CVE-2020-26541

2020-10-0200:00:00

ubuntu.com

6.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

6.9 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:M/Au:N/C:C/I:C/A:C

0.001 Low

EPSS

Percentile

18.8%

JSON

The Linux kernel through 5.8.13 does not properly enforce the Secure Boot
Forbidden Signature Database (aka dbx) protection mechanism. This affects
certs/blacklist.c and certs/system_keyring.c.

Bugs

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< anyUNKNOWN
ubuntu20.04noarchlinux< 5.4.0-92.103UNKNOWN
ubuntu21.04noarchlinux< 5.11.0-34.36UNKNOWN
ubuntu18.04noarchlinux-aws< anyUNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1061.64UNKNOWN
ubuntu21.04noarchlinux-aws< 5.11.0-1017.18UNKNOWN
ubuntu20.04noarchlinux-aws-5.11< 5.11.0-1017.18~20.04.1UNKNOWN
ubuntu18.04noarchlinux-aws-5.4< 5.4.0-1061.64~18.04.1UNKNOWN
ubuntu20.04noarchlinux-azure< 5.4.0-1065.68UNKNOWN
ubuntu21.04noarchlinux-azure< 5.11.0-1015.16UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	linux	< any	UNKNOWN
ubuntu	20.04	noarch	linux	< 5.4.0-92.103	UNKNOWN
ubuntu	21.04	noarch	linux	< 5.11.0-34.36	UNKNOWN
ubuntu	18.04	noarch	linux-aws	< any	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< 5.4.0-1061.64	UNKNOWN
ubuntu	21.04	noarch	linux-aws	< 5.11.0-1017.18	UNKNOWN
ubuntu	20.04	noarch	linux-aws-5.11	< 5.11.0-1017.18~20.04.1	UNKNOWN
ubuntu	18.04	noarch	linux-aws-5.4	< 5.4.0-1061.64~18.04.1	UNKNOWN
ubuntu	20.04	noarch	linux-azure	< 5.4.0-1065.68	UNKNOWN
ubuntu	21.04	noarch	linux-azure	< 5.11.0-1015.16	UNKNOWN