CVE-2024-27011

netfilter: nf_tables: fix memleak in map from abort path

Severity Score

5.5

*CVSS v3.1

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:

netfilter: nf_tables: fix memleak in map from abort path

The delete set command does not rely on the transaction object for
element removal, therefore, a combination of delete element + delete set
from the abort path could result in restoring twice the refcount of the
mapping.

Check for inactive element in the next generation for the delete element
command in the abort path, skip restoring state if next generation bit
has been already cleared. This is similar to the activate logic using
the set walk iterator.

[ 6170.286929] ------------[ cut here ]------------
[ 6170.286939] WARNING: CPU: 6 PID: 790302 at net/netfilter/nf_tables_api.c:2086 nf_tables_chain_destroy+0x1f7/0x220 [nf_tables]
[ 6170.287071] Modules linked in: [...]
[ 6170.287633] CPU: 6 PID: 790302 Comm: kworker/6:2 Not tainted 6.9.0-rc3+ #365
[ 6170.287768] RIP: 0010:nf_tables_chain_destroy+0x1f7/0x220 [nf_tables]
[ 6170.287886] Code: df 48 8d 7d 58 e8 69 2e 3b df 48 8b 7d 58 e8 80 1b 37 df 48 8d 7d 68 e8 57 2e 3b df 48 8b 7d 68 e8 6e 1b 37 df 48 89 ef eb c4 <0f> 0b 48 83 c4 08 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc 0f
[ 6170.287895] RSP: 0018:ffff888134b8fd08 EFLAGS: 00010202
[ 6170.287904] RAX: 0000000000000001 RBX: ffff888125bffb28 RCX: dffffc0000000000
[ 6170.287912] RDX: 0000000000000003 RSI: ffffffffa20298ab RDI: ffff88811ebe4750
[ 6170.287919] RBP: ffff88811ebe4700 R08: ffff88838e812650 R09: fffffbfff0623a55
[ 6170.287926] R10: ffffffff8311d2af R11: 0000000000000001 R12: ffff888125bffb10
[ 6170.287933] R13: ffff888125bffb10 R14: dead000000000122 R15: dead000000000100
[ 6170.287940] FS: 0000000000000000(0000) GS:ffff888390b00000(0000) knlGS:0000000000000000
[ 6170.287948] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 6170.287955] CR2: 00007fd31fc00710 CR3: 0000000133f60004 CR4: 00000000001706f0
[ 6170.287962] Call Trace:
[ 6170.287967] <TASK>
[ 6170.287973] ? __warn+0x9f/0x1a0
[ 6170.287986] ? nf_tables_chain_destroy+0x1f7/0x220 [nf_tables]
[ 6170.288092] ? report_bug+0x1b1/0x1e0
[ 6170.287986] ? nf_tables_chain_destroy+0x1f7/0x220 [nf_tables]
[ 6170.288092] ? report_bug+0x1b1/0x1e0
[ 6170.288104] ? handle_bug+0x3c/0x70
[ 6170.288112] ? exc_invalid_op+0x17/0x40
[ 6170.288120] ? asm_exc_invalid_op+0x1a/0x20
[ 6170.288132] ? nf_tables_chain_destroy+0x2b/0x220 [nf_tables]
[ 6170.288243] ? nf_tables_chain_destroy+0x1f7/0x220 [nf_tables]
[ 6170.288366] ? nf_tables_chain_destroy+0x2b/0x220 [nf_tables]
[ 6170.288483] nf_tables_trans_destroy_work+0x588/0x590 [nf_tables]

