CVE-2020-36322

kernel: fuse: fuse_do_getattr() calls make_bad_inode() in inappropriate situations

Severity Score

5.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An issue was discovered in the FUSE filesystem implementation in the Linux kernel before 5.10.6, aka CID-5d069dbe8aaf. fuse_do_getattr() calls make_bad_inode() in inappropriate situations, causing a system crash. NOTE: the original fix for this vulnerability was incomplete, and its incompleteness is tracked as CVE-2021-28950.

Se detectó un problema en la implementación del sistema de archivos FUSE en el kernel de Linux versiones anteriores a 510.6, también se conoce como CID-5d069dbe8aaf. La función fuse_do_getattr() llama a la función make_bad_inode() en situaciones inapropiadas, causando un bloqueo del sistema. NOTA: la solución original para esta vulnerabilidad estaba incompleta y su estado incompleto es registrado como CVE-2021-28950

A denial of service flaw was found in fuse_do_getattr in fs/fuse/dir.c in the kernel side of the FUSE filesystem in the Linux kernel. A local user could use this flaw to crash the system.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-04-14 CVE Reserved
2021-04-14 CVE Published
2023-03-08 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-459: Incomplete Cleanup

CAPEC

References (8)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html	Mailing List
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html	Mailing List
https://www.starwindsoftware.com/security/sw-20220816-0001	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5d069dbe8aaf2a197142558b6fb2978189ba3454	2022-10-14

URL	Date	SRC
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.6	2022-10-14
https://www.debian.org/security/2022/dsa-5096	2022-10-14
https://access.redhat.com/security/cve/CVE-2020-36322	2022-01-11
https://bugzilla.redhat.com/show_bug.cgi?id=1949560	2022-01-11

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"				< 5.10.6 Search vendor "Linux" for product "Linux Kernel" and version " < 5.10.6"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected
Starwindsoftware Search vendor "Starwindsoftware"		Starwind Virtual San Search vendor "Starwindsoftware" for product "Starwind Virtual San"				8 Search vendor "Starwindsoftware" for product "Starwind Virtual San" and version "8"		14338		Affected