CVE-2024-27020

netfilter: nf_tables: Fix potential data-race in __nft_expr_type_get()

Severity Score

7.0

*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 potential data-race in __nft_expr_type_get()

nft_unregister_expr() can concurrent with __nft_expr_type_get(),
and there is not any protection when iterate over nf_tables_expressions
list in __nft_expr_type_get(). Therefore, there is potential data-race
of nf_tables_expressions list entry.

Use list_for_each_entry_rcu() to iterate over nf_tables_expressions
list in __nft_expr_type_get(), and use rcu_read_lock() in the caller
nft_expr_type_get() to protect the entire type query process.

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: netfilter: nf_tables: corrige una posible ejecución de datos en __nft_expr_type_get() nft_unregister_expr() puede concurrente con __nft_expr_type_get(), y no hay ninguna protección cuando se itera sobre la lista nf_tables_expressions en __nft_expr_type_get() . Por lo tanto, existe una posible ejecución de datos en la entrada de la lista nf_tables_expressions. Utilice list_for_each_entry_rcu() para iterar sobre la lista nf_tables_expressions en __nft_expr_type_get() y utilice rcu_read_lock() en el llamador nft_expr_type_get() para proteger todo el proceso de consulta de tipos.

A flaw was found in the Linux kernel. A potential data-race in the __nft_expr_type_get() function exists.

*Credits: N/A

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

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

Total

* Organization's Worst-case Scenario

Timeline

2024-02-19 CVE Reserved
2024-05-01 CVE Published
2024-05-24 EPSS Updated
2024-12-19 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CAPEC

References (13)

URL	Tag	Source
https://git.kernel.org/stable/c/ef1f7df9170dbd875ce198ba84e6ab80f6fc139e	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/939109c0a8e2a006a6cc8209e262d25065f4403a	2024-05-02
https://git.kernel.org/stable/c/b38a133d37fa421c8447b383d788c9cc6f5cb34c	2024-05-02
https://git.kernel.org/stable/c/934e66e231cff2b18faa2c8aad0b8cec13957e05	2024-05-02
https://git.kernel.org/stable/c/0b6de00206adbbfc6373b3ae38d2a6f197987907	2024-04-27
https://git.kernel.org/stable/c/8d56bad42ac4c43c6c72ddd6a654a2628bf839c5	2024-04-27
https://git.kernel.org/stable/c/a9ebf340d123ae12582210407f879d6a5a1bc25b	2024-04-27
https://git.kernel.org/stable/c/01f1a678b05ade4b1248019c2dcca773aebbeb7f	2024-04-27
https://git.kernel.org/stable/c/f969eb84ce482331a991079ab7a5c4dc3b7f89bf	2024-04-11

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2024-27020	2024-09-24
https://bugzilla.redhat.com/show_bug.cgi?id=2278256	2024-09-24

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"				>= 3.13 < 4.19.313 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 4.19.313"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.13 < 5.4.275 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 5.4.275"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.13 < 5.10.216 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 5.10.216"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.13 < 5.15.157 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 5.15.157"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.13 < 6.1.88 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 6.1.88"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.13 < 6.6.29 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 6.6.29"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.13 < 6.8.8 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 6.8.8"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.13 < 6.9 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 6.9"		en		Affected