{ "id": "CVE-2023-52477", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2024-02-29T06:15:45.870", "lastModified": "2024-12-09T18:39:35.613", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: hub: Guard against accesses to uninitialized BOS descriptors\n\nMany functions in drivers/usb/core/hub.c and drivers/usb/core/hub.h\naccess fields inside udev->bos without checking if it was allocated and\ninitialized. If usb_get_bos_descriptor() fails for whatever\nreason, udev->bos will be NULL and those accesses will result in a\ncrash:\n\nBUG: kernel NULL pointer dereference, address: 0000000000000018\nPGD 0 P4D 0\nOops: 0000 [#1] PREEMPT SMP NOPTI\nCPU: 5 PID: 17818 Comm: kworker/5:1 Tainted: G W 5.15.108-18910-gab0e1cb584e1 #1 \nHardware name: Google Kindred/Kindred, BIOS Google_Kindred.12672.413.0 02/03/2021\nWorkqueue: usb_hub_wq hub_event\nRIP: 0010:hub_port_reset+0x193/0x788\nCode: 89 f7 e8 20 f7 15 00 48 8b 43 08 80 b8 96 03 00 00 03 75 36 0f b7 88 92 03 00 00 81 f9 10 03 00 00 72 27 48 8b 80 a8 03 00 00 <48> 83 78 18 00 74 19 48 89 df 48 8b 75 b0 ba 02 00 00 00 4c 89 e9\nRSP: 0018:ffffab740c53fcf8 EFLAGS: 00010246\nRAX: 0000000000000000 RBX: ffffa1bc5f678000 RCX: 0000000000000310\nRDX: fffffffffffffdff RSI: 0000000000000286 RDI: ffffa1be9655b840\nRBP: ffffab740c53fd70 R08: 00001b7d5edaa20c R09: ffffffffb005e060\nR10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000\nR13: ffffab740c53fd3e R14: 0000000000000032 R15: 0000000000000000\nFS: 0000000000000000(0000) GS:ffffa1be96540000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000000000018 CR3: 000000022e80c005 CR4: 00000000003706e0\nCall Trace:\nhub_event+0x73f/0x156e\n? hub_activate+0x5b7/0x68f\nprocess_one_work+0x1a2/0x487\nworker_thread+0x11a/0x288\nkthread+0x13a/0x152\n? process_one_work+0x487/0x487\n? kthread_associate_blkcg+0x70/0x70\nret_from_fork+0x1f/0x30\n\nFall back to a default behavior if the BOS descriptor isn't accessible\nand skip all the functionalities that depend on it: LPM support checks,\nSuper Speed capabilitiy checks, U1/U2 states setup." }, { "lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: usb: hub: protege contra accesos a descriptores BOS no inicializados Muchas funciones en drivers/usb/core/hub.c y drivers/usb/core/hub.h acceden a los campos dentro de udev- >bos sin verificar si fue asignado e inicializado. Si usb_get_bos_descriptor() falla por cualquier motivo, udev->bos ser\u00e1 NULL y esos accesos resultar\u00e1n en un bloqueo: ERROR: desreferencia del puntero NULL del kernel, direcci\u00f3n: 0000000000000018 PGD 0 P4D 0 Vaya: 0000 [#1] CPU PREEMPT SMP NOPTI : 5 PID: 17818 Comm: kworker/5:1 Tainted: GW 5.15.108-18910-gab0e1cb584e1 #1 Nombre de hardware: Google Kindred/Kindred, BIOS Google_Kindred.12672.413.0 03/02/2021 Cola de trabajo : usb_hub_wq hub_event RIP: 0010:hub_port_reset+0x193/0x788 C\u00f3digo: 89 f7 e8 20 f7 15 00 48 8b 43 08 80 b8 96 03 00 00 03 75 36 0f b7 88 92 03 00 00 81 f9 10 03 00 00 72 27 48 8b 80 a8 03 00 00 <48> 83 78 18 00 74 19 48 89 df 48 8b 75 b0 ba 02 00 00 00 4c 89 e9 RSP: 0018:ffffab740c53fcf8 EFLAGS: 00010246 RAX: 000000 0000000000 RBX: ffffa1bc5f678000 RCX: 0000000000000310 RDX: ffffffffffffdff RSI: 0000000000000286 RDI: ffffa1be9655b840 RBP: ffffab740c53fd70 R08: 00001b7d5edaa20c R09: ffffffffb005e060 R10: 0000000000000001 R11: 00000000 00000000 R12: 0000000000000000 R13: ffffab740c53fd3e R14: 0000000000000032 R15: 00000000000000000 FS: 0000000000000000(0000) GS:ffffa1be965 40000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000018 CR3: 000000022e80c005 CR4: 00000000003706e0 Seguimiento de llamadas: hub_event+0x73f/0x156e ? hub_activate+0x5b7/0x68f proceso_one_work+0x1a2/0x487 trabajador_thread+0x11a/0x288 kthread+0x13a/0x152 ? proceso_one_work+0x487/0x487? kthread_associate_blkcg+0x70/0x70 ret_from_fork+0x1f/0x30 Vuelva a un comportamiento predeterminado si no se puede acceder al descriptor BOS y omita todas las funcionalidades que dependen de \u00e9l: comprobaciones de compatibilidad con LPM, comprobaciones de capacidad de supervelocidad, configuraci\u00f3n de estados U1/U2." } ], "metrics": { "cvssMetricV31": [ { "source": "nvd@nist.gov", "type": "Primary", "cvssData": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH" }, "exploitabilityScore": 1.8, "impactScore": 3.6 } ] }, "weaknesses": [ { "source": "nvd@nist.gov", "type": "Primary", "description": [ { "lang": "en", "value": "CWE-476" } ] } ], "configurations": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.14.328", "matchCriteriaId": "F9EC0B2A-902B-4169-85CD-C137590CC4B6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "4.19.297", "matchCriteriaId": "02978144-891F-40EF-83B8-59063740AEF6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", 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