CVE-2023-52434
smb: client: fix potential OOBs in smb2_parse_contexts()
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix potential OOBs in smb2_parse_contexts()
Validate offsets and lengths before dereferencing create contexts in
smb2_parse_contexts().
This fixes following oops when accessing invalid create contexts from
server:
BUG: unable to handle page fault for address: ffff8881178d8cc3
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 4a01067 P4D 4a01067 PUD 0
Oops: 0000 [#1] PREEMPT SMP NOPTI
CPU: 3 PID: 1736 Comm: mount.cifs Not tainted 6.7.0-rc4 #1
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS
rel-1.16.2-3-gd478f380-rebuilt.opensuse.org 04/01/2014
RIP: 0010:smb2_parse_contexts+0xa0/0x3a0 [cifs]
Code: f8 10 75 13 48 b8 93 ad 25 50 9c b4 11 e7 49 39 06 0f 84 d2 00
00 00 8b 45 00 85 c0 74 61 41 29 c5 48 01 c5 41 83 fd 0f 76 55 <0f> b7
7d 04 0f b7 45 06 4c 8d 74 3d 00 66 83 f8 04 75 bc ba 04 00
RSP: 0018:ffffc900007939e0 EFLAGS: 00010216
RAX: ffffc90000793c78 RBX: ffff8880180cc000 RCX: ffffc90000793c90
RDX: ffffc90000793cc0 RSI: ffff8880178d8cc0 RDI: ffff8880180cc000
RBP: ffff8881178d8cbf R08: ffffc90000793c22 R09: 0000000000000000
R10: ffff8880180cc000 R11: 0000000000000024 R12: 0000000000000000
R13: 0000000000000020 R14: 0000000000000000 R15: ffffc90000793c22
FS: 00007f873753cbc0(0000) GS:ffff88806bc00000(0000)
knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8881178d8cc3 CR3: 00000000181ca000 CR4: 0000000000750ef0
PKRU: 55555554
Call Trace:
<TASK>
? __die+0x23/0x70
? page_fault_oops+0x181/0x480
? search_module_extables+0x19/0x60
? srso_alias_return_thunk+0x5/0xfbef5
? exc_page_fault+0x1b6/0x1c0
? asm_exc_page_fault+0x26/0x30
? smb2_parse_contexts+0xa0/0x3a0 [cifs]
SMB2_open+0x38d/0x5f0 [cifs]
? smb2_is_path_accessible+0x138/0x260 [cifs]
smb2_is_path_accessible+0x138/0x260 [cifs]
cifs_is_path_remote+0x8d/0x230 [cifs]
cifs_mount+0x7e/0x350 [cifs]
cifs_smb3_do_mount+0x128/0x780 [cifs]
smb3_get_tree+0xd9/0x290 [cifs]
vfs_get_tree+0x2c/0x100
? capable+0x37/0x70
path_mount+0x2d7/0xb80
? srso_alias_return_thunk+0x5/0xfbef5
? _raw_spin_unlock_irqrestore+0x44/0x60
__x64_sys_mount+0x11a/0x150
do_syscall_64+0x47/0xf0
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f8737657b1e
En el kernel de Linux, se resolvió la siguiente vulnerabilidad: smb: cliente: corrige OOB potenciales en smb2_parse_contexts() Valida compensaciones y longitudes antes de desreferenciar crea contextos en smb2_parse_contexts(). Esto corrige los siguientes errores al acceder a contextos de creación no válidos desde el servidor: ERROR: no se puede manejar el error de página para la dirección: ffff8881178d8cc3 #PF: acceso de lectura del supervisor en modo kernel #PF: error_code(0x0000) - página no presente PGD 4a01067 P4D 4a01067 PUD 0 Ups: 0000 [#1] PREEMPT SMP NOPTI CPU: 3 PID: 1736 Comm: mount.cifs No está contaminado 6.7.0-rc4 #1 Nombre de hardware: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.2 -3-gd478f380-rebuilt.opensuse.org 04/04/2014 RIP: 0010: SMB2_PARSE_CONTEXTS+0XA0/0X3A0 [CIFS] Código: F8 10 75 13 48 