CVE-2022-48876

{"id": "CVE-2022-48876", "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": "2024-08-21T07:15:04.500", "references": [{"url": "https://git.kernel.org/stable/c/a57c981d9f24d2bd89eaa76dc477e8ca252e22e8", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e66b7920aa5ac5b1a1997a454004ba9246a3c005", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix initialization of rx->link and rx->link_sta\n\nThere are some codepaths that do not initialize rx->link_sta properly. This\ncauses a crash in places which assume that rx->link_sta is valid if rx->sta\nis valid.\nOne known instance is triggered by __ieee80211_rx_h_amsdu being called from\nfast-rx. It results in a crash like this one:\n\n BUG: kernel NULL pointer dereference, address: 00000000000000a8\n #PF: supervisor write access in kernel mode\n #PF: error_code(0x0002) - not-present page PGD 0 P4D 0\n Oops: 0002 [#1] PREEMPT SMP PTI\n CPU: 1 PID: 506 Comm: mt76-usb-rx phy Tainted: G E 6.1.0-debian64x+1.7 #3\n Hardware name: ZOTAC ZBOX-ID92/ZBOX-IQ01/ZBOX-ID92/ZBOX-IQ01, BIOS B220P007 05/21/2014\n RIP: 0010:ieee80211_deliver_skb+0x62/0x1f0 [mac80211]\n Code: 00 48 89 04 24 e8 9e a7 c3 df 89 c0 48 03 1c c5 a0 ea 39 a1 4c 01 6b 08 48 ff 03 48\n 83 7d 28 00 74 11 48 8b 45 30 48 63 55 44 <48> 83 84 d0 a8 00 00 00 01 41 8b 86 c0\n 11 00 00 8d 50 fd 83 fa 01\n RSP: 0018:ffff999040803b10 EFLAGS: 00010286\n RAX: 0000000000000000 RBX: ffffb9903f496480 RCX: 0000000000000000\n RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000\n RBP: ffff999040803ce0 R08: 0000000000000000 R09: 0000000000000000\n R10: 0000000000000000 R11: 0000000000000000 R12: ffff8d21828ac900\n R13: 000000000000004a R14: ffff8d2198ed89c0 R15: ffff8d2198ed8000\n FS: 0000000000000000(0000) GS:ffff8d24afe80000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00000000000000a8 CR3: 0000000429810002 CR4: 00000000001706e0\n Call Trace:\n <TASK>\n __ieee80211_rx_h_amsdu+0x1b5/0x240 [mac80211]\n ? ieee80211_prepare_and_rx_handle+0xcdd/0x1320 [mac80211]\n ? __local_bh_enable_ip+0x3b/0xa0\n ieee80211_prepare_and_rx_handle+0xcdd/0x1320 [mac80211]\n ? prepare_transfer+0x109/0x1a0 [xhci_hcd]\n ieee80211_rx_list+0xa80/0xda0 [mac80211]\n mt76_rx_complete+0x207/0x2e0 [mt76]\n mt76_rx_poll_complete+0x357/0x5a0 [mt76]\n mt76u_rx_worker+0x4f5/0x600 [mt76_usb]\n ? mt76_get_min_avg_rssi+0x140/0x140 [mt76]\n __mt76_worker_fn+0x50/0x80 [mt76]\n kthread+0xed/0x120\n ? kthread_complete_and_exit+0x20/0x20\n ret_from_fork+0x22/0x30\n\nSince the initialization of rx->link and rx->link_sta is rather convoluted\nand duplicated in many places, clean it up by using a helper function to\nset it.\n\n[remove unnecessary rx->sta->sta.mlo check]"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: mac80211: corrige la inicializaci\u00f3n de rx-&gt;link y rx-&gt;link_sta Hay algunas rutas de c\u00f3digo que no inicializan rx-&gt;link_sta correctamente. Esto provoca un bloqueo en lugares que asumen que rx-&gt;link_sta es v\u00e1lido si rx-&gt;sta es v\u00e1lido. Una instancia conocida se activa cuando se llama a __ieee80211_rx_h_amsdu desde fast-rx. Resulta en un bloqueo como este: ERROR: desreferencia del puntero NULL del kernel, direcci\u00f3n: 00000000000000a8 #PF: acceso de escritura del supervisor en modo kernel #PF: c\u00f3digo_error(0x0002) - p\u00e1gina no presente PGD 0 P4D 0 Ups: 0002 [#1 ] PREEMPT SMP PTI CPU: 1 PID: 506 Comm: mt76-usb-rx phy Contaminado: GE 6.1.0-debian64x+1.7 #3 Nombre del hardware: ZOTAC ZBOX-ID92/ZBOX-IQ01/ZBOX-ID92/ZBOX-IQ01, BIOS B220P007 21/05/2014 RIP: 0010:ieee80211_deliver_skb+0x62/0x1f0 [mac80211] C\u00f3digo: 00 48 89 04 24 e8 9e a7 c3 df 89 c0 48 03 1c c5 a0 ea 39 a1 4c 01 08 48 y siguientes 03 48 83 7d 28 00 74 11 48 8b 45 30 48 63 55 44 &lt;48&gt; 83 84 d0 a8 00 00 00 01 41 8b 86 c0 11 00 00 8d 50 fd 83 fa 01 RSP:ffff999040803b10 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffffb9903f496480 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000000 RBP: ffff999040803ce0 R08: 00000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8d21828ac900 R13: 000000000000004a R14: 98ed89c0 R15: ffff8d2198ed8000 FS: 0000000000000000(0000) GS:ffff8d24afe80000( 0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000000000a8 CR3: 0000000429810002 CR4: 00000000001 706e0 Seguimiento de llamadas: __ieee80211_rx_h_amsdu+0x1b5/0x240 [mac80211] ? ieee80211_prepare_and_rx_handle+0xcdd/0x1320 [mac80211]? __local_bh_enable_ip+0x3b/0xa0 ieee80211_prepare_and_rx_handle+0xcdd/0x1320 [mac80211]? prepare_transfer+0x109/0x1a0 [xhci_hcd] ieee80211_rx_list+0xa80/0xda0 [mac80211] mt76_rx_complete+0x207/0x2e0 [mt76] mt76_rx_poll_complete+0x357/0x5a0 [mt76u_rx_worker] +0x4f5/0x600 [mt76_usb] ? mt76_get_min_avg_rssi+0x140/0x140 [mt76] __mt76_worker_fn+0x50/0x80 [mt76] kthread+0xed/0x120 ? kthread_complete_and_exit+0x20/0x20 ret_from_fork+0x22/0x30 Dado que la inicializaci\u00f3n de rx-&gt;link y rx-&gt;link_sta es bastante complicada y duplicada en muchos lugares, l\u00edmpiela usando una funci\u00f3n auxiliar para configurarla. [eliminar comprobaci\u00f3n innecesaria de rx-&gt;sta-&gt;sta.mlo]"}], "lastModified": "2024-08-29T02:41:34.627", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0EF71645-1ABD-4584-8FEC-AF3D155E1F5B", "versionEndExcluding": "6.1.8", "versionStartIncluding": "6.1"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}