CVE-2024-36968

{"id": "CVE-2024-36968", "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 4.0, "exploitabilityScore": 2.0}]}, "published": "2024-06-08T13:15:58.093", "references": [{"url": "https://git.kernel.org/stable/c/4d3dbaa252257d20611c3647290e6171f1bbd6c8", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a5b862c6a221459d54e494e88965b48dcfa6cc44", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ad3f7986c5a0f82b8b66a0afe1cc1f5421e1d674", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/d2b2f7d3936dc5990549bc36ab7ac7ac37f22c30", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/dfece2b4e3759759b2bdfac2cd6d0ee9fbf055f3", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/4d3dbaa252257d20611c3647290e6171f1bbd6c8", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/a5b862c6a221459d54e494e88965b48dcfa6cc44", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/ad3f7986c5a0f82b8b66a0afe1cc1f5421e1d674", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/d2b2f7d3936dc5990549bc36ab7ac7ac37f22c30", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/dfece2b4e3759759b2bdfac2cd6d0ee9fbf055f3", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-190"}, {"lang": "en", "value": "CWE-369"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix div-by-zero in l2cap_le_flowctl_init()\n\nl2cap_le_flowctl_init() can cause both div-by-zero and an integer\noverflow since hdev->le_mtu may not fall in the valid range.\n\nMove MTU from hci_dev to hci_conn to validate MTU and stop the connection\nprocess earlier if MTU is invalid.\nAlso, add a missing validation in read_buffer_size() and make it return\nan error value if the validation fails.\nNow hci_conn_add() returns ERR_PTR() as it can fail due to the both a\nkzalloc failure and invalid MTU value.\n\ndivide error: 0000 [#1] PREEMPT SMP KASAN NOPTI\nCPU: 0 PID: 67 Comm: kworker/u5:0 Tainted: G W 6.9.0-rc5+ #20\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\nWorkqueue: hci0 hci_rx_work\nRIP: 0010:l2cap_le_flowctl_init+0x19e/0x3f0 net/bluetooth/l2cap_core.c:547\nCode: e8 17 17 0c 00 66 41 89 9f 84 00 00 00 bf 01 00 00 00 41 b8 02 00 00 00 4c\n89 fe 4c 89 e2 89 d9 e8 27 17 0c 00 44 89 f0 31 d2 <66> f7 f3 89 c3 ff c3 4d 8d\nb7 88 00 00 00 4c 89 f0 48 c1 e8 03 42\nRSP: 0018:ffff88810bc0f858 EFLAGS: 00010246\nRAX: 00000000000002a0 RBX: 0000000000000000 RCX: dffffc0000000000\nRDX: 0000000000000000 RSI: ffff88810bc0f7c0 RDI: ffffc90002dcb66f\nRBP: ffff88810bc0f880 R08: aa69db2dda70ff01 R09: 0000ffaaaaaaaaaa\nR10: 0084000000ffaaaa R11: 0000000000000000 R12: ffff88810d65a084\nR13: dffffc0000000000 R14: 00000000000002a0 R15: ffff88810d65a000\nFS: 0000000000000000(0000) GS:ffff88811ac00000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000020000100 CR3: 0000000103268003 CR4: 0000000000770ef0\nPKRU: 55555554\nCall Trace:\n <TASK>\n l2cap_le_connect_req net/bluetooth/l2cap_core.c:4902 [inline]\n l2cap_le_sig_cmd net/bluetooth/l2cap_core.c:5420 [inline]\n l2cap_le_sig_channel net/bluetooth/l2cap_core.c:5486 [inline]\n l2cap_recv_frame+0xe59d/0x11710 net/bluetooth/l2cap_core.c:6809\n l2cap_recv_acldata+0x544/0x10a0 net/bluetooth/l2cap_core.c:7506\n hci_acldata_packet net/bluetooth/hci_core.c:3939 [inline]\n hci_rx_work+0x5e5/0xb20 net/bluetooth/hci_core.c:4176\n process_one_work kernel/workqueue.c:3254 [inline]\n process_scheduled_works+0x90f/0x1530 kernel/workqueue.c:3335\n