In the Linux kernel, the following vulnerability has been resolved: xsk: validate user input for XDP_{UMEM|COMPLETION}_FILL_RING syzbot reported an illegal copy in xsk_setsockopt() [1] Make sure to validate setsockopt() @optlen parameter. [1] BUG: KASAN: slab-out-of-bounds in copy_from_sockptr_offset include/linux/sockptr.h:49 [inline] BUG: KASAN: slab-out-of-bounds in copy_from_sockptr include/linux/sockptr.h:55 [inline] BUG: KASAN: slab-out-of-bounds in xsk_setsockopt+0x909/0xa40 net/xdp/xsk.c:1420 Read of size 4 at addr ffff888028c6cde3 by task syz-executor.0/7549 CPU: 0 PID: 7549 Comm: syz-executor.0 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 copy_from_sockptr_offset include/linux/sockptr.h:49 [inline] copy_from_sockptr include/linux/sockptr.h:55 [inline] xsk_setsockopt+0x909/0xa40 net/xdp/xsk.c:1420 do_sock_setsockopt+0x3af/0x720 net/socket.c:2311 __sys_setsockopt+0x1ae/0x250 net/socket.c:2334 __do_sys_setsockopt net/socket.c:2343 [inline] __se_sys_setsockopt net/socket.c:2340 [inline] __x64_sys_setsockopt+0xb5/0xd0 net/socket.c:2340 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7fb40587de69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb40665a0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fb4059abf80 RCX: 00007fb40587de69 RDX: 0000000000000005 RSI: 000000000000011b RDI: 0000000000000006 RBP: 00007fb4058ca47a R08: 0000000000000002 R09: 0000000000000000 R10: 0000000020001980 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fb4059abf80 R15: 00007fff57ee4d08 </TASK> Allocated by task 7549: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:3966 [inline] __kmalloc+0x233/0x4a0 mm/slub.c:3979 kmalloc include/linux/slab.h:632 [inline] __cgroup_bpf_run_filter_setsockopt+0xd2f/0x1040 kernel/bpf/cgroup.c:1869 do_sock_setsockopt+0x6b4/0x720 net/socket.c:2293 __sys_setsockopt+0x1ae/0x250 net/socket.c:2334 __do_sys_setsockopt net/socket.c:2343 [inline] __se_sys_setsockopt net/socket.c:2340 [inline] __x64_sys_setsockopt+0xb5/0xd0 net/socket.c:2340 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 The buggy address belongs to the object at ffff888028c6cde0 which belongs to the cache kmalloc-8 of size 8 The buggy address is located 1 bytes to the right of allocated 2-byte region [ffff888028c6cde0, ffff888028c6cde2) The buggy address belongs to the physical page: page:ffffea0000a31b00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888028c6c9c0 pfn:0x28c6c anon flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000800 ffff888014c41280 0000000000000000 dead000000000001 raw: ffff888028c6c9c0 0000000080800057 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 6648, tgid 6644 (syz-executor.0), ts 133906047828, free_ts 133859922223 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1533 prep_new_page mm/page_alloc.c: ---truncated---
En el kernel de Linux, se resolvió la siguiente vulnerabilidad: xsk: validar la entrada del usuario para XDP_{UMEM|COMPLETION}_FILL_RING syzbot informó una copia ilegal en xsk_setsockopt() [1] Asegúrese de validar el parámetro @optlen setsockopt(). [1] BUG: KASAN: losa fuera de límites en copy_from_sockptr_offset include/linux/sockptr.h:49 [en línea] ERROR: KASAN: losa fuera de límites en copy_from_sockptr include/linux/sockptr.h:55 [en línea] ERROR: KASAN: losa fuera de límites en xsk_setsockopt+0x909/0xa40 net/xdp/xsk.c:1420 Lectura de tamaño 4 en la dirección ffff888028c6cde3 mediante la tarea syz-executor.0/7549 CPU: 0 PID: 7549 Comm: syz-executor.0 No contaminado 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 27/03/2024 Seguimiento de llamadas: __dump_stack lib/dump_stack .c:88 [en línea] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [en línea] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/ 0x180 mm/kasan/report.c:601 copy_from_sockptr_offset include/linux/sockptr.h:49 [en línea] copy_from_sockptr include/linux/sockptr.h:55 [en línea] xsk_setsockopt+0x909/0xa40 net/xdp/xsk.c:1420 do_sock_setsockopt+0x3af/0x720 net/socket.c:2311 __sys_setsockopt+0x1ae/0x250 net/socket.c:2334 __do_sys_setsockopt net/socket.c:2343 [en línea] __se_sys_setsockopt