CVE-2021-47288

{"id": "CVE-2021-47288", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 1.8}]}, "published": "2024-05-21T15:15:16.867", "references": [{"url": "https://git.kernel.org/stable/c/4487b968e5eacd02c493303dc2b61150bb7fe4b2", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/8d4abca95ecc82fc8c41912fa0085281f19cc29f", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b9a178f189bb6d75293573e181928735f5e3e070", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/c6ddeb63dd543b5474b0217c4e47538b7ffd7686", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e617fa62f6cf859a7b042cdd6c73af905ff8fca3", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e818f2ff648581a6c553ae2bebc5dcef9a8bb90c", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e991457afdcb5f4dbc5bc9d79eaf775be33e7092", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ec731c6ef564ee6fc101fc5d73e3a3a953d09a00", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/4487b968e5eacd02c493303dc2b61150bb7fe4b2", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/8d4abca95ecc82fc8c41912fa0085281f19cc29f", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/b9a178f189bb6d75293573e181928735f5e3e070", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/c6ddeb63dd543b5474b0217c4e47538b7ffd7686", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/e617fa62f6cf859a7b042cdd6c73af905ff8fca3", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/e818f2ff648581a6c553ae2bebc5dcef9a8bb90c", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/e991457afdcb5f4dbc5bc9d79eaf775be33e7092", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/ec731c6ef564ee6fc101fc5d73e3a3a953d09a00", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-125"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: ngene: Fix out-of-bounds bug in ngene_command_config_free_buf()\n\nFix an 11-year old bug in ngene_command_config_free_buf() while\naddressing the following warnings caught with -Warray-bounds:\n\narch/alpha/include/asm/string.h:22:16: warning: '__builtin_memcpy' offset [12, 16] from the object at 'com' is out of the bounds of referenced subobject 'config' with type 'unsigned char' at offset 10 [-Warray-bounds]\narch/x86/include/asm/string_32.h:182:25: warning: '__builtin_memcpy' offset [12, 16] from the object at 'com' is out of the bounds of referenced subobject 'config' with type 'unsigned char' at offset 10 [-Warray-bounds]\n\nThe problem is that the original code is trying to copy 6 bytes of\ndata into a one-byte size member _config_ of the wrong structue\nFW_CONFIGURE_BUFFERS, in a single call to memcpy(). This causes a\nlegitimate compiler warning because memcpy() overruns the length\nof &com.cmd.ConfigureBuffers.config. It seems that the right\nstructure is FW_CONFIGURE_FREE_BUFFERS, instead, because it contains\n6 more members apart from the header _hdr_. Also, the name of\nthe function ngene_command_config_free_buf() suggests that the actual\nintention is to ConfigureFreeBuffers, instead of ConfigureBuffers\n(which takes place in the function ngene_command_config_buf(), above).\n\nFix this by enclosing those 6 members of struct FW_CONFIGURE_FREE_BUFFERS\ninto new struct config, and use &com.cmd.ConfigureFreeBuffers.config as\nthe destination address, instead of &com.cmd.ConfigureBuffers.config,\nwhen calling memcpy().\n\nThis also helps with the ongoing efforts to globally enable\n-Warray-bounds and get us closer to being able to tighten the\nFORTIFY_SOURCE routines on memcpy()."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: medios: ngene: corrige un error fuera de los l\u00edmites en ngene_command_config_free_buf(). Corrige un error de hace 11 a\u00f1os en ngene_command_config_free_buf() mientras se solucionan las siguientes advertencias detectadas con -Warray-bounds: arch/alpha/include/asm/string.h:22:16: advertencia: el desplazamiento '__builtin_memcpy' [12, 16] del objeto en 'com' est\u00e1 fuera de los l\u00edmites del subobjeto referenciado 'config' con tipo 'car\u00e1cter sin firmar ' en el desplazamiento 10 [-Warray-bounds] arch/x86/include/asm/string_32.h:182:25: advertencia: el desplazamiento '__builtin_memcpy' [12, 16] del objeto en 'com' est\u00e1 fuera de los l\u00edmites de subobjeto referenciado 'config' con tipo 'unsigned char' en el desplazamiento 10 [-Warray-bounds] El problema es que el c\u00f3digo original est\u00e1 intentando copiar 6 bytes de datos en un miembro de tama\u00f1o de un byte _config_ de la estructura incorrecta FW_CONFIGURE_BUFFERS, en una sola llamada a memcpy(). Esto provoca una advertencia leg\u00edtima del compilador porque memcpy() sobrepasa la longitud de &com.cmd.ConfigureBuffers.config. Parece que la estructura correcta es FW_CONFIGURE_FREE_BUFFERS, porque contiene 6 miembros m\u00e1s adem\u00e1s del encabezado _hdr_. Adem\u00e1s, el nombre de la funci\u00f3n ngene_command_config_free_buf() sugiere que la intenci\u00f3n real es ConfigureFreeBuffers, en lugar de ConfigureBuffers (que tiene lugar en la funci\u00f3n ngene_command_config_buf(), arriba). Solucione este problema encerrando esos 6 miembros de la estructura FW_CONFIGURE_FREE_BUFFERS en una nueva configuraci\u00f3n de estructura y use &com.cmd.ConfigureFreeBuffers.config como direcci\u00f3n de destino, en lugar de &com.cmd.ConfigureBuffers.config, al llamar a memcpy(). Esto tambi\u00e9n ayuda con los esfuerzos continuos para habilitar globalmente -Warray-bounds y acercarnos a poder ajustar las rutinas FORTIFY_SOURCE en memcpy()."}], "lastModified": "2024-12-23T16:45:23.720", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7D45A9E6-B9E0-4304-BC21-EA9A34A2DB7C", "versionEndExcluding": "4.4.277", "versionStartIncluding": "2.6.34"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B543C082-5612-489A-A957-B7F2B8822025", "versionEndExcluding": "4.9.277", "versionStartIncluding": "4.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6A796929-CDBE-45AF-BD44-F357F64AFFCA", "versionEndExcluding": "4.14.241", "versionStartIncluding": "4.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D1C5B0E1-06E7-4615-AA17-02585202D86E", "versionEndExcluding": "4.19.199", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E1FCD98C-8886-4844-B7AF-C42731DF9465", "versionEndExcluding": "5.4.136", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1BD5A2EE-859F-40FC-BDAC-167AAE37C870", "versionEndExcluding": "5.10.54", "versionStartIncluding": "5.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "512C22FC-1524-4E6F-9E62-4F4B7B6E0576", "versionEndExcluding": "5.13.6", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.14:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "71268287-21A8-4488-AA4F-23C473153131"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.14:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "23B9E5C6-FAB5-4A02-9E39-27C8787B0991"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}