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: netfilter: nf_tables: corrige memleak en el mapa de la ruta de aborto El comando eliminar conjunto no depende del objeto de transacción para la eliminación de elementos, por lo tanto, se puede usar una combinación de eliminar elemento + eliminar conjunto del abortar la ruta podría resultar en restaurar el doble del recuento del mapeo. Verifique si hay elementos inactivos en la próxima generación para el comando de eliminación de elementos en la ruta de cancelación, omita el estado de restauración si el bit de próxima generación ya se ha borrado. Esto es similar a la lógica de activación usando el iterador de caminata establecido. [6170.286929] ------------[ cortar aquí ]------------ [ 6170.286939] ADVERTENCIA: CPU: 6 PID: 790302 en net/netfilter/nf_tables_api.c :2086 nf_tables_chain_destroy+0x1f7/0x220 [nf_tables] [ 6170.287071] Módulos vinculados en: [...] [ 6170.287633] CPU: 6 PID: 790302 Comm: kworker/6:2 No contaminado 6.9.0-rc3+ #365 [ 768] RIP: 0010:nf_tables_chain_destroy+0x1f7/0x220 [nf_tables] [6170.287886] Código: df 48 8d 7d 58 e8 69 2e 3b df 48 8b 7d 58 e8 80 1b 37 df 48 8d 7d 68 e8 57 2e 3b gl 48 8b 7d 68 e8 6e 1b 37 df 48 89 ef eb c4 <0f> 0b 48 83 c4 08 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc 0f [ 6170.287895] RSP: 0018:ffff888134b8fd08 LAGS: 00010202 [6170.287904] RAX: 0000000000000001 RBX: ffff888125bffb28 RCX: dffffc0000000000 [ 6170.287912] RDX: 0000000000000003 RSI: ffffffffa20298ab RDI: ffff88811ebe4750 [ 6170.287919] RBP: 811ebe4700 R08: ffff88838e812650 R09: ffffbfff0623a55 [ 6170.287926] R10: ffffffff8311d2af R11: 00000000000000001 R12: ffff888125bffb10 [ 6170.287 933] R13: ffff888125bffb10 R14: muerto000000000122 R15: muerto000000000100 [ 6170.287940] FS: 0000000000000000(0000) GS:ffff888390b00000(0000) knlGS:0000000000000000 [ 6170.287 948] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 6170.287955] CR2: 00007fd31fc00710 CR3: 0000000133f60004 CR4: 00000000001706f0 [ 6170.287962] Seguimiento de llamadas: [ 6170.287967] [ 6170.287973] ? __advertir+0x9f/0x1a0 [6170.287986] ? nf_tables_chain_destroy+0x1f7/0x220 [nf_tables] [6170.288092]? report_bug+0x1b1/0x1e0 [6170.287986]? nf_tables_chain_destroy+0x1f7/0x220 [nf_tables] [6170.288092]? report_bug+0x1b1/0x1e0 [6170.288104]? handle_bug+0x3c/0x70 [6170.288112]? exc_invalid_op+0x17/0x40 [6170.288120]? asm_exc_invalid_op+0x1a/0x20 [6170.288132]? nf_tables_chain_destroy+0x2b/0x220 [nf_tables] [6170.288243]? nf_tables_chain_destroy+0x1f7/0x220 [nf_tables] [6170.288366]? nf_tables_chain_destroy+0x2b/0x220 [nf_tables] [ 6170.288483] nf_tables_trans_destroy_work+0x588/0x590 [nf_tables]

*Credits: N/A

CVSS Scores

Red Hatv3.1 5.5

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-02-19 CVE Reserved
2024-05-01 CVE Published
2024-05-13 EPSS Updated
2024-08-02 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (5)

URL	Tag	Source
https://git.kernel.org/stable/c/591054469b3eef34bc097c30fae8ededddf8d796	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/49d0e656d19dfb2d4d7c230e4a720d37b3decff6	2024-04-27
https://git.kernel.org/stable/c/86a1471d7cde792941109b93b558b5dc078b9ee9	2024-04-18

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2024-27011	2024-08-08
https://bugzilla.redhat.com/show_bug.cgi?id=2278277	2024-08-08

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"				>= 4.12 < 6.8.8 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.12 < 6.8.8"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.12 < 6.9 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.12 < 6.9"		en		Affected