CVE-2022-48935

{"id": "CVE-2022-48935", "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": "2024-08-22T04:15:16.877", "references": [{"url": "https://git.kernel.org/stable/c/6069da443bf65f513bb507bb21e2f87cfb1ad0b6", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/88c795491bf45a8c08a0f94c9ca4f13722e51013", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/8ffb8ac3448845f65634889b051bd65e4dee484b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b05a24cc453e3cd51b0c79e3c583b5d495eba1d6", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b4fcc081e527aa2ce12e956912fc47e251f6bd27", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e51f30826bc5384801df98d76109c94953d1df64", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: unregister flowtable hooks on netns exit\n\nUnregister flowtable hooks before they are releases via\nnf_tables_flowtable_destroy() otherwise hook core reports UAF.\n\nBUG: KASAN: use-after-free in nf_hook_entries_grow+0x5a7/0x700 net/netfilter/core.c:142 net/netfilter/core.c:142\nRead of size 4 at addr ffff8880736f7438 by task syz-executor579/3666\n\nCPU: 0 PID: 3666 Comm: syz-executor579 Not tainted 5.16.0-rc5-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\nCall Trace:\n <TASK>\n __dump_stack lib/dump_stack.c:88 [inline]\n __dump_stack lib/dump_stack.c:88 [inline] lib/dump_stack.c:106\n dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106 lib/dump_stack.c:106\n print_address_description+0x65/0x380 mm/kasan/report.c:247 mm/kasan/report.c:247\n __kasan_report mm/kasan/report.c:433 [inline]\n __kasan_report mm/kasan/report.c:433 [inline] mm/kasan/report.c:450\n kasan_report+0x19a/0x1f0 mm/kasan/report.c:450 mm/kasan/report.c:450\n nf_hook_entries_grow+0x5a7/0x700 net/netfilter/core.c:142 net/netfilter/core.c:142\n __nf_register_net_hook+0x27e/0x8d0 net/netfilter/core.c:429 net/netfilter/core.c:429\n nf_register_net_hook+0xaa/0x180 net/netfilter/core.c:571 net/netfilter/core.c:571\n nft_register_flowtable_net_hooks+0x3c5/0x730 net/netfilter/nf_tables_api.c:7232 net/netfilter/nf_tables_api.c:7232\n nf_tables_newflowtable+0x2022/0x2cf0 net/netfilter/nf_tables_api.c:7430 net/netfilter/nf_tables_api.c:7430\n nfnetlink_rcv_batch net/netfilter/nfnetlink.c:513 [inline]\n nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:634 [inline]\n nfnetlink_rcv_batch net/netfilter/nfnetlink.c:513 [inline] net/netfilter/nfnetlink.c:652\n nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:634 [inline] net/netfilter/nfnetlink.c:652\n nfnetlink_rcv+0x10e6/0x2550 net/netfilter/nfnetlink.c:652 net/netfilter/nfnetlink.c:652\n\n__nft_release_hook() calls nft_unregister_flowtable_net_hooks() which\nonly unregisters the hooks, then after RCU grace period, it is\nguaranteed that no packets add new entries to the flowtable (no flow\noffload rules and flowtable hooks are reachable from packet path), so it\nis safe to call nf_flow_table_free() which cleans up the remaining\nentries from the flowtable (both software and hardware) and it unbinds\nthe flow_block."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: nf_tables: anular el registro de los ganchos de la tabla de flujo en la salida de netns. Anular el registro de los ganchos de la tabla de flujo antes de que se publiquen a trav\u00e9s de nf_tables_flowtable_destroy(); de lo contrario, enganche los informes centrales UAF. ERROR: KASAN: use-after-free en nf_hook_entries_grow+0x5a7/0x700 net/netfilter/core.c:142 net/netfilter/core.c:142 Lectura de tama\u00f1o 4 en la direcci\u00f3n ffff8880736f7438 por la tarea syz-executor579/3666 CPU: 0 PID: 3666 Comm: syz-executor579 Not tainted 5.16.0-rc5-syzkaller #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Seguimiento de llamadas: __dump_stack lib/dump_stack.c :88 [en l\u00ednea] __dump_stack lib/dump_stack.c:88 [en l\u00ednea] lib/dump_stack.c:106 dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106 lib/dump_stack.c:106 print_address_description+0x65/0x380 mm/kasan /report.c:247 mm/kasan/report.c:247 __kasan_report mm/kasan/report.c:433 [en l\u00ednea] __kasan_report mm/kasan/report.c:433 [en l\u00ednea] mm/kasan/report.c:450 kasan_report+0x19a/0x1f0 mm/kasan/report.c:450 mm/kasan/report.c:450 nf_hook_entries_grow+0x5a7/0x700 net/netfilter/core.c:142 net/netfilter/core.c:142 __nf_register_net_hook+0x27e/ 0x8d0 net/netfilter/core.c:429 net/netfilter/core.c:429 nf_register_net_hook+0xaa/0x180 net/netfilter/core.c:571 net/netfilter/core.c:571 nft_register_flowtable_net_hooks+0x3c5/0x730 net/netfilter /nf_tables_api.c:7232 net/netfilter/nf_tables_api.c:7232 nf_tables_newflowtable+0x2022/0x2cf0 net/netfilter/nf_tables_api.c:7430 net/netfilter/nf_tables_api.c:7430 nfnetlink_rcv_batch net/netfilter/nfnetlink .c:513 [en l\u00ednea ] nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:634 [en l\u00ednea] nfnetlink_rcv_batch net/netfilter/nfnetlink.c:513 [en l\u00ednea] net/netfilter/nfnetlink.c:652 nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:634 [en l\u00ednea] neto /netfilter/nfnetlink.c:652 nfnetlink_rcv+0x10e6/0x2550 net/netfilter/nfnetlink.c:652 net/netfilter/nfnetlink.c:652 __nft_release_hook() llama a nft_unregister_flowtable_net_hooks() que solo cancela el registro de los ganchos, luego, despu\u00e9s del per\u00edodo de gracia de RCU, se garantiza que ning\u00fan paquete agregue nuevas entradas a la tabla de flujo (no se puede acceder a reglas de descarga de flujo ni a enlaces de tabla de flujo desde la ruta del paquete), por lo que es seguro llamar a nf_flow_table_free() que limpia las entradas restantes de la tabla de flujo (tanto de software como de hardware) y desvincula flow_block."}], "lastModified": "2024-08-23T01:45:31.280", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "86D353F1-8F3A-45CF-8A7A-0DB46F77D2BF", "versionEndExcluding": "4.19.316"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "28B0AAED-45BA-4928-9A85-66A429B9F038", "versionEndExcluding": "5.4.262", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "66D916C3-4087-44FF-9CD9-D2826BCC9E3D", "versionEndExcluding": "5.10.198", "versionStartIncluding": "5.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9AB342AE-A62E-4947-A6EA-511453062B2B", "versionEndExcluding": "5.15.26", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C76BAB21-7F23-4AD8-A25F-CA7B262A2698", "versionEndExcluding": "5.16.12", "versionStartIncluding": "5.16"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}