CVE-2018-6854

{"id": "CVE-2018-6854", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 7.2, "accessVector": "LOCAL", "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "authentication": "NONE", "integrityImpact": "COMPLETE", "accessComplexity": "LOW", "availabilityImpact": "COMPLETE", "confidentialityImpact": "COMPLETE"}, "acInsufInfo": true, "impactScore": 10.0, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 3.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV30": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "published": "2018-07-09T18:29:00.827", "references": [{"url": "http://seclists.org/fulldisclosure/2018/Jul/20", "tags": ["Mailing List", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://community.sophos.com/kb/en-us/131934", "tags": ["Patch", "Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://labs.nettitude.com/blog/cve-2018-6851-to-cve-2018-6857-sophos-privilege-escalation-vulnerabilities/", "tags": ["Exploit", "Technical Description", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "http://seclists.org/fulldisclosure/2018/Jul/20", "tags": ["Mailing List", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://community.sophos.com/kb/en-us/131934", "tags": ["Patch", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://labs.nettitude.com/blog/cve-2018-6851-to-cve-2018-6857-sophos-privilege-escalation-vulnerabilities/", "tags": ["Exploit", "Technical Description", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-119"}]}], "descriptions": [{"lang": "en", "value": "Sophos SafeGuard Enterprise before 8.00.5, SafeGuard Easy before 7.00.3, and SafeGuard LAN Crypt before 3.95.2 are vulnerable to Local Privilege Escalation via multiple IOCTLs, e.g., 0x8810200B, 0x8810200F, 0x8810201B, 0x8810201F, 0x8810202B, 0x8810202F, 0x8810203F, 0x8810204B, 0x88102003, 0x88102007, 0x88102013, 0x88102017, 0x88102027, 0x88102033, 0x88102037, 0x88102043, and 0x88102047. When some conditions in the user-controlled input buffer are not met, the driver writes an error code (0x2000001A) to a user-controlled address. Also, note that all the aforementioned IOCTLs use transfer type METHOD_NEITHER, which means that the I/O manager does not validate any of the supplied pointers and buffer sizes. So, even though the driver checks for input/output buffer sizes, it doesn't validate if the pointers to those buffers are actually valid. So, we can supply a pointer for the output buffer to a kernel address space address, and the error code will be written there. We can take advantage of this condition to modify the SEP_TOKEN_PRIVILEGES structure of the Token object belonging to the exploit process and grant SE_DEBUG_NAME privilege. This allows the exploit process to interact with higher privileged processes running as SYSTEM and execute code in their security context."}, {"lang": "es", "value": "Sophos SafeGuard Enterprise en versiones anteriores a la 8.00.5, SafeGuard Easy en versiones anteriores a la 7.00.3, y SafeGuard LAN Crypt en versiones anteriores a la 3.95.2 son vulnerables a una escalada de privilegios local mediante m\u00faltiples IOCTL. Por ejemplo: 0x8810200B, 0x8810200F, 0x8810201B, 0x8810201F, 0x8810202B, 0x8810202F, 0x8810203F, 0x8810204B, 0x88102003, 0x88102007, 0x88102013, 0x88102017, 0x88102027, 0x88102033, 0x88102037, 0x88102043 y 0x88102047. Cuando no se cumplen algunas condiciones en la entrada controlada por el usuario, el controlador escribe un c\u00f3digo de error (0x2000001A) en una direcci\u00f3n controlada por el usuario. Adem\u00e1s, se debe tener en cuenta que todos los IOCTL mencionados emplean tipos de transferencia METHOD_NEITHER, lo que significa que el gestor I/= no valida ninguno de los punteros provistos ni el tama\u00f1o de los b\u00faferes. Por ello, incluso aunque el controlador verifique el tama\u00f1o de los b\u00faferes de entrada o salida, no valida si los punteros a esos b\u00faferes son realmente v\u00e1lidos. Por lo tanto, podemos incluir un puntero para el b\u00fafer de salida a una direcci\u00f3n de espacio de direcci\u00f3n de kernel y el c\u00f3digo de error se escribir\u00e1 all\u00ed. Se puede aprovechar esta situaci\u00f3n para modificar la estructura SEP_TOKEN_PRIVILEGES del objeto Token que pertenece al proceso del exploit y otorgar privilegios SE_DEBUG_NAME. Esto permite que el proceso del exploit interact\u00fae con procesos con privilegios m\u00e1s elevados que se ejecutan como SYSTEM, ejecutando c\u00f3digo en su contexto de seguridad."}], "lastModified": "2024-11-21T04:11:17.883", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:sophos:safeguard_easy_device_encryption_client:6.00:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2F57138C-7C06-496F-994E-0966CE8212C0"}, {"criteria": "cpe:2.3:a:sophos:safeguard_easy_device_encryption_client:6.10:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C35D6EE3-06A4-4720-A41F-A853CBF5AD31"}, {"criteria": "cpe:2.3:a:sophos:safeguard_easy_device_encryption_client:7.00:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3EC3A868-4328-4C39-9846-8E1182E747CB"}, {"criteria": "cpe:2.3:a:sophos:safeguard_enterprise_client:5.60.3:vs-nfd:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1831A4DA-2F50-411A-924F-FF0E15A593A0"}, {"criteria": "cpe:2.3:a:sophos:safeguard_enterprise_client:6.00:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7D8F90D7-7D25-418F-AE85-AD1D7E60DD18"}, {"criteria": "cpe:2.3:a:sophos:safeguard_enterprise_client:6.00.1:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "864E1982-8947-4EF7-912D-CDFD74E8D134"}, {"criteria": "cpe:2.3:a:sophos:safeguard_enterprise_client:6.10:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "60BBA33F-853D-407B-975B-A9182B259DB9"}, {"criteria": "cpe:2.3:a:sophos:safeguard_enterprise_client:7.00:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "88E54DC4-12A5-452F-8DCE-890645585097"}, {"criteria": "cpe:2.3:a:sophos:safeguard_enterprise_client:8.00:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3075C40D-1FF9-46D0-80F3-2EF8E8423974"}, {"criteria": "cpe:2.3:a:sophos:safeguard_lan_crypt_client:3.90.1:ts:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4BCE0FAF-54C0-420D-BA05-F90848408515"}, {"criteria": "cpe:2.3:a:sophos:safeguard_lan_crypt_client:3.90.2:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4CD621BA-6AB7-427D-B6D0-D2D75D1ADC18"}, {"criteria": "cpe:2.3:a:sophos:safeguard_lan_crypt_client:3.95.1:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C82A7CD5-0703-47E1-BA4F-3797986CE139"}, {"criteria": "cpe:2.3:a:sophos:safeguard_lan_crypt_client:3.95.1:ts:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2D0F50CA-6C19-4ECF-97B7-6636A2756961"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}