Vulnerability-Lookup

SUSE-SU-2026:21437-1

Vulnerability from csaf_suse - Published: 2026-04-30 17:06 - Updated: 2026-04-30 17:06

Summary

Security update for himmelblau

Severity

Moderate

Notes

Title of the patch: Security update for himmelblau

Description of the patch: This update for himmelblau fixes the following issues: Update to version 2.3.9+git0.a9fd29b. Security issues fixed: - CVE-2026-34397: Fixed naming collision that can lead to local privilege escalation (bsc#1261324). Other updates and bugfixes: - update aws-lc-sys to 0.39.0 for security fixes - update rustls-webpki to 0.103.10 for CRL revocation fix - Version 2.3.9: * packaging: fix if/else block for debian's postrm * Update apparmor.unix-chkpwd.local (Issue #1252) * When Hello user encounters SSPR demand, be permissive * add tests for sudo_groups functionality * Fix config tests to ignore local host config * Do not clear $NOTIFY_SOCKET when calling sd_ready * Fix token cache 24h purge * broker: use SSO server nonce for PRT only when provided * Fix pam_himmelblau blocking local user password changes (#1199) * Remove unused File import * Use is_ascii_alphanumeric() for account_id validation * Fix path traversal in LoadProfilePhoto AccountsService writes * Drop initialization tracing span * himmelblau-hsm-pin-init: drop RemainAfterExit=yes * Add fallback behavior when consent is required * qr-greeter: enable extension without socket noise * debian: make install/remove noninteractive; reduce QR postinst noise; soften missing hello prt * Never respond with BadRequest without error detail * deps(rust): bump the all-cargo-updates group across 1 directory with 7 updates

Patchnames: SUSE-SLES-16.0-664

CVE-2026-34397

6.3 (Medium)


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

Affected products

Recommended 20 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Enterprise Server 16.0:himmelblau-2.3.9+git0.a9fd29b-160000.1.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 16.0:himmelblau-2.3.9+git0.a9fd29b-160000.1.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 16.0:himmelblau-qr-greeter-2.3.9+git0.a9fd29b-160000.1.1.noarch	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 16.0:himmelblau-sshd-config-2.3.9+git0.a9fd29b-160000.1.1.noarch	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 16.0:himmelblau-sso-2.3.9+git0.a9fd29b-160000.1.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 16.0:himmelblau-sso-2.3.9+git0.a9fd29b-160000.1.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 16.0:libnss_himmelblau2-2.3.9+git0.a9fd29b-160000.1.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 16.0:libnss_himmelblau2-2.3.9+git0.a9fd29b-160000.1.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 16.0:pam-himmelblau-2.3.9+git0.a9fd29b-160000.1.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 16.0:pam-himmelblau-2.3.9+git0.a9fd29b-160000.1.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP applications 16.0:himmelblau-2.3.9+git0.a9fd29b-160000.1.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP applications 16.0:himmelblau-2.3.9+git0.a9fd29b-160000.1.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP applications 16.0:himmelblau-qr-greeter-2.3.9+git0.a9fd29b-160000.1.1.noarch	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP applications 16.0:himmelblau-sshd-config-2.3.9+git0.a9fd29b-160000.1.1.noarch	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP applications 16.0:himmelblau-sso-2.3.9+git0.a9fd29b-160000.1.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP applications 16.0:himmelblau-sso-2.3.9+git0.a9fd29b-160000.1.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP applications 16.0:libnss_himmelblau2-2.3.9+git0.a9fd29b-160000.1.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP applications 16.0:libnss_himmelblau2-2.3.9+git0.a9fd29b-160000.1.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP applications 16.0:pam-himmelblau-2.3.9+git0.a9fd29b-160000.1.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP applications 16.0:pam-himmelblau-2.3.9+git0.a9fd29b-160000.1.1.x86_64	—	Vendor Fix

Threats

Impact moderate

References

9 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/s…	self
https://www.suse.com/support/update/announcement/…	self
https://lists.suse.com/pipermail/sle-security-upd…	self
https://bugzilla.suse.com/1261324	self
https://bugzilla.suse.com/1261613	self
https://www.suse.com/security/cve/CVE-2026-34397/	self
https://www.suse.com/security/cve/CVE-2026-34397	external
https://bugzilla.suse.com/1261324	external

