CVE-2024-26754

gtp: fix use-after-free and null-ptr-deref in gtp_genl_dump_pdp()

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:

gtp: fix use-after-free and null-ptr-deref in gtp_genl_dump_pdp()

The gtp_net_ops pernet operations structure for the subsystem must be
registered before registering the generic netlink family.

Syzkaller hit 'general protection fault in gtp_genl_dump_pdp' bug:

general protection fault, probably for non-canonical address
0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 1 PID: 5826 Comm: gtp Not tainted 6.8.0-rc3-std-def-alt1 #1
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.0-alt1 04/01/2014
RIP: 0010:gtp_genl_dump_pdp+0x1be/0x800 [gtp]
Code: c6 89 c6 e8 64 e9 86 df 58 45 85 f6 0f 85 4e 04 00 00 e8 c5 ee 86
df 48 8b 54 24 18 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80>
3c 02 00 0f 85 de 05 00 00 48 8b 44 24 18 4c 8b 30 4c 39 f0 74
RSP: 0018:ffff888014107220 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88800fcda588 R14: 0000000000000001 R15: 0000000000000000
FS: 00007f1be4eb05c0(0000) GS:ffff88806ce80000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1be4e766cf CR3: 000000000c33e000 CR4: 0000000000750ef0
PKRU: 55555554
Call Trace:
<TASK>
? show_regs+0x90/0xa0
? die_addr+0x50/0xd0
? exc_general_protection+0x148/0x220
? asm_exc_general_protection+0x22/0x30
? gtp_genl_dump_pdp+0x1be/0x800 [gtp]
? __alloc_skb+0x1dd/0x350
? __pfx___alloc_skb+0x10/0x10
genl_dumpit+0x11d/0x230
netlink_dump+0x5b9/0xce0
? lockdep_hardirqs_on_prepare+0x253/0x430
? __pfx_netlink_dump+0x10/0x10
? kasan_save_track+0x10/0x40
? __kasan_kmalloc+0x9b/0xa0
? genl_start+0x675/0x970
__netlink_dump_start+0x6fc/0x9f0
genl_family_rcv_msg_dumpit+0x1bb/0x2d0
? __pfx_genl_family_rcv_msg_dumpit+0x10/0x10
? genl_op_from_small+0x2a/0x440
? cap_capable+0x1d0/0x240
? __pfx_genl_start+0x10/0x10
? __pfx_genl_dumpit+0x10/0x10
? __pfx_genl_done+0x10/0x10
? security_capable+0x9d/0xe0

En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: gtp: corrige use-after-free y null-ptr-deref en gtp_genl_dump_pdp() La estructura de operaciones pernet gtp_net_ops para el subSYSTEM debe registrarse antes de registrar la familia netlink genérica. Syzkaller encontró el error 'fallo de protección general en gtp_genl_dump_pdp': fallo de protección general, probablemente para la dirección no canónica 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: null-ptr-deref en el rango [0x0000000000000010-0x00000000000000 017] CPU: 1 PID : 5826 Comm: gtp Not tainted 6.8.0-rc3-std-def-alt1 #1 Nombre del hardware: PC estándar QEMU (Q35 + ICH9, 2009), BIOS 1.16.0-alt1 01/04/2014 RIP: 0010:gtp_genl_dump_pdp +0x1be/0x800 [gtp] Código: c6 89 c6 e8 64 e9 86 df 58 45 85 f6 0f 85 4e 04 00 00 e8 c5 ee 86 df 48 8b 54 24 18 48 b8 00 00 00 00 00 fc ff df 48 c1 e un 03 <80> 3c 02 00 0f 85 de 05 00 00 48 8b 44 24 18 4c 8b 30 4c 39 f0 74 RSP: 0018:ffff888014107220 EFLAGS: 00010202 RAX: dffffc0000000000 RBX : 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000000000000 R11: 0000000000000000 R12 : 0000000000000000 R13: ffff88800fcda588 R14: 0000000000000001 R15: 0000000000000000 FS: 00007f1be4eb05c0(0000) GS:ffff88806ce80000(0000) kn lGS:0000000000000000 CS: 0010 DS: 0000 ES : 0000 CR0: 0000000080050033 CR2: 00007f1be4e766cf CR3: 000000000c33e000 CR4: 0000000000750ef0 PKRU: 55555554 Seguimiento de llamadas: ? show_regs+0x90/0xa0? die_addr+0x50/0xd0? exc_general_protection+0x148/0x220? asm_exc_general_protection+0x22/0x30? gtp_genl_dump_pdp+0x1be/0x800 [gtp] ? __alloc_skb+0x1dd/0x350 ? __pfx___alloc_skb+0x10/0x10 genl_dumpit+0x11d/0x230 netlink_dump+0x5b9/0xce0 ? lockdep_hardirqs_on_prepare+0x253/0x430? __pfx_netlink_dump+0x10/0x10 ? kasan_save_track+0x10/0x40? __kasan_kmalloc+0x9b/0xa0 ? genl_start+0x675/0x970 __netlink_dump_start+0x6fc/0x9f0 genl_family_rcv_msg_dumpit+0x1bb/0x2d0 ? __pfx_genl_family_rcv_msg_dumpit+0x10/0x10 ? genl_op_from_small+0x2a/0x440? cap_capaz+0x1d0/0x240 ? __pfx_genl_start+0x10/0x10? __pfx_genl_dumpit+0x10/0x10 ? __pfx_genl_done+0x10/0x10 ? seguridad_capaz+0x9d/0xe0

*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
2024-12-19 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (11)

URL	Tag	Source
https://git.kernel.org/stable/c/459aa660eb1d8ce67080da1983bb81d716aa5a69	Vuln. Introduced
https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/f0ecdfa679189d26aedfe24212d4e69e42c2c861	2024-03-01
https://git.kernel.org/stable/c/f8cbd1791900b5d96466eede8e9439a5b9ca4de7	2024-03-01
https://git.kernel.org/stable/c/2e534fd15e5c2ca15821c897352cf0e8a3e30dca	2024-03-01
https://git.kernel.org/stable/c/a576308800be28f2eaa099e7caad093b97d66e77	2024-03-01
https://git.kernel.org/stable/c/3963f16cc7643b461271989b712329520374ad2a	2024-03-01
https://git.kernel.org/stable/c/ba6b8b02a3314e62571a540efa96560888c5f03e	2024-03-01
https://git.kernel.org/stable/c/5013bd54d283eda5262c9ae3bcc966d01daf8576	2024-03-01
https://git.kernel.org/stable/c/136cfaca22567a03bbb3bf53a43d8cb5748b80ec	2024-02-21

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"				>= 4.7 < 4.19.308 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 4.19.308"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.7 < 5.4.270 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 5.4.270"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.7 < 5.10.211 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 5.10.211"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.7 < 5.15.150 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 5.15.150"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.7 < 6.1.80 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 6.1.80"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.7 < 6.6.19 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 6.6.19"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.7 < 6.7.7 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 6.7.7"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.7 < 6.8 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 6.8"		en		Affected