{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "cveId": "CVE-2025-49012",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2025-05-29T16:34:07.176Z",
        "datePublished": "2025-06-05T22:29:40.744Z",
        "dateUpdated": "2025-06-09T14:47:19.431Z"
    },
    "containers": {
        "cna": {
            "title": "Himmelblau's Name-Based Group Matching in `pam_allow_groups` Leads to Potential Security Bypass",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-287",
                            "lang": "en",
                            "description": "CWE-287: Improper Authentication",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 5.4,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "LOW",
                        "integrityImpact": "LOW",
                        "privilegesRequired": "LOW",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/himmelblau-idm/himmelblau/security/advisories/GHSA-gcxr-m95v-qcf7",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/himmelblau-idm/himmelblau/security/advisories/GHSA-gcxr-m95v-qcf7"
                },
                {
                    "name": "https://github.com/himmelblau-idm/himmelblau/issues/554",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/himmelblau-idm/himmelblau/issues/554"
                },
                {
                    "name": "https://github.com/himmelblau-idm/himmelblau/commit/918577f6a8392a71d9d3d67f20962c372a0c01c6",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/himmelblau-idm/himmelblau/commit/918577f6a8392a71d9d3d67f20962c372a0c01c6"
                },
                {
                    "name": "https://learn.microsoft.com/en-us/answers/questions/1035045/azure-ad-b2c-creates-groups-with-the-same-name-usi?utm_source=chatgpt.com",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://learn.microsoft.com/en-us/answers/questions/1035045/azure-ad-b2c-creates-groups-with-the-same-name-usi?utm_source=chatgpt.com"
                }
            ],
            "affected": [
                {
                    "vendor": "himmelblau-idm",
                    "product": "himmelblau",
                    "versions": [
                        {
                            "version": ">= 0.9.0, < 0.9.15",
                            "status": "affected"
                        },
                        {
                            "version": "= 1.0.0-alpha",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2025-06-05T22:29:40.744Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Himmelblau is an interoperability suite for Microsoft Azure Entra ID and Intune. Himmelblau versions 0.9.0 through 0.9.14 and 1.00-alpha are vulnerable to a privilege escalation issue when Entra ID group-based access restrictions are configured using group display names instead of object IDs. Starting in version 0.9.0, Himmelblau introduced support for specifying group names in the `pam_allow_groups` configuration option. However, Microsoft Entra ID permits the creation of multiple groups with the same `displayName` via the Microsoft Graph API—even by non-admin users, depending on tenant settings. As a result, a user could create a personal group with the same name as a legitimate access group (e.g., `\"Allow-Linux-Login\"`), add themselves to it, and be granted authentication or `sudo` rights by Himmelblau. Because affected Himmelblau versions compare group names by either `displayName` or by the immutable `objectId`, this allows bypassing access control mechanisms intended to restrict login to members of official, centrally-managed groups. This issue is fixed in Himmelblau version **0.9.15** and later. In these versions, group name matching in `pam_allow_groups` has been deprecated and removed, and only group `objectId`s (GUIDs) may be specified for secure group-based filtering. To mitigate the issue without upgrading, replace all entries in `pam_allow_groups` with the objectId of the target Entra ID group(s) and/or audit your tenant for groups with duplicate display names using the Microsoft Graph API."
                }
            ],
            "source": {
                "advisory": "GHSA-gcxr-m95v-qcf7",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2025-06-09T14:47:15.271416Z",
                                "id": "CVE-2025-49012",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2025-06-09T14:47:19.431Z"
                }
            }
        ]
    }
}