worker_thread+0x926/0xe70 kernel/workqueue.c:3416\n kthread+0x2e3/0x380 kernel/kthread.c:388\n ret_from_fork+0x5c/0x90 arch/x86/kernel/process.c:147\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244\n </TASK>\nModules linked in:\n---[ end trace 0000000000000000 ]---"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: Bluetooth: L2CAP: corrige div-by-zero en l2cap_le_flowctl_init() l2cap_le_flowctl_init() puede causar tanto div-by-zero como un desbordamiento de enteros ya que hdev-&gt;le_mtu puede no caer el rango v\u00e1lido. Mueva MTU de hci_dev a hci_conn para validar MTU y detener el proceso de conexi\u00f3n antes si MTU no es v\u00e1lido. Adem\u00e1s, agregue una validaci\u00f3n faltante en read_buffer_size() y haga que devuelva un valor de error si la validaci\u00f3n falla. Ahora hci_conn_add() devuelve ERR_PTR() ya que puede fallar debido a una falla de kzalloc y un valor de MTU no v\u00e1lido. error de divisi\u00f3n: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 PID: 67 Comm: kworker/u5:0 Tainted: GW 6.9.0-rc5+ #20 Nombre de hardware: PC est\u00e1ndar QEMU (i440FX + PIIX, 1996), BIOS 1.15.0-1 01/04/2014 Cola de trabajo: hci0 hci_rx_work RIP: 0010:l2cap_le_flowctl_init+0x19e/0x3f0 net/bluetooth/l2cap_core.c:547 C\u00f3digo: e8 17 17 0c 00 66 41 89 9f 84 00 00 novio 01 00 00 00 41 b8 02 00 00 00 4c 89 fe 4c 89 e2 89 d9 e8 27 17 0c 00 44 89 f0 31 d2 &lt;66&gt; f7 f3 89 c3 ff c3 4d 8d b7 88 00 00 00 4c 89 f0 48 c1 e8 03 42 RSP: 0018:ffff88810bc0f858 EFLAGS: 00010246 RAX: 00000000000002a0 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 810bc0f7c0 RDI: ffffc90002dcb66f RBP: ffff88810bc0f880 R08: aa69db2dda70ff01 R09: 0000ffaaaaaaaaaa R10: 0084000000ffaaaa R11: 0000000000000000 R12 : ffff88810d65a084 R13: dffffc0000000000 R14: 00000000000002a0 R15: ffff88810d65a000 FS: 0000000000000000(0000) GS:ffff88811ac00000(0000) knlGS:00000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 50033 CR2: 0000000020000100 CR3: 0000000103268003 CR4: 0000000000770ef0 PKRU: 55555554 Seguimiento de llamadas: l2cap_le_connect_req net /bluetooth/l2cap_core.c:4902 [en l\u00ednea] l2cap_le_sig_cmd net/bluetooth/l2cap_core.c:5420 [en l\u00ednea] l2cap_le_sig_channel net/bluetooth/l2cap_core.c:5486 [en l\u00ednea] l2cap_recv_frame+0xe59d/0x11710 net/bluetooth/l2cap_core.c: 6809 l2cap_recv_acldata+0x544/0x10a0 net/bluetooth/l2cap_core.c:7506 hci_acldata_packet net/bluetooth/hci_core.c:3939 [en l\u00ednea] hci_rx_work+0x5e5/0xb20 net/bluetooth/hci_core.c:4176 Process_one_work kernel/workqueue.c: 3254 [en l\u00ednea] Process_scheduled_works+0x90f/0x1530 kernel/workqueue.c:3335 trabajador_thread+0x926/0xe70 kernel/workqueue.c:3416 kthread+0x2e3/0x380 kernel/kthread.c:388 ret_from_fork+0x5c/0x90 arch/x86/kernel/ Process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 M\u00f3dulos vinculados en: ---[ end trace 0000000000000000 ]---"}], "lastModified": "2024-11-21T09:22:56.013", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "503F0681-1131-42FA-98C3-26C06727BBCC", "versionEndExcluding": "6.6.32", "versionStartIncluding": "2.6.39"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3B75CBAF-FD3C-40AE-85BB-0525E142C4C8", "versionEndExcluding": "6.8.11", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "197A592B-2A2B-4A2F-8856-22638007413E", "versionEndExcluding": "6.9.2", "versionStartIncluding": "6.9"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}