CVE-2024-26695

crypto: ccp - Fix null pointer dereference in __sev_platform_shutdown_locked

Severity Score

"-"

*CVSS v-

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

In the Linux kernel, the following vulnerability has been resolved:

crypto: ccp - Fix null pointer dereference in __sev_platform_shutdown_locked

The SEV platform device can be shutdown with a null psp_master,
e.g., using DEBUG_TEST_DRIVER_REMOVE. Found using KASAN:

[ 137.148210] ccp 0000:23:00.1: enabling device (0000 -> 0002)
[ 137.162647] ccp 0000:23:00.1: no command queues available
[ 137.170598] ccp 0000:23:00.1: sev enabled
[ 137.174645] ccp 0000:23:00.1: psp enabled
[ 137.178890] general protection fault, probably for non-canonical address 0xdffffc000000001e: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC KASAN NOPTI
[ 137.182693] KASAN: null-ptr-deref in range [0x00000000000000f0-0x00000000000000f7]
[ 137.182693] CPU: 93 PID: 1 Comm: swapper/0 Not tainted 6.8.0-rc1+ #311
[ 137.182693] RIP: 0010:__sev_platform_shutdown_locked+0x51/0x180
[ 137.182693] Code: 08 80 3c 08 00 0f 85 0e 01 00 00 48 8b 1d 67 b6 01 08 48 b8 00 00 00 00 00 fc ff df 48 8d bb f0 00 00 00 48 89 f9 48 c1 e9 03 <80> 3c 01 00 0f 85 fe 00 00 00 48 8b 9b f0 00 00 00 48 85 db 74 2c
[ 137.182693] RSP: 0018:ffffc900000cf9b0 EFLAGS: 00010216
[ 137.182693] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 000000000000001e
[ 137.182693] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 00000000000000f0
[ 137.182693] RBP: ffffc900000cf9c8 R08: 0000000000000000 R09: fffffbfff58f5a66
[ 137.182693] R10: ffffc900000cf9c8 R11: ffffffffac7ad32f R12: ffff8881e5052c28
[ 137.182693] R13: ffff8881e5052c28 R14: ffff8881758e43e8 R15: ffffffffac64abf8
[ 137.182693] FS: 0000000000000000(0000) GS:ffff889de7000000(0000) knlGS:0000000000000000
[ 137.182693] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 137.182693] CR2: 0000000000000000 CR3: 0000001cf7c7e000 CR4: 0000000000350ef0
[ 137.182693] Call Trace:
[ 137.182693] <TASK>
[ 137.182693] ? show_regs+0x6c/0x80
[ 137.182693] ? __die_body+0x24/0x70
[ 137.182693] ? die_addr+0x4b/0x80
[ 137.182693] ? exc_general_protection+0x126/0x230
[ 137.182693] ? asm_exc_general_protection+0x2b/0x30
[ 137.182693] ? __sev_platform_shutdown_locked+0x51/0x180
[ 137.182693] sev_firmware_shutdown.isra.0+0x1e/0x80
[ 137.182693] sev_dev_destroy+0x49/0x100
[ 137.182693] psp_dev_destroy+0x47/0xb0
[ 137.182693] sp_destroy+0xbb/0x240
[ 137.182693] sp_pci_remove+0x45/0x60
[ 137.182693] pci_device_remove+0xaa/0x1d0
[ 137.182693] device_remove+0xc7/0x170
[ 137.182693] really_probe+0x374/0xbe0
[ 137.182693] ? srso_return_thunk+0x5/0x5f
[ 137.182693] __driver_probe_device+0x199/0x460
[ 137.182693] driver_probe_device+0x4e/0xd0
[ 137.182693] __driver_attach+0x191/0x3d0
[ 137.182693] ? __pfx___driver_attach+0x10/0x10
[ 137.182693] bus_for_each_dev+0x100/0x190
[ 137.182693] ? __pfx_bus_for_each_dev+0x10/0x10
[ 137.182693] ? __kasan_check_read+0x15/0x20
[ 137.182693] ? srso_return_thunk+0x5/0x5f
[ 137.182693] ? _raw_spin_unlock+0x27/0x50
[ 137.182693] driver_attach+0x41/0x60
[ 137.182693] bus_add_driver+0x2a8/0x580
[ 137.182693] driver_register+0x141/0x480
[ 137.182693] __pci_register_driver+0x1d6/0x2a0
[ 137.182693] ? srso_return_thunk+0x5/0x5f
[ 137.182693] ? esrt_sysfs_init+0x1cd/0x5d0
[ 137.182693] ? __pfx_sp_mod_init+0x10/0x10
[ 137.182693] sp_pci_init+0x22/0x30
[ 137.182693] sp_mod_init+0x14/0x30
[ 137.182693] ? __pfx_sp_mod_init+0x10/0x10
[ 137.182693] do_one_initcall+0xd1/0x470
[ 137.182693] ? __pfx_do_one_initcall+0x10/0x10
[ 137.182693] ? parameq+0x80/0xf0
[ 137.182693] ? srso_return_thunk+0x5/0x5f
[ 137.182693] ? __kmalloc+0x3b0/0x4e0
[ 137.182693] ? kernel_init_freeable+0x92d/0x1050
[ 137.182693] ? kasan_populate_vmalloc_pte+0x171/0x190
[ 137.182693] ? srso_return_thunk+0x5/0x5f
[ 137.182693] kernel_init_freeable+0xa64/0x1050
[ 137.182693] ? __pfx_kernel_init+0x10/0x10
[ 137.182693] kernel_init+0x24/0x160
[ 137.182693] ? __switch_to_asm+0x3e/0x70
[ 137.182693] ret_from_fork+0x40/0x80
[ 137.182693] ? __pfx_kernel_init+0x1
---truncated---

