CVE-2024-50042

{"id": "CVE-2024-50042", "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": "2024-10-21T20:15:17.200", "references": [{"url": "https://git.kernel.org/stable/c/bce9af1b030bf59d51bbabf909a3ef164787e44e", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/cbda6197929418fabf0e45ecf9b7a76360944c70", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "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\nice: Fix increasing MSI-X on VF\n\nIncreasing MSI-X value on a VF leads to invalid memory operations. This\nis caused by not reallocating some arrays.\n\nReproducer:\n modprobe ice\n echo 0 > /sys/bus/pci/devices/$PF_PCI/sriov_drivers_autoprobe\n echo 1 > /sys/bus/pci/devices/$PF_PCI/sriov_numvfs\n echo 17 > /sys/bus/pci/devices/$VF0_PCI/sriov_vf_msix_count\n\nDefault MSI-X is 16, so 17 and above triggers this issue.\n\nKASAN reports:\n\n BUG: KASAN: slab-out-of-bounds in ice_vsi_alloc_ring_stats+0x38d/0x4b0 [ice]\n Read of size 8 at addr ffff8888b937d180 by task bash/28433\n (...)\n\n Call Trace:\n (...)\n ? ice_vsi_alloc_ring_stats+0x38d/0x4b0 [ice]\n kasan_report+0xed/0x120\n ? ice_vsi_alloc_ring_stats+0x38d/0x4b0 [ice]\n ice_vsi_alloc_ring_stats+0x38d/0x4b0 [ice]\n ice_vsi_cfg_def+0x3360/0x4770 [ice]\n ? mutex_unlock+0x83/0xd0\n ? __pfx_ice_vsi_cfg_def+0x10/0x10 [ice]\n ? __pfx_ice_remove_vsi_lkup_fltr+0x10/0x10 [ice]\n ice_vsi_cfg+0x7f/0x3b0 [ice]\n ice_vf_reconfig_vsi+0x114/0x210 [ice]\n ice_sriov_set_msix_vec_count+0x3d0/0x960 [ice]\n sriov_vf_msix_count_store+0x21c/0x300\n (...)\n\n Allocated by task 28201:\n (...)\n ice_vsi_cfg_def+0x1c8e/0x4770 [ice]\n ice_vsi_cfg+0x7f/0x3b0 [ice]\n ice_vsi_setup+0x179/0xa30 [ice]\n ice_sriov_configure+0xcaa/0x1520 [ice]\n sriov_numvfs_store+0x212/0x390\n (...)\n\nTo fix it, use ice_vsi_rebuild() instead of ice_vf_reconfig_vsi(). This\ncauses the required arrays to be reallocated taking the new queue count\ninto account (ice_vsi_realloc_stat_arrays()). Set req_txq and req_rxq\nbefore ice_vsi_rebuild(), so that realloc uses the newly set queue\ncount.\n\nAdditionally, ice_vsi_rebuild() does not remove VSI filters\n(ice_fltr_remove_all()), so ice_vf_init_host_cfg() is no longer\nnecessary."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ice: Fix increasing MSI-X on VF Aumentar el valor de MSI-X en un VF conduce a operaciones de memoria no v\u00e1lidas. Esto se debe a que no se reasignan algunas matrices. Reproductor: modprobe ice echo 0 > /sys/bus/pci/devices/$PF_PCI/sriov_drivers_autoprobe echo 1 > /sys/bus/pci/devices/$PF_PCI/sriov_numvfs echo 17 > /sys/bus/pci/devices/$VF0_PCI/sriov_vf_msix_count El MSI-X predeterminado es 16, por lo que 17 y superior desencadenan este problema. KASAN informa: ERROR: KASAN: slab fuera de los l\u00edmites en ice_vsi_alloc_ring_stats+0x38d/0x4b0 [ice] Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff8888b937d180 por la tarea bash/28433 (...) Seguimiento de llamadas: (...) ? ice_vsi_alloc_ring_stats+0x38d/0x4b0 [ice] kasan_report+0xed/0x120 ? ice_vsi_alloc_ring_stats+0x38d/0x4b0 [ice] ice_vsi_alloc_ring_stats+0x38d/0x4b0 [ice] ice_vsi_alloc_ring_stats+0x38d/0x4b0 [ice] ice_vsi_cfg_def+0x3360/0x4770 [ice] ? mutex_unlock+0x83/0xd0 ? __pfx_ice_vsi_cfg_def+0x10/0x10 [hielo] ? __pfx_ice_remove_vsi_lkup_fltr+0x10/0x10 [hielo] ice_vsi_cfg+0x7f/0x3b0 [hielo] ice_vf_reconfig_vsi+0x114/0x210 [hielo] ice_sriov_set_msix_vec_count+0x3d0/0x960 [hielo] sriov_vf_msix_count_store+0x21c/0x300 (...) Asignado por la tarea 28201: (...) ice_vsi_cfg_def+0x1c8e/0x4770 [hielo] ice_vsi_cfg+0x7f/0x3b0 [hielo] ice_vsi_setup+0x179/0xa30 [hielo] ice_sriov_configure+0xcaa/0x1520 [ice] sriov_numvfs_store+0x212/0x390 (...) Para solucionarlo, utilice ice_vsi_rebuild() en lugar de ice_vf_reconfig_vsi(). Esto hace que las matrices requeridas se reasignen teniendo en cuenta el nuevo recuento de colas (ice_vsi_realloc_stat_arrays()). Establezca req_txq y req_rxq antes de ice_vsi_rebuild(), de modo que realloc utilice el nuevo recuento de colas establecido. Adem\u00e1s, ice_vsi_rebuild() no elimina los filtros VSI (ice_fltr_remove_all()), por lo que ice_vf_init_host_cfg() ya no es necesario."}], "lastModified": "2024-11-22T17:21:37.140", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "15130BF0-E913-4EC3-B479-B8FA35896797", "versionEndExcluding": "6.8", "versionStartIncluding": "6.7.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C354E062-80AD-4947-809C-E798BC6AAA39", "versionEndExcluding": "6.11.4", "versionStartIncluding": "6.8"}, {"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"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}