CVE-2025-0684

{"id": "CVE-2025-0684", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "secalert@redhat.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.4, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 0.5}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.4, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 0.5}]}, "published": "2025-03-03T18:15:30.537", "references": [{"url": "https://access.redhat.com/security/cve/CVE-2025-0684", "tags": ["Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2346119", "tags": ["Issue Tracking"], "source": "secalert@redhat.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "secalert@redhat.com", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "A flaw was found in grub2. When performing a symlink lookup from a reiserfs filesystem, grub's reiserfs fs module uses user-controlled parameters from the filesystem geometry to determine the internal buffer size, however, it improperly checks for integer overflows. A maliciouly crafted filesystem may lead some of those buffer size calculations to overflow, causing it to perform a grub_malloc() operation with a smaller size than expected. As a result, the grub_reiserfs_read_symlink() will call grub_reiserfs_read_real() with a overflown length parameter, leading to a heap based out-of-bounds write during data reading. This flaw may be leveraged to corrupt grub's internal critical data and can result in arbitrary code execution, by-passing secure boot protections."}, {"lang": "es", "value": "Se encontr\u00f3 una falla en grub2. Al realizar una b\u00fasqueda de enlace simb\u00f3lico desde un sistema de archivos reiserfs, el m\u00f3dulo de sistema de archivos reiserfs de grub utiliza par\u00e1metros controlados por el usuario de la geometr\u00eda del sistema de archivos para determinar el tama\u00f1o del b\u00fafer interno; sin embargo, verifica incorrectamente si hay desbordamientos de enteros. Un sistema de archivos manipulados con fines malintencionados puede provocar que algunos de esos c\u00e1lculos de tama\u00f1o de b\u00fafer se desborden, lo que hace que realice una operaci\u00f3n grub_malloc() con un tama\u00f1o menor al esperado. Como resultado, grub_reiserfs_read_symlink() llamar\u00e1 a grub_reiserfs_read_real() con un par\u00e1metro de longitud desbordado, lo que lleva a una escritura fuera de los l\u00edmites basada en el mont\u00f3n durante la lectura de datos. Esta falla puede aprovecharse para corromper los datos cr\u00edticos internos de grub y puede resultar en la ejecuci\u00f3n de c\u00f3digo arbitrario, eludiendo las protecciones de arranque seguro."}], "lastModified": "2025-07-28T17:22:10.597", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6ECC2401-511C-4A2E-878F-C7053FA3ABB1", "versionEndIncluding": "2.12"}], "operator": "OR"}]}], "sourceIdentifier": "secalert@redhat.com"}