// For flags

CVE-2024-35976

xsk: validate user input for XDP_{UMEM|COMPLETION}_FILL_RING

Severity Score

6.7
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track*
*SSVC
Descriptions

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 &lt;48&gt; 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---

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:Track*
Exploitation
None
Automatable
No
Tech. Impact
Total
* Organization's Worst-case Scenario
Timeline
  • 2024-05-17 CVE Reserved
  • 2024-05-20 CVE Published
  • 2024-05-21 EPSS Updated
  • 2024-08-02 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-787: Out-of-bounds Write
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 4.18 < 4.19.317
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.18 < 4.19.317"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 4.18 < 5.4.278
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.18 < 5.4.278"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 4.18 < 5.10.216
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.18 < 5.10.216"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 4.18 < 5.15.156
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.18 < 5.15.156"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 4.18 < 6.1.87
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.18 < 6.1.87"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 4.18 < 6.6.28
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.18 < 6.6.28"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 4.18 < 6.8.7
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.18 < 6.8.7"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 4.18 < 6.9
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.18 < 6.9"
en
Affected