CVE-2021-4197

kernel: cgroup: Use open-time creds and namespace for migration perm checks

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An unprivileged write to the file handler flaw in the Linux kernel's control groups and namespaces subsystem was found in the way users have access to some less privileged process that are controlled by cgroups and have higher privileged parent process. It is actually both for cgroup2 and cgroup1 versions of control groups. A local user could use this flaw to crash the system or escalate their privileges on the system.

Se encontró un fallo de escritura no privilegiado en el manejador de archivos en el subsistema de grupos de control y espacios de nombres del kernel de Linux en la forma en que los usuarios presentan acceso a algunos procesos menos privilegiados que son controlados por cgroups y presentan procesos padres con mayores privilegios. En realidad se trata de las versiones cgroup2 y cgroup1 de los grupos de control. Un usuario local podría usar este fallo para bloquear el sistema o escalar sus privilegios en el sistema

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2022-01-03 CVE Reserved
2022-03-22 CVE Published
2023-03-08 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-287: Improper Authentication

CAPEC

References (7)

URL	Tag	Source
https://lore.kernel.org/lkml/20211209214707.805617-1-tj%40kernel.org/T	X_refsource_misc
https://security.netapp.com/advisory/ntap-20220602-0006	Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.html	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://bugzilla.redhat.com/show_bug.cgi?id=2035652	2022-07-19
https://www.debian.org/security/2022/dsa-5127	2023-11-07
https://www.debian.org/security/2022/dsa-5173	2023-11-07
https://access.redhat.com/security/cve/CVE-2021-4197	2022-07-19

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Netapp Search vendor "Netapp"	H300s Firmware Search vendor "Netapp" for product "H300s Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H300s Search vendor "Netapp" for product "H300s"	-	-	Safe
Netapp Search vendor "Netapp"	H500s Firmware Search vendor "Netapp" for product "H500s Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H500s Search vendor "Netapp" for product "H500s"	-	-	Safe
Netapp Search vendor "Netapp"	H700s Firmware Search vendor "Netapp" for product "H700s Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H700s Search vendor "Netapp" for product "H700s"	-	-	Safe
Netapp Search vendor "Netapp"	H410s Firmware Search vendor "Netapp" for product "H410s Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H410s Search vendor "Netapp" for product "H410s"	-	-	Safe
Netapp Search vendor "Netapp"	H410c Firmware Search vendor "Netapp" for product "H410c Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H410c Search vendor "Netapp" for product "H410c"	-	-	Safe
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.2 < 4.14.276 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.2 < 4.14.276"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.15 < 4.19.238 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 4.19.238"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.20 < 5.4.189 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.20 < 5.4.189"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.5 < 5.10.111 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.5 < 5.10.111"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.11 < 5.15.14 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.11 < 5.15.14"		-		Affected
Oracle Search vendor "Oracle"		Communications Cloud Native Core Binding Support Function Search vendor "Oracle" for product "Communications Cloud Native Core Binding Support Function"				22.1.1 Search vendor "Oracle" for product "Communications Cloud Native Core Binding Support Function" and version "22.1.1"		-		Affected
Oracle Search vendor "Oracle"		Communications Cloud Native Core Binding Support Function Search vendor "Oracle" for product "Communications Cloud Native Core Binding Support Function"				22.1.3 Search vendor "Oracle" for product "Communications Cloud Native Core Binding Support Function" and version "22.1.3"		-		Affected
Oracle Search vendor "Oracle"		Communications Cloud Native Core Binding Support Function Search vendor "Oracle" for product "Communications Cloud Native Core Binding Support Function"				22.2.0 Search vendor "Oracle" for product "Communications Cloud Native Core Binding Support Function" and version "22.2.0"		-		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
Broadcom Search vendor "Broadcom"		Brocade Fabric Operating System Firmware Search vendor "Broadcom" for product "Brocade Fabric Operating System Firmware"				-		-		Affected