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"RHBZ#2346112", "tags": ["issue-tracking", "x_refsource_REDHAT"]}], "workarounds": [{"lang": "en", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}], "descriptions": [{"lang": "en", "value": "A flaw was found in grub2. During the network boot process, when trying to search for the configuration file, grub copies data from a user controlled environment variable into an internal buffer using the grub_strcpy() function. During this step, it fails to consider the environment variable length when allocating the internal buffer, resulting in an out-of-bounds write. 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{"cveTags": [], "descriptions": [{"lang": "en", "value": "A flaw was found in grub2. During the network boot process, when trying to search for the configuration file, grub copies data from a user controlled environment variable into an internal buffer using the grub_strcpy() function. During this step, it fails to consider the environment variable length when allocating the internal buffer, resulting in an out-of-bounds write. If correctly exploited, this issue may result in remote code execution through the same network segment grub is searching for the boot information, which can be used to by-pass secure boot protections."}, {"lang": "es", "value": "Se encontr\u00f3 una falla en grub2. Durante el proceso de arranque de red, al intentar buscar el archivo de configuraci\u00f3n, grub copia datos de una variable de entorno controlada por el usuario en un b\u00fafer interno mediante la funci\u00f3n grub_strcpy(). Durante este paso, no tiene en cuenta la longitud de la variable de entorno al asignar el b\u00fafer interno, lo que da como resultado una escritura fuera de los l\u00edmites. Si se explota correctamente, este problema puede dar como resultado la ejecuci\u00f3n de c\u00f3digo remoto a trav\u00e9s del mismo segmento de red en el que grub est\u00e1 buscando la informaci\u00f3n de arranque, que se puede utilizar para eludir las protecciones de arranque seguro."}], "id": "CVE-2025-0624", "lastModified": "2025-04-10T22:15:17.233", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.6, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 6.0, "source": "secalert@redhat.com", "type": "Secondary"}]}, "published": "2025-02-19T19:15:15.120", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2025:2521"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2025:2653"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2025:2655"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2025:2675"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2025:2784"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2025:2799"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2025:2867"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2025:2869"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2025:3297"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2025:3301"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2025:3367"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2025:3396"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2025:3573"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2025:3577"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2025-0624"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2346112"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

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During the network boot process, when trying to search for the configuration file, grub copies data from a user controlled environment variable into an internal buffer using the grub_strcpy() function. During this step, it fails to consider the environment variable length when allocating the internal buffer, resulting in an out-of-bounds write. If correctly exploited, this issue may result in remote code execution through the same network segment grub is searching for the boot information, which can be used to by-pass secure boot protections.", "A flaw was found in grub2. During the network boot process, when trying to search for the configuration file, grub copies data from a user controlled environment variable into an internal buffer using the grub_strcpy() function. During this step, it fails to consider the environment variable length when allocating the internal buffer, resulting in an out-of-bounds write. If correctly exploited, this issue may result in remote code execution through the same network segment grub is searching for the boot information, which can be used to by-pass secure boot protections."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2025-0624", "public_date": "2025-02-18T18:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-0624\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-0624"], "statement": "Red Hat Product Security team has rated this vulnerability as Important, as an attacker that has access to the same network segment is able to exploit it once netboot is enabled in grub2.", "threat_severity": "Important"}