CVE-2026-31979
8.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| himmelblau-idm | himmelblau | >= 1.0.0, < 2.3.8 | affected |
| himmelblau-idm | himmelblau | >= 3.0.0-alpha, < 3.1.0 | affected |
Weaknesses
- CWE-59: CWE-59: Improper Link Resolution Before File Access ('Link Following')
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: poc
- Automatable: no
- Technical Impact: total
References
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