net/socket.c:2340 [en línea] x64_sys_setsockopt+0xb5/ 0xd0 net/socket.c:2340 do_syscall_64+0xfb/0x240 Entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7fb40587de69 Código: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 0c8 EFLAGS: 00000246 ORIG_RAX : 0000000000000036 RAX: ffffffffffffffda RBX: 00007fb4059abf80 RCX: 00007fb40587de69 RDX: 0000000000000005 RSI: 000000000000011b RDI: 000000000 0000006 RBP: 00007fb4058ca47a R08: 0000000000000002 R09: 0000000000000000 R10: 0000000020001980 R11: 0000000000000246 R12: 000000000 0000000 R13: 000000000000000b R14: 00007fb4059abf80 R15: 00007fff57ee4d08 Asignado por tarea 7549: kasan_save_stack mm/kasan/common.c:47 [en línea] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 veneno_kmalloc_redzone mm/kasan/common.c:370 [en línea] __kasan_kmalloc+0x98/ 0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [en línea] __do_kmalloc_node mm/slub.c:3966 [en línea] __kmalloc+0x233/0x4a0 mm/slub.c:3979 kmalloc include/linux /slab.h:632 [en línea] __cgroup_bpf_run_filter_setsockopt+0xd2f/0x1040 kernel/bpf/cgroup.c:1869 do_sock_setsockopt+0x6b4/0x720 net/socket.c:2293 __sys_setsockopt+0x1ae/0x250 334 __do_sys_setsockopt net/ socket.c:2343 [en línea] __se_sys_setsockopt net/socket.c:2340 [en línea] __x64_sys_setsockopt+0xb5/0xd0 net/socket.c:2340 do_syscall_64+0xfb/0x240 Entry_SYSCALL_64_after_hwframe+0x6d/0x75 El error la dirección pertenece al objeto en ffff888028c6cde0 que pertenece al caché kmalloc-8 de tamaño 8 La dirección con errores se encuentra 1 byte a la derecha de la región asignada de 2 bytes [ffff888028c6cde0, ffff888028c6cde2) La dirección con errores pertenece a la página física: página:ffffea0000a31b00 refcount:1 mapcount:0 Mapeo: 00000000000000000000 ÍNDICE: 0xffff888028c6c9c0 pfn: 0x28c6c Anon Flags: 0xffff00000000800 (Slab | Node = 0 | Zone = 1 | LastCpupid = 0x7ff) Page_Type: 0xffffffffffff () RAW: 00FFF000000800 0000000000000000 Dead000000000001 Raw: FFFFF888028C6C9C0 000000000080800057 00000001FFFFFFFFFFFFFFF 0000000000000000 Página arrojada porque: Kasan : mal acceso detectado page_owner rastrea la página como página asignada por última vez mediante orden 0, migrar tipo Inamovible, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 6648, tgid 6644 (syz-executor.0), ts 133906047828, free_ts 133859922223 set _page_owner incluye /linux/page_owner.h:31 [en línea] post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1533 prep_new_page mm/page_alloc.c: ---truncado---
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
| Attack Vector | LOCAL |
|---|---|
| Attack Complexity | LOW |
| Privileges Required | LOW |
| User Interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality Impact | HIGH |
| Integrity Impact | NONE |
| Availability Impact | HIGH |
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Type: Secondary
Exploitability Score: 1.8
Impact Score: 5.2
| Source | Type | Description |
|---|---|---|
| 134c704f-9b21-4f2e-91b3-4a467353bcc0 | Secondary |
en
CWE-787
|
| Vendor | Product | Version | Update | Type |
|---|---|---|---|---|
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd3401a5300> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd36b37d3c0> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd368d0bb40> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd36b37e9c0> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd3401a7e80> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd3401a4a80> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd368d09b40> | Operating System |
| linux | linux_kernel | 6.9 | <built-in method update of dict object at 0x7fd36b3f2d00> | Operating System |
| linux | linux_kernel | 6.9 | <built-in method update of dict object at 0x7fd3703bae00> | Operating System |
| linux | linux_kernel | 6.9 | <built-in method update of dict object at 0x7fd3401a6d80> | Operating System |
| Vulnerable | CPE |
|---|---|
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.9:rc1:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.9:rc2:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.9:rc3:*:*:*:*:*:* |