CVE-2024-53177

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2024-53177
In the Linux kernel, the following vulnerability has been resolved: smb: prevent use-after-free due to open_cached_dir error paths If open_cached_dir() encounters an error parsing the lease from the server, the error handling may race with receiving a lease break, resulting in open_cached_dir() freeing the cfid while the queued work is pending. Update open_cached_dir() to drop refs rather than directly freeing the cfid. Have cached_dir_lease_break(), cfids_laundromat_worker(), and invalidate_all_cached_dirs() clear has_lease immediately while still holding cfids->cfid_list_lock, and then use this to also simplify the reference counting in cfids_laundromat_worker() and invalidate_all_cached_dirs(). Fixes this KASAN splat (which manually injects an error and lease break in open_cached_dir()): ================================================================== BUG: KASAN: slab-use-after-free in smb2_cached_lease_break+0x27/0xb0 Read of size 8 at addr ffff88811cc24c10 by task kworker/3:1/65 CPU: 3 UID: 0 PID: 65 Comm: kworker/3:1 Not tainted 6.12.0-rc6-g255cf264e6e5-dirty #87 Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 11/12/2020 Workqueue: cifsiod smb2_cached_lease_break Call Trace: <TASK> dump_stack_lvl+0x77/0xb0 print_report+0xce/0x660 kasan_report+0xd3/0x110 smb2_cached_lease_break+0x27/0xb0 process_one_work+0x50a/0xc50 worker_thread+0x2ba/0x530 kthread+0x17c/0x1c0 ret_from_fork+0x34/0x60 ret_from_fork_asm+0x1a/0x30 </TASK> Allocated by task 2464: kasan_save_stack+0x33/0x60 kasan_save_track+0x14/0x30 __kasan_kmalloc+0xaa/0xb0 open_cached_dir+0xa7d/0x1fb0 smb2_query_path_info+0x43c/0x6e0 cifs_get_fattr+0x346/0xf10 cifs_get_inode_info+0x157/0x210 cifs_revalidate_dentry_attr+0x2d1/0x460 cifs_getattr+0x173/0x470 vfs_statx_path+0x10f/0x160 vfs_statx+0xe9/0x150 vfs_fstatat+0x5e/0xc0 __do_sys_newfstatat+0x91/0xf0 do_syscall_64+0x95/0x1a0 entry_SYSCALL_64_after_hwframe+0x76/0x7e Freed by task 2464: kasan_save_stack+0x33/0x60 kasan_save_track+0x14/0x30 kasan_save_free_info+0x3b/0x60 __kasan_slab_free+0x51/0x70 kfree+0x174/0x520 open_cached_dir+0x97f/0x1fb0 smb2_query_path_info+0x43c/0x6e0 cifs_get_fattr+0x346/0xf10 cifs_get_inode_info+0x157/0x210 cifs_revalidate_dentry_attr+0x2d1/0x460 cifs_getattr+0x173/0x470 vfs_statx_path+0x10f/0x160 vfs_statx+0xe9/0x150 vfs_fstatat+0x5e/0xc0 __do_sys_newfstatat+0x91/0xf0 do_syscall_64+0x95/0x1a0 entry_SYSCALL_64_after_hwframe+0x76/0x7e Last potentially related work creation: kasan_save_stack+0x33/0x60 __kasan_record_aux_stack+0xad/0xc0 insert_work+0x32/0x100 __queue_work+0x5c9/0x870 queue_work_on+0x82/0x90 open_cached_dir+0x1369/0x1fb0 smb2_query_path_info+0x43c/0x6e0 cifs_get_fattr+0x346/0xf10 cifs_get_inode_info+0x157/0x210 cifs_revalidate_dentry_attr+0x2d1/0x460 cifs_getattr+0x173/0x470 vfs_statx_path+0x10f/0x160 vfs_statx+0xe9/0x150 vfs_fstatat+0x5e/0xc0 __do_sys_newfstatat+0x91/0xf0 do_syscall_64+0x95/0x1a0 entry_SYSCALL_64_after_hwframe+0x76/0x7e The buggy address belongs to the object at ffff88811cc24c00 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 16 bytes inside of freed 1024-byte region [ffff88811cc24c00, ffff88811cc25000)

7.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/47655a12c6b1bca8fa230085eab2e85a076932b7 Patch
https://git.kernel.org/stable/c/791f833053578b9fd24252ebb7162a61bc3f805b Patch
https://git.kernel.org/stable/c/97e2afcac0bebfef6a5360f4267ce4c44507b845 Patch
https://git.kernel.org/stable/c/a9685b409a03b73d2980bbfa53eb47555802d0a9 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

24 Mar 2025, 17:26

Type Values Removed Values Added
First Time Linux linux Kernel
Linux
References () https://git.kernel.org/stable/c/47655a12c6b1bca8fa230085eab2e85a076932b7 - () https://git.kernel.org/stable/c/47655a12c6b1bca8fa230085eab2e85a076932b7 - Patch
References () https://git.kernel.org/stable/c/791f833053578b9fd24252ebb7162a61bc3f805b - () https://git.kernel.org/stable/c/791f833053578b9fd24252ebb7162a61bc3f805b - Patch
References () https://git.kernel.org/stable/c/97e2afcac0bebfef6a5360f4267ce4c44507b845 - () https://git.kernel.org/stable/c/97e2afcac0bebfef6a5360f4267ce4c44507b845 - Patch
References () https://git.kernel.org/stable/c/a9685b409a03b73d2980bbfa53eb47555802d0a9 - () https://git.kernel.org/stable/c/a9685b409a03b73d2980bbfa53eb47555802d0a9 - Patch
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