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: crypto: ccp - Corrige la desreferencia del puntero nulo en __sev_platform_shutdown_locked El dispositivo de la plataforma SEV se puede apagar con un psp_master nulo, por ejemplo, usando DEBUG_TEST_DRIVER_REMOVE. Encontrado usando KASAN: [ 137.148210] ccp 0000:23:00.1: dispositivo de habilitación (0000 -> 0002) [ 137.162647] ccp 0000:23:00.1: no hay colas de comandos disponibles [ 137.170598] ccp 0000:23:00.1: sev habilitado [ 13 7.174645 ] ccp 0000:23:00.1: psp habilitado [137.178890] falla de protección general, probablemente para dirección no canónica 0xdffffc000000001e: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC KASAN NOPTI [137.182693] KASAN: null-ptr-deref en rango [0x00 000000000000f0- 0x00000000000000f7] [ 137.182693] CPU: 93 PID: 1 Comm: swapper/0 No contaminado 6.8.0-rc1+ #311 [ 137.182693] RIP: 0010:__sev_platform_shutdown_locked+0x51/0x180 [ 137.1826 93] Código: 08 80 3c 08 00 0f 85 0e 01 00 00 48 8b 1d 67 b6 01 08 48 b8 00 00 00 00 00 fc ff df 48 8d bb f0 00 00 00 48 89 f9 48 c1 e9 03 <80> 3c 01 00 0f 85 fe 00 00 00 48 8b 9b f0 00 00 00 48 85 db 74 2c [ 137.182693] RSP: 0018:ffffc900000cf9b0 EFLAGS: 00010216 [ 137.182693] RAX: dffffc0000000000 RBX: 00000000000000000 RC X: 000000000000001e [ 137.182693] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 00000000000000f0 [ 137.182693] RBP: ffffc900000cf9c8 R0 8 : 0000000000000000 R09: ffffbfff58f5a66 [ 137.182693] R10: ffffc900000cf9c8 R11: ffffffffac7ad32f R12: ffff8881e5052c28 [ 137.182693] R13: ffff8881 e5052c28 R14: ffff8881758e43e8 R15: ffffffffac64abf8 [ 137.182693] FS: 0000000000000000(0000) GS:ffff889de7000000(0000) knlGS:00000000000000000 [ 137.182693] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 137.182693] CR2: 0000000000000000 CR3: 0000001cf7c7e000 CR4: 0000000000350ef0 [ 137.182693 ] Seguimiento de llamadas: [ 137.182693] [ 137.182693] ? show_regs+0x6c/0x80 [137.182693]? __die_body+0x24/0x70 [ 137.182693] ? die_addr+0x4b/0x80 [ 137.182693] ? exc_general_protection+0x126/0x230 [137.182693]? asm_exc_general_protection+0x2b/0x30 [137.182693]? __sev_platform_shutdown_locked+0x51/0x180 [ 137.182693] sev_firmware_shutdown.isra.0+0x1e/0x80 [ 137.182693] sev_dev_destroy+0x49/0x100 [ 137.182693] psp_dev_destroy+0x47/0 xb0 [ 137.182693] sp_destroy+0xbb/0x240 [ 137.182693] sp_pci_remove+0x45/0x60 [ 137.182693] pci_device_remove+0xaa/0x1d0 [ 137.182693] device_remove+0xc7/0x170 [ 137.182693]realmente_probe+0x374/0xbe0 [ 137.182693] ? srso_return_thunk+0x5/0x5f [ 137.182693] __driver_probe_device+0x199/0x460 [ 137.182693] driver_probe_device+0x4e/0xd0 [ 137.182693] __driver_attach+0x191/0x3d0 [ 137.18 2693] ? __pfx___driver_attach+0x10/0x10 [ 137.182693] bus_for_each_dev+0x100/0x190 [ 137.182693] ? __pfx_bus_for_each_dev+0x10/0x10 [137.182693]? __kasan_check_read+0x15/0x20 [ 137.182693] ? srso_return_thunk+0x5/0x5f [137.182693]? _raw_spin_unlock+0x27/0x50 [ 137.182693] driver_attach+0x41/0x60 [ 137.182693] bus_add_driver+0x2a8/0x580 [ 137.182693] driver_register+0x141/0x480 [ 137.182693] __pci_ registro_controlador+0x1d6/0x2a0 [137.182693]? srso_return_thunk+0x5/0x5f [137.182693]? esrt_sysfs_init+0x1cd/0x5d0 [137.182693]? __pfx_sp_mod_init+0x10/0x10 [ 137.182693] sp_pci_init+0x22/0x30 [ 137.182693] sp_mod_init+0x14/0x30 [ 137.182693] ? __pfx_sp_mod_init+0x10/0x10 [ 137.182693] do_one_initcall+0xd1/0x470 [ 137.182693] ? __pfx_do_one_initcall+0x10/0x10 [137.182693]? parameq+0x80/0xf0 [137.182693]? srso_return_thunk+0x5/0x5f [137.182693]? __kmalloc+0x3b0/0x4e0 [ 137.182693] ? kernel_init_freeable+0x92d/0x1050 [137.182693]? kasan_populate_vmalloc_pte+0x171/0x190 [137.182693]? srso_return_thunk+0x5/0x5f [137.182693] kernel_init_freeable+0xa64/0x1050 [137.182693]? __pfx_kernel_init+0x10/0x10 [ 137.182693] kernel_init+0x24/0x160 [ 137.182693] ? __switch_to_asm+0x3e/0x70 [ 137.182693] ret_from_fork+0x40/0x80 [ 137.182693] ? __pfx_kernel_init+0x1 ---truncado---