B8 93 AD 25 50 9C B4 11 E7 49 39 06 0f 84 D2 00 00 00 8b 45 00 85 c0 74 61 41 29 c5 48 01 c5 41 83 fd 0f 76 55 <0f> b7 7d 04 0f b7 45 06 4c 8d 74 3d 00 66 83 f8 04 75 bc ba 04 00 RSP: 0018:ffffc900007939e0 EFLAGS: 00010216 RAX: ffffc90000793c78 RBX: ffff8880180cc000 RCX: ffffc90000793c90 RDX: ffffc90000793cc0 RSI: ffff8880178d8cc0 RDI: ffff8880180cc000 RBP: ffff8881178d8cbf R08: ffffc90000793c22 R09: 0000000000000000 R10: ffff8880180cc000 R11: 00000000000000024 R12: 0000000000000000 R13: 0000000 000000020 R14: 00000000000000000 R15: ffffc90000793c22 FS: 00007f873753cbc0(0000) GS:ffff88806bc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff8881178d8cc3 CR3 : 00000000181ca000 CR4: 0000000000750ef0 PKRU: 55555554 Seguimiento de llamadas: ? __morir+0x23/0x70 ? page_fault_oops+0x181/0x480? search_module_extables+0x19/0x60? srso_alias_return_thunk+0x5/0xfbef5? exc_page_fault+0x1b6/0x1c0? asm_exc_page_fault+0x26/0x30? smb2_parse_contexts+0xa0/0x3a0 [cifs] SMB2_open+0x38d/0x5f0 [cifs] ? smb2_is_path_accessible+0x138/0x260 [cifs] smb2_is_path_accessible+0x138/0x260 [cifs] cifs_is_path_remote+0x8d/0x230 [cifs] cifs_mount+0x7e/0x350 [cifs] cifs_smb3_do_mount+0x128/0x7 80 [cifs] smb3_get_tree+0xd9/0x290 [cifs] vfs_get_tree+ 0x2c/0x100? capaz+0x37/0x70 path_mount+0x2d7/0xb80? srso_alias_return_thunk+0x5/0xfbef5? _raw_spin_unlock_irqrestore+0x44/0x60 __x64_sys_mount+0x11a/0x150 do_syscall_64+0x47/0xf0 Entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f8737657b1e
A flaw was found in the smb client in the Linux kernel. A potential out-of-bounds error was seen in the smb2_parse_contexts() function. Validate offsets and lengths before dereferencing create contexts in smb2_parse_contexts().
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-02-20 CVE Reserved
- 2024-02-20 CVE Published
- 2024-03-16 EPSS Updated
- 2024-12-19 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
CAPEC
References (9)
URL | Date | SRC |
---|
URL | Date | SRC |
---|---|---|
https://access.redhat.com/security/cve/CVE-2023-52434 | 2024-09-24 | |
https://bugzilla.redhat.com/show_bug.cgi?id=2265285 | 2024-09-24 |
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" | < 5.4.277 Search vendor "Linux" for product "Linux Kernel" and version " < 5.4.277" | en |
Affected
| ||||||
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 5.10.211 Search vendor "Linux" for product "Linux Kernel" and version " < 5.10.211" | en |
Affected
| ||||||
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 5.15.150 Search vendor "Linux" for product "Linux Kernel" and version " < 5.15.150" | en |
Affected
| ||||||
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 6.1.79 Search vendor "Linux" for product "Linux Kernel" and version " < 6.1.79" | en |
Affected
| ||||||
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 6.6.8 Search vendor "Linux" for product "Linux Kernel" and version " < 6.6.8" | en |
Affected
| ||||||
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 6.7 Search vendor "Linux" for product "Linux Kernel" and version " < 6.7" | en |
Affected
|