CVE-2022-48956

{"id": "CVE-2022-48956", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "published": "2024-10-21T20:15:06.973", "references": [{"url": "https://git.kernel.org/stable/c/6b6d3be3661bff2746cab26147bd629aa034e094", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/7390c70bd431cbfa6951477e2c80a301643e284b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/7e0dcd5f3ade221a6126278aca60c8ab4cc3bce9", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/803e84867de59a1e5d126666d25eb4860cfd2ebe", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/8208d7e56b1e579320b9ff3712739ad2e63e1f86", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9b1a468a455d8319041528778d0e684a4c062792", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b3d7ff8c04a83279fb7641fc4d5aa82a602df7c0", "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\nipv6: avoid use-after-free in ip6_fragment()\n\nBlamed commit claimed rcu_read_lock() was held by ip6_fragment() callers.\n\nIt seems to not be always true, at least for UDP stack.\n\nsyzbot reported:\n\nBUG: KASAN: use-after-free in ip6_dst_idev include/net/ip6_fib.h:245 [inline]\nBUG: KASAN: use-after-free in ip6_fragment+0x2724/0x2770 net/ipv6/ip6_output.c:951\nRead of size 8 at addr ffff88801d403e80 by task syz-executor.3/7618\n\nCPU: 1 PID: 7618 Comm: syz-executor.3 Not tainted 6.1.0-rc6-syzkaller-00012-g4312098baf37 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022\nCall Trace:\n <TASK>\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106\n print_address_description mm/kasan/report.c:284 [inline]\n print_report+0x15e/0x45d mm/kasan/report.c:395\n kasan_report+0xbf/0x1f0 mm/kasan/report.c:495\n ip6_dst_idev include/net/ip6_fib.h:245 [inline]\n ip6_fragment+0x2724/0x2770 net/ipv6/ip6_output.c:951\n __ip6_finish_output net/ipv6/ip6_output.c:193 [inline]\n ip6_finish_output+0x9a3/0x1170 net/ipv6/ip6_output.c:206\n NF_HOOK_COND include/linux/netfilter.h:291 [inline]\n ip6_output+0x1f1/0x540 net/ipv6/ip6_output.c:227\n dst_output include/net/dst.h:445 [inline]\n ip6_local_out+0xb3/0x1a0 net/ipv6/output_core.c:161\n ip6_send_skb+0xbb/0x340 net/ipv6/ip6_output.c:1966\n udp_v6_send_skb+0x82a/0x18a0 net/ipv6/udp.c:1286\n udp_v6_push_pending_frames+0x140/0x200 net/ipv6/udp.c:1313\n udpv6_sendmsg+0x18da/0x2c80 net/ipv6/udp.c:1606\n inet6_sendmsg+0x9d/0xe0 net/ipv6/af_inet6.c:665\n sock_sendmsg_nosec net/socket.c:714 [inline]\n sock_sendmsg+0xd3/0x120 net/socket.c:734\n sock_write_iter+0x295/0x3d0 net/socket.c:1108\n call_write_iter include/linux/fs.h:2191 [inline]\n new_sync_write fs/read_write.c:491 [inline]\n vfs_write+0x9ed/0xdd0 fs/read_write.c:584\n ksys_write+0x1ec/0x250 fs/read_write.c:637\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\nRIP: 0033:0x7fde3588c0d9\nCode: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007fde365b6168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001\nRAX: ffffffffffffffda RBX: 00007fde359ac050 RCX: 00007fde3588c0d9\nRDX: 000000000000ffdc RSI: 00000000200000c0 RDI: 000000000000000a\nRBP: 00007fde358e7ae9 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\nR13: 00007fde35acfb1f R14: 00007fde365b6300 R15: 0000000000022000\n </TASK>\n\nAllocated by task 7618:\n kasan_save_stack+0x22/0x40 mm/kasan/common.c:45\n kasan_set_track+0x25/0x30 mm/kasan/common.c:52\n __kasan_slab_alloc+0x82/0x90 