JSON

To clipboard

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      "text": "moderate"
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        "text": "This update for himmelblau fixes the following issues:\n\nUpdate to version 2.3.9+git0.a9fd29b.\n\nSecurity issues fixed:\n\n- CVE-2026-34397: Fixed naming collision that can lead to local privilege escalation (bsc#1261324).\n\nOther updates and bugfixes:\n\n- update aws-lc-sys to 0.39.0 for security fixes\n- update rustls-webpki to 0.103.10 for CRL revocation fix\n- Version 2.3.9:\n  * packaging: fix if/else block for debian\u0027s postrm\n  * Update apparmor.unix-chkpwd.local (Issue #1252)\n  * When Hello user encounters SSPR demand, be permissive\n  * add tests for sudo_groups functionality\n  * Fix config tests to ignore local host config\n  * Do not clear $NOTIFY_SOCKET when calling sd_ready\n  * Fix token cache 24h purge\n  * broker: use SSO server nonce for PRT only when provided\n  * Fix pam_himmelblau blocking local user password changes (#1199)\n  * Remove unused File import\n  * Use is_ascii_alphanumeric() for account_id validation\n  * Fix path traversal in LoadProfilePhoto AccountsService writes\n  * Drop initialization tracing span\n  * himmelblau-hsm-pin-init: drop RemainAfterExit=yes\n  * Add fallback behavior when consent is required\n  * qr-greeter: enable extension without socket noise\n  * debian: make install/remove noninteractive; reduce QR postinst noise; soften missing hello prt\n  * Never respond with BadRequest without error detail\n  * deps(rust): bump the all-cargo-updates group across 1 directory with 7 updates\n",
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  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-34397",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-34397"
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      ],
      "notes": [
        {
          "category": "general",
          "text": "Himmelblau is an interoperability suite for Microsoft Azure Entra ID and Intune. From versions 2.0.0-alpha to before 2.3.9 and 3.0.0-alpha to before 3.1.1, there is a conditional local privilege escalation vulnerability in an edge-case naming collision. Only authenticated himmelblau users whose mapped CN/short name exactly matches a privileged local group name (e.g., \"sudo\", \"wheel\", \"docker\", \"adm\") can cause the NSS module to resolve that group name to their fake primary group. If the system uses NSS results for group-based authorization decisions (sudo, polkit, etc.), this can grant the attacker the privileges of that group. This issue has been patched in versions 2.3.9 and 3.1.1.",
          "title": "CVE description"
        }
      ],
      "product_status": {
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          "summary": "CVE-2026-34397",
          "url": "https://www.suse.com/security/cve/CVE-2026-34397"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1261324 for CVE-2026-34397",
          "url": "https://bugzilla.suse.com/1261324"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
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        {
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      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-04-30T17:06:48Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2026-34397"
    }
  ]
}

CVE-2026-34397 (GCVE-0-2026-34397)

Vulnerability from cvelistv5 – Published: 2026-04-01 17:25 – Updated: 2026-04-04 03:05

Title

himmelblau: NSS fake-primary group lookup reintroduces name collision risk

Summary

Himmelblau is an interoperability suite for Microsoft Azure Entra ID and Intune. From versions 2.0.0-alpha to before 2.3.9 and 3.0.0-alpha to before 3.1.1, there is a conditional local privilege escalation vulnerability in an edge-case naming collision. Only authenticated himmelblau users whose mapped CN/short name exactly matches a privileged local group name (e.g., "sudo", "wheel", "docker", "adm") can cause the NSS module to resolve that group name to their fake primary group. If the system uses NSS results for group-based authorization decisions (sudo, polkit, etc.), this can grant the attacker the privileges of that group. This issue has been patched in versions 2.3.9 and 3.1.1.

Severity

6.3 (Medium)


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

CWE

CWE-269 - Improper Privilege Management

Assigner

GitHub_M

References

3 references

URL	Tags
https://github.com/himmelblau-idm/himmelblau/secu…	x_refsource_CONFIRM
https://github.com/himmelblau-idm/himmelblau/rele…	x_refsource_MISC
https://github.com/himmelblau-idm/himmelblau/rele…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
himmelblau-idm	himmelblau	Affected: >= 2.0.0-alpha, < 2.3.9 Affected: >= 3.0.0-alpha, < 3.1.1

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-34397",
                "options": [
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                    "Exploitation": "poc"
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                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-04T03:04:22.143352Z",
                "version": "2.0.3"
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        "providerMetadata": {
          "dateUpdated": "2026-04-04T03:05:13.451Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "himmelblau",
          "vendor": "himmelblau-idm",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 2.0.0-alpha, \u003c 2.3.9"
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      "metrics": [
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            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
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        "dateUpdated": "2026-04-01T17:25:06.034Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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          "name": "https://github.com/himmelblau-idm/himmelblau/security/advisories/GHSA-v7xx-7mqc-g835",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

SUSE-SU-2026:21437-1

CVE-2026-34397 (GCVE-0-2026-34397)

Tags

Sightings

Nomenclature