CVE-2022-48643

netfilter: nf_tables: fix nft_counters_enabled underflow at nf_tables_addchain()

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:

netfilter: nf_tables: fix nft_counters_enabled underflow at nf_tables_addchain()

syzbot is reporting underflow of nft_counters_enabled counter at
nf_tables_addchain() [1], for commit 43eb8949cfdffa76 ("netfilter:
nf_tables: do not leave chain stats enabled on error") missed that
nf_tables_chain_destroy() after nft_basechain_init() in the error path of
nf_tables_addchain() decrements the counter because nft_basechain_init()
makes nft_is_base_chain() return true by setting NFT_CHAIN_BASE flag.

Increment the counter immediately after returning from
nft_basechain_init().

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: nf_tables: corrige el desbordamiento de nft_counters_enabled en nf_tables_addchain() syzbot informa el desbordamiento del contador nft_counters_enabled en nf_tables_addchain() [1], para el commit 43eb8949cfdffa76 ("netfilter: nf_tables: no salir estadísticas de cadena habilitadas en caso de error") pasó por alto que nf_tables_chain_destroy() después de nft_basechain_init() en la ruta de error de nf_tables_addchain() disminuye el contador porque nft_basechain_init() hace que nft_is_base_chain() devuelva verdadero al configurar el indicador NFT_CHAIN_BASE. Incrementa el contador inmediatamente después de regresar de nft_basechain_init().

*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

2024-02-25 CVE Reserved
2024-04-28 CVE Published
2024-04-29 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (7)

URL	Tag	Source
https://git.kernel.org/stable/c/c907dfe4eaca9665694a0340de1458a093abe354	Vuln. Introduced
https://git.kernel.org/stable/c/6d7ddee503951641f3ec6f0e3269446970bbcdab	Vuln. Introduced
https://git.kernel.org/stable/c/98a621ef45e3605c7487f7fa6fec7df94697d6a2	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/710e3f526bd23a0d33435dedc52c3144de284378	2022-09-28
https://git.kernel.org/stable/c/91aa52652f4b37089aff3cb53e83049d826fef6d	2022-09-28
https://git.kernel.org/stable/c/8bcad2a931313aeba076b76922d5813ef97d0a91	2022-09-28
https://git.kernel.org/stable/c/921ebde3c0d22c8cba74ce8eb3cc4626abff1ccd	2022-09-20

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"				>= 5.10.140 < 5.10.146 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10.140 < 5.10.146"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.15.64 < 5.15.71 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15.64 < 5.15.71"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.19.6 < 5.19.12 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.19.6 < 5.19.12"		en		Affected