CVE-2020-25284

kernel: incomplete permission checking for access to rbd devices

Severity Score

4.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The rbd block device driver in drivers/block/rbd.c in the Linux kernel through 5.8.9 used incomplete permission checking for access to rbd devices, which could be leveraged by local attackers to map or unmap rbd block devices, aka CID-f44d04e696fe.

El controlador de dispositivo del bloque rbd en el archivo drivers/block/rbd.c en el kernel de Linux versiones hasta 5.8.9, usaba una comprobación incompleta de permisos para acceder a dispositivos rbd, que podrían ser aprovechados por atacantes locales para asignar o desasignar dispositivos de bloque rbd, también se conoce como CID-f44d04e696fe

A flaw was found in the capabilities check of the rados block device functionality in the Linux kernel. Incorrect capability checks could alllow a local user with root priviledges (but no capabilities) to add or remove Rados Block Devices from the system.

*Credits: N/A

Attack Vector

Local

Attack Complexity

High

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Local

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-09-13 CVE Reserved
2020-09-13 CVE Published
2023-03-08 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-732: Incorrect Permission Assignment for Critical Resource
CWE-863: Incorrect Authorization

CAPEC

References (9)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html	Mailing List
https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html	Mailing List
https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html	Mailing List
https://twitter.com/grsecurity/status/1304537507560919041	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f44d04e696feaf13d192d942c4f14ad2e117065a	2022-04-28

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00001.html	2022-04-28
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.html	2022-04-28
https://access.redhat.com/security/cve/CVE-2020-25284	2021-05-18
https://bugzilla.redhat.com/show_bug.cgi?id=1882594	2021-05-18

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"				< 5.8.9 Search vendor "Linux" for product "Linux Kernel" and version " < 5.8.9"		-		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"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				15.1 Search vendor "Opensuse" for product "Leap" and version "15.1"		-		Affected