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CVE-2026-31979

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CVE-2026-31979

Published: Mar 11, 2026

Modified: Mar 11, 2026

PUBLISHED

CVSS v3.1

8.8

HIGH

Description

Himmelblau is an interoperability suite for Microsoft Azure Entra ID and Intune. Prior to 3.1.0 and 2.3.8, the himmelblaud-tasks daemon, running as root, writes Kerberos cache files under /tmp/krb5cc_<uid> without symlink protections. Since commit 87a51ee, PrivateTmp is explicitly removed from the tasks daemon's systemd hardening, exposing it to the host /tmp. A local user can exploit this via symlink attacks to chown or overwrite arbitrary files, achieving local privilege escalation. This vulnerability is fixed in 3.1.0 and 2.3.8.

VendorProductVersions

himmelblau-idm

himmelblau

affected
>= 1.0.0, < 2.3.8
affected
>= 3.0.0-alpha, < 3.1.0

Weaknesses (CWE)

CWE-59

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

References

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