IM
IronMonkey Threat Research

CVE-2022-43945 HIGH

Published: 2022-11-04 | Last Modified: 2026-05-12 | Status: Modified

Description

The Linux kernel NFSD implementation prior to versions 5.19.17 and 6.0.2 are vulnerable to buffer overflow. NFSD tracks the number of pages held by each NFSD thread by combining the receive and send buffers of a remote procedure call (RPC) into a single array of pages. A client can force the send buffer to shrink by sending an RPC message over TCP with garbage data added at the end of the message. The RPC message with garbage data is still correctly formed according to the specification and is passed forward to handlers. Vulnerable code in NFSD is not expecting the oversized request and writes beyond the allocated buffer space. CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Additional Descriptions (1)

La implementación NFSD del kernel de Linux anterior a las versiones 5.19.17 y 6.0.2 es vulnerable al desbordamiento del búfer. NFSD rastrea el número de páginas retenidas por cada subproceso NFSD combinando los búferes de recepción y envío de una llamada a procedimiento remoto (RPC) en una única matriz de páginas. Un cliente puede forzar la reducción del búfer de envío enviando un mensaje RPC a través de TCP con datos basura agregados al final del mensaje. El mensaje RPC con datos basura todavía está formado correctamente según la especificación y se pasa a los controladores. El código vulnerable en NFSD no espera la solicitud de gran tamaño y escribe más allá del espacio de búfer asignado. CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS Metrics

Base Score: 7.5 (HIGH)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack VectorNETWORK
Attack ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
ScopeUNCHANGED
Confidentiality ImpactNONE
Integrity ImpactNONE
Availability ImpactHIGH

Source: [email protected]

Type: Primary

Exploitability Score: 3.9

Impact Score: 3.6

Weaknesses

Source Type Description
[email protected] Secondary
en CWE-131
[email protected] Primary
en CWE-770

Affected Products

Vendor Product Version Update Type
linux linux_kernel * <built-in method update of dict object at 0x7fd36b093200> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd36a0ecac0> Operating System
netapp active_iq_unified_manager - <built-in method update of dict object at 0x7fd34082b880> Application
netapp h300s_firmware - <built-in method update of dict object at 0x7fd310669640> Operating System
netapp h500s_firmware - <built-in method update of dict object at 0x7fd384211fc0> Operating System
netapp h700s_firmware - <built-in method update of dict object at 0x7fd3845f4c00> Operating System
netapp h410s_firmware - <built-in method update of dict object at 0x7fd36bee0c80> Operating System
netapp h410c_firmware - <built-in method update of dict object at 0x7fd36a0ede80> Operating System

Affected Configurations

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
No cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
No cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
No cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
No cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
No cpe:2.3:h:netapp:h410c:-:*:*:*:*:*:*:*

References