | None |
| Subsequent System Availability Impact | None |
| CVSSv4 Version | 4.0 |
List of released packages
| Product(s) | Fixed package version(s) | References |
|---|---|---|
| openSUSE Tumbleweed |
| Patchnames: openSUSE-Tumbleweed-2025-15229 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise Desktop 15 SP7 | himmelblau | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | himmelblau | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | himmelblau | Not affected |
| SUSE Linux Enterprise Server 15 SP7 | himmelblau | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | himmelblau | Not affected |
SUSE Timeline for this CVE
CVE page created: Thu Jun 26 22:01:37 2025CVE page last modified: Thu Jul 31 20:36:46 2025