CVE-2024-27061
crypto: sun8i-ce - Fix use after free in unprepare
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In the Linux kernel, the following vulnerability has been resolved:
crypto: sun8i-ce - Fix use after free in unprepare
sun8i_ce_cipher_unprepare should be called before
crypto_finalize_skcipher_request, because client callbacks may
immediately free memory, that isn't needed anymore. But it will be
used by unprepare after free. Before removing prepare/unprepare
callbacks it was handled by crypto engine in crypto_finalize_request.
Usually that results in a pointer dereference problem during a in
crypto selftest.
Unable to handle kernel NULL pointer dereference at
virtual address 0000000000000030
Mem abort info:
ESR = 0x0000000096000004
EC = 0x25: DABT (current EL), IL = 32 bits
SET = 0, FnV = 0
EA = 0, S1PTW = 0
FSC = 0x04: level 0 translation fault
Data abort info:
ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
CM = 0, WnR = 0, TnD = 0, TagAccess = 0
GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
user pgtable: 4k pages, 48-bit VAs, pgdp=000000004716d000
[0000000000000030] pgd=0000000000000000, p4d=0000000000000000
Internal error: Oops: 0000000096000004 [#1] SMP
This problem is detected by KASAN as well.
==================================================================
BUG: KASAN: slab-use-after-free in sun8i_ce_cipher_do_one+0x6e8/0xf80 [sun8i_ce]
Read of size 8 at addr ffff00000dcdc040 by task 1c15000.crypto-/373
Hardware name: Pine64 PinePhone (1.2) (DT)
Call trace:
dump_backtrace+0x9c/0x128
show_stack+0x20/0x38
dump_stack_lvl+0x48/0x60
print_report+0xf8/0x5d8
kasan_report+0x90/0xd0
__asan_load8+0x9c/0xc0
sun8i_ce_cipher_do_one+0x6e8/0xf80 [sun8i_ce]
crypto_pump_work+0x354/0x620 [crypto_engine]
kthread_worker_fn+0x244/0x498
kthread+0x168/0x178
ret_from_fork+0x10/0x20
Allocated by task 379:
kasan_save_stack+0x3c/0x68
kasan_set_track+0x2c/0x40
kasan_save_alloc_info+0x24/0x38
__kasan_kmalloc+0xd4/0xd8
__kmalloc+0x74/0x1d0
alg_test_skcipher+0x90/0x1f0
alg_test+0x24c/0x830
cryptomgr_test+0x38/0x60
kthread+0x168/0x178
ret_from_fork+0x10/0x20
Freed by task 379:
kasan_save_stack+0x3c/0x68
kasan_set_track+0x2c/0x40
kasan_save_free_info+0x38/0x60
__kasan_slab_free+0x100/0x170
slab_free_freelist_hook+0xd4/0x1e8
__kmem_cache_free+0x15c/0x290
kfree+0x74/0x100
kfree_sensitive+0x80/0xb0
alg_test_skcipher+0x12c/0x1f0
alg_test+0x24c/0x830
cryptomgr_test+0x38/0x60
kthread+0x168/0x178
ret_from_fork+0x10/0x20
The buggy address belongs to the object at ffff00000dcdc000
which belongs to the cache kmalloc-256 of size 256
The buggy address is located 64 bytes inside of
freed 256-byte region [ffff00000dcdc000, ffff00000dcdc100)
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: crypto: sun8i-ce: se corrige el use after free en unprepare. Se debe llamar a sun8i_ce_cipher_unprepare antes de crypto_finalize_skcipher_request, porque las devoluciones de llamada del cliente pueden liberar inmediatamente memoria, que ya no es necesaria. Pero será utilizado por los que no estén preparados después de ser gratuito. Antes de eliminar las devoluciones de llamada de preparación/despreparación, el motor criptográfico lo manejaba en crypto_finalize_request. Por lo general, esto resulta en un problema de desreferencia del puntero durante una autoprueba en criptografía. No se puede manejar la desreferencia del puntero NULL del kernel en la dirección virtual 0000000000000030 Información de cancelación de memoria: ESR = 0x0000000096000004 EC = 0x25: DABT (EL actual), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x04: falla de traducción de nivel 0 Información de cancelación de datos: ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 usuario pgtable: páginas de 4k, VA de 48 bits, pgdp=000000004716d000 [0000000000000030] pgd=0000000000000000, p4d=000000000000000000 Error interno: Ups: 0000000096000004 [# 1] SMP Este problema también lo detecta KASAN. ==================================================== ================ ERROR: KASAN: slab-use-after-free en sun8i_ce_cipher_do_one+0x6e8/0xf80 [sun8i_ce] Lectura de tamaño 8 en la dirección ffff00000dcdc040 por tarea 1c15000.crypto-/ 373 Nombre del hardware: Pine64 PinePhone (1.2) (DT) Rastreo de llamadas: dump_backtrace+0x9c/0x128 show_stack+0x20/0x38 dump_stack_lvl+0x48/0x60 print_report+0xf8/0x5d8 kasan_report+0x90/0xd0 __asan_load8+0x9c/0xc0 _cipher_do_one+0x6e8/0xf80 [sun8i_ce] crypto_pump_work+0x354/0x620 [crypto_engine] kthread_worker_fn+0x244/0x498 kthread+0x168/0x178 ret_from_fork+0x10/0x20 Asignado por tarea 379: kasan_save_stack+0x3c/0x68 c/0x40 kasan_save_alloc_info+0x24/0x38 __kasan_kmalloc+0xd4/ 0xd8 __kmalloc+0x74/0x1d0 alg_test_skcipher+0x90/0x1f0 alg_test+0x24c/0x830 cryptomgr_test+0x38/0x60 kthread+0x168/0x178 ret_from_fork+0x10/0x20 Liberado por la tarea 379: 3c/0x68 kasan_set_track+0x2c/0x40 kasan_save_free_info+0x38/ 0x60 __kasan_slab_free+0x100/0x170 slab_free_freelist_hook+0xd4/0x1e8 __kmem_cache_free+0x15c/0x290 kfree+0x74/0x100 kfree_SENSITIVE+0x80/0xb0 alg_test_skcipher+0x12c/0x1f0 24c/0x830 cryptomgr_test+0x38/0x60 kthread+0x168/0x178 ret_from_fork+0x10/ 0x20 La dirección con errores pertenece al objeto en ffff00000dcdc000 que pertenece al caché kmalloc-256 de tamaño 256. La dirección con errores se encuentra a 64 bytes dentro de la región liberada de 256 bytes [ffff00000dcdc000, ffff00000dcdc100)
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-02-19 CVE Reserved
- 2024-05-01 CVE Published
- 2024-05-02 EPSS Updated
- 2024-12-19 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (4)
URL | Tag | Source |
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https://git.kernel.org/stable/c/4136212ab18eb3dce6efb6e18108765c36708f71 | Vuln. Introduced |
URL | Date | SRC |
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URL | Date | SRC |
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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" | >= 6.6 < 6.6.24 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.6 < 6.6.24" | en |
Affected
| ||||||
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.6 < 6.7.12 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.6 < 6.7.12" | en |
Affected
| ||||||
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.6 < 6.8 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.6 < 6.8" | en |
Affected
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