cve-2023-52449
Vulnerability from cvelistv5
Published
2024-02-22 16:21
Modified
2024-08-02 22:55
Severity
Summary
mtd: Fix gluebi NULL pointer dereference caused by ftl notifier
References
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: Fix gluebi NULL pointer dereference caused by ftl notifier\n\nIf both ftl.ko and gluebi.ko are loaded, the notifier of ftl\ntriggers NULL pointer dereference when trying to access\n\u2018gluebi-\u003edesc\u2019 in gluebi_read().\n\nubi_gluebi_init\n ubi_register_volume_notifier\n ubi_enumerate_volumes\n ubi_notify_all\n gluebi_notify nb-\u003enotifier_call()\n gluebi_create\n mtd_device_register\n mtd_device_parse_register\n add_mtd_device\n blktrans_notify_add not-\u003eadd()\n ftl_add_mtd tr-\u003eadd_mtd()\n scan_header\n mtd_read\n mtd_read_oob\n mtd_read_oob_std\n gluebi_read mtd-\u003eread()\n gluebi-\u003edesc - NULL\n\nDetailed reproduction information available at the Link [1],\n\nIn the normal case, obtain gluebi-\u003edesc in the gluebi_get_device(),\nand access gluebi-\u003edesc in the gluebi_read(). However,\ngluebi_get_device() is not executed in advance in the\nftl_add_mtd() process, which leads to NULL pointer dereference.\n\nThe solution for the gluebi module is to run jffs2 on the UBI\nvolume without considering working with ftl or mtdblock [2].\nTherefore, this problem can be avoided by preventing gluebi from\ncreating the mtdblock device after creating mtd partition of the\ntype MTD_UBIVOLUME."
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"nvd": "{\"cve\":{\"id\":\"CVE-2023-52449\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-02-22T17:15:08.677\",\"lastModified\":\"2024-06-27T12:15:14.537\",\"vulnStatus\":\"Modified\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmtd: Fix gluebi NULL pointer dereference caused by ftl notifier\\n\\nIf both ftl.ko and gluebi.ko are loaded, the notifier of ftl\\ntriggers NULL pointer dereference when trying to access\\n\u2018gluebi-\u003edesc\u2019 in gluebi_read().\\n\\nubi_gluebi_init\\n ubi_register_volume_notifier\\n ubi_enumerate_volumes\\n ubi_notify_all\\n gluebi_notify nb-\u003enotifier_call()\\n gluebi_create\\n mtd_device_register\\n mtd_device_parse_register\\n add_mtd_device\\n blktrans_notify_add not-\u003eadd()\\n ftl_add_mtd tr-\u003eadd_mtd()\\n scan_header\\n mtd_read\\n mtd_read_oob\\n mtd_read_oob_std\\n gluebi_read mtd-\u003eread()\\n gluebi-\u003edesc - NULL\\n\\nDetailed reproduction information available at the Link [1],\\n\\nIn the normal case, obtain gluebi-\u003edesc in the gluebi_get_device(),\\nand access gluebi-\u003edesc in the gluebi_read(). However,\\ngluebi_get_device() is not executed in advance in the\\nftl_add_mtd() process, which leads to NULL pointer dereference.\\n\\nThe solution for the gluebi module is to run jffs2 on the UBI\\nvolume without considering working with ftl or mtdblock [2].\\nTherefore, this problem can be avoided by preventing gluebi from\\ncreating the mtdblock device after creating mtd partition of the\\ntype MTD_UBIVOLUME.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mtd: corrige la desreferencia del puntero NULL de Gluebi causada por el notificador ftl. Si se cargan tanto ftl.ko como pegamentobi.ko, el notificador de ftl activa la desreferencia del puntero NULL al intentar acceder a \u0027gluebi-. \u0026gt;desc\u0027 en pegamentobi_read(). ubi_gluebi_init ubi_register_volume_notifier ubi_enumerate_volumes ubi_notify_all pegamentobi_notify nb-\u0026gt;notifier_call() pegamentobi_create mtd_device_register mtd_device_parse_register add_mtd_device blktrans_notify_add not-\u0026gt;add() ftl_add_mtd tr-\u0026gt;add_mtd() scan_header mtd_read mtd_read_oob mtd_read_oob_std pegamentobi_read mtd-\u0026gt;read() pegamentobi-\u0026gt;desc - NULL Informaci\u00f3n detallada de reproducci\u00f3n disponible en el enlace [1], en el caso normal, obtenga pegamentobi-\u0026gt;desc en pegamentobi_get_device() y acceda a pegamentobi-\u0026gt;desc en pegamentobi_read(). Sin embargo, pegamentobi_get_device() no se ejecuta de antemano en el proceso ftl_add_mtd(), lo que conduce a la desreferencia del puntero NULL. La soluci\u00f3n para el m\u00f3dulo pegamentobi es ejecutar jffs2 en el volumen UBI sin considerar trabajar con ftl o mtdblock [2]. 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