CVE-2025-59044 Details
Description
Himmelblau is an interoperability suite for Microsoft Azure Entra ID and Intune. Himmelblau 0.9.x derives numeric GIDs for Entra ID groups from the group display name when himmelblau.conf `id_attr_map = name` (the default configuration). Because Microsoft Entra ID allows multiple groups with the same `displayName` (including end-user–created personal/O365 groups, depending on tenant policy), distinct directory groups can collapse to the same numeric GID on Linux. This issue only applies to Himmelblau versions 0.9.0 through 0.9.22. Any resource or service on a Himmelblau-joined host that enforces authorization by numeric GID (files/dirs, etc.) can be unintentionally accessible to a user who creates or joins a different Entra/O365 group that happens to share the same `displayName` as a privileged security group. Users should upgrade to 0.9.23, or 1.0.0 or later, to receive a patch. Group to GID mapping now uses Entra ID object IDs (GUIDs) and does not collide on same-name groups. As a workaround, use tenant policy hardening to restrict arbitrary group creation until all hosts are patched.
A privilege escalation vulnerability exists in the Himmelblau interoperability suite for Microsoft Azure Entra ID and Intune, specifically in versions 0.9.0 prior to 0.9.22. The issue arises because Himmelblau derives numeric group IDs (GIDs) from the display names of Entra ID groups, using a default configuration that maps group names to IDs. This mapping can lead to distinct directory groups collapsing into the same numeric GID on Linux, especially since Entra ID allows multiple groups to share the same display name. As a result, a user could gain unauthorized access to resources or services that rely on GID-based authorization by exploiting this naming collision.
Users are advised to upgrade to Himmelblau version 0.9.23 or 1.0.0 and later, where this vulnerability has been patched by changing the group-to-GID mapping to use Entra ID object IDs, which are unique and do not conflict with similarly named groups. As a temporary measure, organizations can restrict the creation of new groups through tenant policy hardening until all hosts are updated.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 9, 2025CISA-ADP
Assessed Sep 10, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/himmelblau-idm/himmelblau/commit/76c5b41df7f89378af65dc7c0d0484d7d41b3281 | [email protected] | Source CodeVendor |
| https://github.com/himmelblau-idm/himmelblau/security/advisories/GHSA-2m43-mmg9-3rgc | [email protected] | AdvisoryRemedyVendor |
| https://github.com/himmelblau-idm/himmelblau/security/advisories/GHSA-gcxr-m95v-qcf7 | [email protected] | AdvisoryNot ApplicableVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-1188 | Initialization of a Resource with an Insecure Default | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Himmelblau | All versions |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Sep 9, 2025 | New CVE Received | [email protected] |