11 Feb 2025, 16:15

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: smb: evitar el use-after-free debido a las rutas de error de open_cached_dir Si open_cached_dir() encuentra un error al analizar el arrendamiento desde el servidor, la gestión de errores puede acelerarse con la recepción de una interrupción del arrendamiento, lo que da como resultado que open_cached_dir() libere el cfid mientras el trabajo en cola está pendiente. Actualice open_cached_dir() para eliminar referencias en lugar de liberar directamente el cfid. Haga que cached_dir_lease_break(), cfids_laundromat_worker() e invalidate_all_cached_dirs() borren has_lease inmediatamente mientras aún mantienen cfids-&gt;cfid_list_lock, y luego use esto para simplificar también el conteo de referencias en cfids_laundromat_worker() e invalidate_all_cached_dirs(). Corrige este problema de KASAN (que inyecta manualmente un error y una interrupción de arrendamiento en open_cached_dir()): ====================================================================== ERROR: KASAN: slab-use-after-free en smb2_cached_lease_break+0x27/0xb0 Lectura de tamaño 8 en la dirección ffff88811cc24c10 por la tarea kworker/3:1/65 CPU: 3 UID: 0 PID: 65 Comm: kworker/3:1 No contaminado 6.12.0-rc6-g255cf264e6e5-dirty #87 Nombre del hardware: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 12/11/2020 Cola de trabajo: cifsiod smb2_cached_lease_break Seguimiento de llamadas: dump_stack_lvl+0x77/0xb0 print_report+0xce/0x660 kasan_report+0xd3/0x110 smb2_cached_lease_break+0x27/0xb0 process_one_work+0x50a/0xc50 worker_thread+0x2ba/0x530 kthread+0x17c/0x1c0 ret_from_fork+0x34/0x60 ret_from_fork_asm+0x1a/0x30 Asignado por la tarea 2464: kasan_save_stack+0x33/0x60 kasan_save_track+0x14/0x30 __kasan_kmalloc+0xaa/0xb0 directorio_caché_abierto+0xa7d/0x1fb0 información_ruta_consulta_smb2+0x43c/0x6e0 cifs_get_fattr+0x346/0xf10 información_inodo_obtener_cifs+0x157/0x210 cifs_revalidate_dentry_attr+0x2d1/0x460 cifs_getattr+0x173/0x470 ruta_statx_vfs+0x10f/0x160 vfs_statx+0xe9/0x150 vfs_fstatat+0x5e/0xc0 __do_sys_newfstatat+0x91/0xf0 do_syscall_64+0x95/0x1a0 entry_SYSCALL_64_after_hwframe+0x76/0x7e Liberado por la tarea 2464: kasan_save_stack+0x33/0x60 kasan_save_track+0x14/0x30 kasan_save_free_info+0x3b/0x60 __kasan_slab_free+0x51/0x70 kfree+0x174/0x520 open_cached_dir+0x97f/0x1fb0 smb2_query_path_info+0x43c/0x6e0 cifs_get_fattr+0x346/0xf10 cifs_get_inode_info+0x157/0x210 cifs_revalidate_dentry_attr+0x2d1/0x460 cifs_getattr+0x173/0x470 vfs_statx_path+0x10f/0x160 vfs_statx+0xe9/0x150 vfs_fstatat+0x5e/0xc0 __do_sys_newfstatat+0x91/0xf0 do_syscall_64+0x95/0x1a0 entry_SYSCALL_64_after_hwframe+0x76/0x7e Última creación de trabajo potencialmente relacionado: kasan_save_stack+0x33/0x60 __kasan_record_aux_stack+0xad/0xc0 insert_work+0x32/0x100 __queue_work+0x5c9/0x870 cola_trabajo_activada+0x82/0x90 directorio_caché_abierto+0x1369/0x1fb0 información_ruta_consulta_smb2+0x43c/0x6e0 cifs_obtener_fattr+0x346/0xf10 cifs_obtener_información_inodo+0x157/0x210 cifs_revalidar_dentry_attr+0x2d1/0x460 cifs_getattr+0x173/0x470 ruta_statx_vfs+0x10f/0x160 vfs_statx+0xe9/0x150 vfs_fstatat+0x5e/0xc0 __do_sys_newfstatat+0x91/0xf0 do_syscall_64+0x95/0x1a0 entry_SYSCALL_64_after_hwframe+0x76/0x7e La dirección con errores pertenece al objeto en ffff88811cc24c00 que pertenece al caché kmalloc-1k de tamaño 1024 La dirección con errores se encuentra 16 bytes dentro de la región liberada de 1024 bytes [ffff88811cc24c00, ffff88811cc25000)
CWE CWE-416

27 Dec 2024, 14:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-12-27 14:15

Updated : 2025-03-24 17:26

NVD link : CVE-2024-53177

Mitre link : CVE-2024-53177

CVE.ORG link : CVE-2024-53177

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-416

Use After Free