Show plain JSON{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A7B1384E-833A-4422-A6B1-F80FB3EA20B6", "versionEndIncluding": "4.17.2", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "descriptions": [{"lang": "en", "value": "An issue was discovered in the Linux kernel through 4.17.2. vbg_misc_device_ioctl() in drivers/virt/vboxguest/vboxguest_linux.c reads the same user data twice with copy_from_user. The header part of the user data is double-fetched, and a malicious user thread can tamper with the critical variables (hdr.size_in and hdr.size_out) in the header between the two fetches because of a race condition, leading to severe kernel errors, such as buffer over-accesses. This bug can cause a local denial of service and information leakage."}, {"lang": "es", "value": "Se ha descubierto un problema en el kernel de Linux hasta la versi\u00f3n 4.17.2. vbg_misc_device_ioctl() en drivers/virt/vboxguest/vboxguest_linux.c lee los mismos datos de usuario dos veces con copy_from_user. La cabecera de los datos de usuario es de tipo double-fetch y un hilo de usuario malicioso puede falsificar las variables cr\u00edticas (hdr.size_in y hdr.size_out) en la cabecera entre los dos fetch debido a una condici\u00f3n de carrera. Esto desemboca en varios errores del kernel, como accesos espec\u00edficos al b\u00fafer. Este error puede provocar una denegaci\u00f3n de servicio (DoS) local y una fuga de informaci\u00f3n."}], "id": "CVE-2018-12633", "lastModified": "2024-11-21T03:45:34.953", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 6.3, "confidentialityImpact": "COMPLETE", "integrityImpact": "NONE", "vectorString": "AV:L/AC:M/Au:N/C:C/I:N/A:C", "version": "2.0"}, "exploitabilityScore": 3.4, "impactScore": 9.2, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 6.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.0"}, "exploitabilityScore": 1.0, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2018-06-22T00:29:00.270", "references": [{"source": "cve@mitre.org", "tags": ["Patch", "Vendor Advisory"], "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bd23a7269834dc7c1f93e83535d16ebc44b75eba"}, {"source": "cve@mitre.org", "tags": ["Issue Tracking", "Vendor Advisory"], "url": "https://bugzilla.kernel.org/show_bug.cgi?id=200131"}, {"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/torvalds/linux/commit/bd23a7269834dc7c1f93e83535d16ebc44b75eba"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bd23a7269834dc7c1f93e83535d16ebc44b75eba"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Vendor Advisory"], "url": "https://bugzilla.kernel.org/show_bug.cgi?id=200131"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/torvalds/linux/commit/bd23a7269834dc7c1f93e83535d16ebc44b75eba"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-362"}], "source": "nvd@nist.gov", "type": "Primary"}]}