CVE-2024-50161

{"id": "CVE-2024-50161", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2024-11-07T10:15:07.480", "references": [{"url": "https://git.kernel.org/stable/c/6f957d972feee9b385ea3ae6530310a84e55ba71", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/797d73ee232dd1833dec4824bc53a22032e97c1c", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-129"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Check the remaining info_cnt before repeating btf fields\n\nWhen trying to repeat the btf fields for array of nested struct, it\ndoesn't check the remaining info_cnt. The following splat will be\nreported when the value of ret * nelems is greater than BTF_FIELDS_MAX:\n\n ------------[ cut here ]------------\n UBSAN: array-index-out-of-bounds in ../kernel/bpf/btf.c:3951:49\n index 11 is out of range for type 'btf_field_info [11]'\n CPU: 6 UID: 0 PID: 411 Comm: test_progs ...... 6.11.0-rc4+ #1\n Tainted: [O]=OOT_MODULE\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ...\n Call Trace:\n <TASK>\n dump_stack_lvl+0x57/0x70\n dump_stack+0x10/0x20\n ubsan_epilogue+0x9/0x40\n __ubsan_handle_out_of_bounds+0x6f/0x80\n ? kallsyms_lookup_name+0x48/0xb0\n btf_parse_fields+0x992/0xce0\n map_create+0x591/0x770\n __sys_bpf+0x229/0x2410\n __x64_sys_bpf+0x1f/0x30\n x64_sys_call+0x199/0x9f0\n do_syscall_64+0x3b/0xc0\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\n RIP: 0033:0x7fea56f2cc5d\n ......\n </TASK>\n ---[ end trace ]---\n\nFix it by checking the remaining info_cnt in btf_repeat_fields() before\nrepeating the btf fields."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf: Verificar el info_cnt restante antes de repetir los campos btf Al intentar repetir los campos btf para una matriz de estructuras anidadas, no verifica el info_cnt restante. Se informar\u00e1 el siguiente error cuando el valor de ret * nelems sea mayor que BTF_FIELDS_MAX: ------------[ cortar aqu\u00ed ]------------ UBSAN: array-index-out-of-bounds en ../kernel/bpf/btf.c:3951:49 el \u00edndice 11 est\u00e1 fuera de rango para el tipo 'btf_field_info [11]' CPU: 6 UID: 0 PID: 411 Comm: test_progs ...... 6.11.0-rc4+ #1 Tainted: [O]=OOT_MODULE Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ... Seguimiento de llamadas: dump_stack_lvl+0x57/0x70 dump_stack+0x10/0x20 ubsan_epilogue+0x9/0x40 __ubsan_handle_fuera_de_l\u00edmites+0x6f/0x80 ? kallsyms_lookup_name+0x48/0xb0 btf_parse_fields+0x992/0xce0 map_create+0x591/0x770 __sys_bpf+0x229/0x2410 __x64_sys_bpf+0x1f/0x30 x64_sys_call+0x199/0x9f0 do_syscall_64+0x3b/0xc0 entry_SYSCALL_64_after_hwframe+0x4b/0x53 RIP: 0033:0x7fea56f2cc5d ...... ---[ fin del seguimiento ]--- Arr\u00e9glelo comprobando el info_cnt restante en btf_repeat_fields() antes de repetir los campos btf."}], "lastModified": "2024-11-13T16:36:57.413", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "35973F0F-C32F-4D88-B0FE-C75F65A0002B", "versionEndExcluding": "6.11.6", "versionStartIncluding": "6.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7F361E1D-580F-4A2D-A509-7615F73167A1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "925478D0-3E3D-4E6F-ACD5-09F28D5DF82C"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3C95E234-D335-4B6C-96BF-E2CEBD8654ED"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}