*Credits: N/A

CVSS Scores

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-02-19 CVE Reserved
2024-04-03 CVE Published
2024-04-04 EPSS Updated
2024-09-11 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (12)

URL	Tag	Source
https://git.kernel.org/stable/c/87af9b0b45666ca3dd6b10c0ece691c740b0f750	Vuln. Introduced
https://git.kernel.org/stable/c/f831d2882c843d44100016aeb4332e9c4b560805	Vuln. Introduced
https://git.kernel.org/stable/c/1b05ece0c931536c0a38a9385e243a7962e933f6	Vuln. Introduced
https://git.kernel.org/stable/c/fcb04178c05b88a98921e262da9f7cb21cfff118	Vuln. Introduced
https://git.kernel.org/stable/c/d87bbd10fc01b52c814113643f2707d2d10b0319	Vuln. Introduced
https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/58054faf3bd29cd0b949b77efcb6157f66f401ed	2024-02-23
https://git.kernel.org/stable/c/7535ec350a5f09b5756a7607f5582913f21200f4	2024-02-23
https://git.kernel.org/stable/c/8731fe001a60581794ed9cf65da8cd304846a6fb	2024-02-23
https://git.kernel.org/stable/c/88aa493f393d2ee38ac140e1f6ac1881346e85d4	2024-02-23
https://git.kernel.org/stable/c/b5909f197f3b26aebedca7d8ac7b688fd993a266	2024-02-23
https://git.kernel.org/stable/c/ccb88e9549e7cfd8bcd511c538f437e20026e983	2024-02-02

URL	Date	SRC

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"				>= 5.10.137 < 5.10.210 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10.137 < 5.10.210"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.15.61 < 5.15.149 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15.61 < 5.15.149"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 6.0 < 6.1.79 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.0 < 6.1.79"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 6.0 < 6.6.18 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.0 < 6.6.18"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 6.0 < 6.7.6 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.0 < 6.7.6"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 6.0 < 6.8 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.0 < 6.8"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				5.18.18 Search vendor "Linux" for product "Linux Kernel" and version "5.18.18"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				5.19.2 Search vendor "Linux" for product "Linux Kernel" and version "5.19.2"		en		Affected