mm/kasan/common.c:325\n kasan_slab_alloc include/linux/kasan.h:201 [inline]\n slab_post_alloc_hook mm/slab.h:737 [inline]\n slab_alloc_node mm/slub.c:3398 [inline]\n slab_alloc mm/slub.c:3406 [inline]\n __kmem_cache_alloc_lru mm/slub.c:3413 [inline]\n kmem_cache_alloc+0x2b4/0x3d0 mm/slub.c:3422\n dst_alloc+0x14a/0x1f0 net/core/dst.c:92\n ip6_dst_alloc+0x32/0xa0 net/ipv6/route.c:344\n ip6_rt_pcpu_alloc net/ipv6/route.c:1369 [inline]\n rt6_make_pcpu_route net/ipv6/route.c:1417 [inline]\n ip6_pol_route+0x901/0x1190 net/ipv6/route.c:2254\n pol_lookup_func include/net/ip6_fib.h:582 [inline]\n fib6_rule_lookup+0x52e/0x6f0 net/ipv6/fib6_rules.c:121\n ip6_route_output_flags_noref+0x2e6/0x380 net/ipv6/route.c:2625\n ip6_route_output_flags+0x76/0x320 net/ipv6/route.c:2638\n ip6_route_output include/net/ip6_route.h:98 [inline]\n ip6_dst_lookup_tail+0x5ab/0x1620 net/ipv6/ip6_output.c:1092\n ip6_dst_lookup_flow+0x90/0x1d0 net/ipv6/ip6_output.c:1222\n ip6_sk_dst_lookup_flow+0x553/0x980 net/ipv6/ip6_output.c:1260\n udpv6_sendmsg+0x151d/0x2c80 net/ipv6/udp.c:1554\n inet6_sendmsg+0x9d/0xe0 net/ipv6/af_inet6.c:665\n sock_sendmsg_nosec n\n---truncated---"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ipv6: evitar el use after free en ip6_fragment(). el commit culpable afirmaba que rcu_read_lock() estaba retenido por los llamadores de ip6_fragment(). Parece que no siempre es cierto, al menos para la pila UDP. syzbot inform\u00f3: ERROR: KASAN: use after free en ip6_dst_idev include/net/ip6_fib.h:245 [en l\u00ednea] ERROR: KASAN: use after free en ip6_fragment+0x2724/0x2770 net/ipv6/ip6_output.c:951 Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff88801d403e80 por la tarea syz-executor.3/7618 CPU: 1 PID: 7618 Comm: syz-executor.3 No contaminado 6.1.0-rc6-syzkaller-00012-g4312098baf37 #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 26/10/2022 Seguimiento de llamadas: __dump_stack lib/dump_stack.c:88 [en l\u00ednea] dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106 imprimir_descripci\u00f3n_de_direcci\u00f3n mm/kasan/report.c:284 [en l\u00ednea] imprimir_report+0x15e/0x45d mm/kasan/report.c:395 kasan_report+0xbf/0x1f0 mm/kasan/report.c:495 ip6_dst_idev include/net/ip6_fib.h:245 [en l\u00ednea] ip6_fragment+0x2724/0x2770 net/ipv6/ip6_output.c:951 __ip6_finish_output net/ipv6/ip6_output.c:193 [en l\u00ednea] ip6_finish_output+0x9a3/0x1170 net/ipv6/ip6_output.c:206 NF_HOOK_COND incluir/linux/netfilter.h:291 [en l\u00ednea] ip6_output+0x1f1/0x540 net/ipv6/ip6_output.c:227 dst_output incluir/net/dst.h:445 [en l\u00ednea] ip6_local_out+0xb3/0x1a0 net/ipv6/output_core.c:161 ip6_send_skb+0xbb/0x340 net/ipv6/ip6_output.c:1966 udp_v6_send_skb+0x82a/0x18a0 net/ipv6/udp.c:1286 udp_v6_push_pending_frames+0x140/0x200 net/ipv6/udp.c:1313 udpv6_sendmsg+0x18da/0x2c80 net/ipv6/udp.c:1606 inet6_sendmsg+0x9d/0xe0 net/ipv6/af_inet6.c:665 sock_sendmsg_nosec net/socket.c:714 [en l\u00ednea] sock_sendmsg+0xd3/0x120 net/socket.c:734 sock_write_iter+0x295/0x3d0 net/socket.c:1108 call_write_iter include/linux/fs.h:2191 [en l\u00ednea] new_sync_write fs/read_write.c:491 [en l\u00ednea] vfs_write+0x9ed/0xdd0 fs/read_write.c:584 ksys_write+0x1ec/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [en l\u00ednea] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fde3588c0d9 C\u00f3digo: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 &lt;48&gt; 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fde365b6168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fde359ac050 RCX: 00007fde3588c0d9 RDX: 000000000000ffdc RSI: 00000000200000c0 RDI: 000000000000000a RBP: 00007fde358e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000 R13: 00007fde35acfb1f R14: 00007fde365b6300 R15: 0000000000022000 Asignado por la tarea 7618: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 __kasan_slab_alloc+0x82/0x90 mm/kasan/common.c:325 kasan_slab_alloc include/linux/kasan.h:201 [en l\u00ednea] gancho_alloc_poste_losa mm/slab.h:737 [en l\u00ednea] nodo_alloc_losa mm/slub.c:3398 [en l\u00ednea] losa_alloc mm/slub.c:3406 [en l\u00ednea] __kmem_cache_alloc_lru mm/slub.c:3413 [en l\u00ednea] kmem_cache_alloc+0x2b4/0x3d0 mm/slub.c:3422 dst_alloc+0x14a/0x1f0 net/core/dst.c:92 ip6_dst_alloc+0x32/0xa0 net/ipv6/route.c:344 ip6_rt_pcpu_alloc net/ipv6/route.c:1369 [en l\u00ednea] rt6_make_pcpu_route net/ipv6/route.c:1417 [en l\u00ednea] ip6_pol_route+0x901/0x1190 net/ipv6/route.c:2254 pol_lookup_func include/net/ip6_fib.h:582 [en l\u00ednea] fib6_rule_lookup+0x52e/0x6f0 net/ipv6/fib6_rules.c:121 ip6_route_output_flags_noref+0x2e6/0x380 net/ipv6/route.c:2625 banderas de salida de ruta ip6+0x76/0x320 red/ipv6/route.c:2638 salida de ruta ip6 incluir/red/ip6_route.h:98 [en l\u00ednea] cola de b\u00fasqueda de dst ip6+0x5ab/0x1620 red/ipv6/ip6_output.c:1092 flujo de b\u00fasqueda de dst ip6+0x90/0x1d0 red/ipv6/ip6_output.c:1222 flujo de b\u00fasqueda de dst ip6_sk+0x553/0x980 red/ipv6/ip6_output.c:1260 env\u00edo de mensajes de env\u00edo udpv6+0x151d/0x2c80 red/ipv6/udp.c:1554 ---truncado---"}], "lastModified": "2024-10-24T19:59:47.737", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8B25993C-17C7-4FC1-9333-2F4935DA4E7D", "versionEndExcluding": "4.14.302", "versionStartIncluding": "4.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1185B8E3-712E-4BFB-BD01-78D47F7EF1F2", "versionEndExcluding": "4.19.269", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8C752145-904B-474A-A7F2-E9F29353B0FE", "versionEndExcluding": "5.4.227", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7318B597-DFFD-4BBC-A947-539D6E30D82A", "versionEndExcluding": "5.10.159", "versionStartIncluding": "5.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "90897BD1-104D-4CFF-94F5-29F9041217FB", "versionEndExcluding": "5.15.83", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "389392A7-81C4-4C26-884B-8C7CF0F53DA4", "versionEndExcluding": "6.0.13", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E7E331DA-1FB0-4DEC-91AC-7DA69D461C11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "17F0B248-42CF-4AE6-A469-BB1BAE7F4705"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E2422816-0C14-4B5E-A1E6-A9D776E5C49B"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1C6E00FE-5FB9-4D20-A1A1-5A32128F9B76"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "35B26BE4-43A6-4A36-A7F6-5B3F572D9186"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3FFFB0B3-930D-408A-91E2-BAE0C2715D80"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8535320E-A0DB-4277-800E-D0CE5BBA59E8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc8:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "21718AA4-4056-40F2-968E-BDAA465A7872"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}