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CVE-2025-59044

Himmelblau vulnerable to GID collision via group name-derived mapping (privilege escalation)

4.4 Medium

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.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
Low
Availability
None

Exploit likelihood

0.15%Up 0.1 points since Sep 10, 2025
90%50%10%1%

What each source reports

CVE List Score used4.4

Himmelblau vulnerable to GID collision via group name-derived mapping (privilege escalation)

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.

Record
CVE-2025-59044
CVSS 3.1
4.4 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Weakness
CWE-1188
Updated
2026-11-02
EUVDEUVD-2025-275154.4

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.

Record
EUVD-2025-27515
CVSS 3.1
4.4 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Updated
2026-11-02
NVD4.4

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.

Record
CVE-2025-59044
CVSS 3.1
4.4 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Weakness
CWE-1188
Updated
2026-11-02
OSV4.4

Himmelblau vulnerable to GID collision via group name-derived mapping (privilege escalation)

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.

Record
CVE-2025-59044
CVSS 3.1
4.4 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Weakness
CWE-1188
Updated
2026-11-02
OSVopenSUSE-SU-2025-20114-1No score

Security update for himmelblau

This update for himmelblau fixes the following issues:

  • Update to version 0.9.23+git.0.9776141:
    • CVE-2025-59044: Fixed GID collision of same-name groups allowing privilege escalation (bsc#1250687)
    • deps(rust): bump the all-cargo-updates group
    • CVE-2025-58160: tracing-subscriber: Fixed log pollution (bsc#1249013)
Record
openSUSE-SU-2025-20114-1
Updated
2026-11-02
OSVopenSUSE-SU-2025:20114-1No score

Security update for himmelblau

This update for himmelblau fixes the following issues:

  • Update to version 0.9.23+git.0.9776141:
    • CVE-2025-59044: Fixed GID collision of same-name groups allowing privilege escalation (bsc#1250687)
    • deps(rust): bump the all-cargo-updates group
    • CVE-2025-58160: tracing-subscriber: Fixed log pollution (bsc#1249013)
Record
openSUSE-SU-2025:20114-1
Updated
2026-11-02
OSVSUSE-SU-2025:21158-1No score

Security update for himmelblau

This update for himmelblau fixes the following issues:

  • Update to version 0.9.23+git.0.9776141:
    • CVE-2025-59044: Fixed GID collision of same-name groups allowing privilege escalation (bsc#1250687)
    • deps(rust): bump the all-cargo-updates group
    • CVE-2025-58160: tracing-subscriber: Fixed log pollution (bsc#1249013)
Record
SUSE-SU-2025:21158-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
himmelblau
SUSE:Linux Enterprise Server 16.0
From an advisory covering 2 CVEs
before 0.9.23+git.0.9776141-160000.1.1
0.9.23+git.0.9776141-160000.1.1
himmelblau
SUSE:Linux Enterprise Server for SAP applications 16.0
From an advisory covering 2 CVEs
before 0.9.23+git.0.9776141-160000.1.1
0.9.23+git.0.9776141-160000.1.1
himmelblau
openSUSE:Leap 16.0
From an advisory covering 2 CVEs
before 0.9.23+git.0.9776141-160000.1.1
0.9.23+git.0.9776141-160000.1.1

History

History
RecordedChangedSources
affected, facts
affected
first indexedCVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-59044 is a medium vulnerability (CVSS 4.4) in Himmelblau-idm Himmelblau, published September 9, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.15%, the 4th percentile. No source names a fixed version.

References

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