CVE-2021-20181

2021-02-0100:00:00

ubuntu.com

7.5 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

0.0005 Low

EPSS

Percentile

16.6%

JSON

A race condition flaw was found in the 9pfs server implementation of QEMU
up to and including 5.2.0. This flaw allows a malicious 9p client to cause
a use-after-free error, potentially escalating their privileges on the
system. The highest threat from this vulnerability is to confidentiality,
integrity as well as system availability.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchqemu< 1:2.11+dfsg-1ubuntu7.35UNKNOWN
ubuntu20.04noarchqemu< 1:4.2-3ubuntu6.12UNKNOWN
ubuntu20.10noarchqemu< 1:5.0-5ubuntu9.4UNKNOWN
ubuntu21.04noarchqemu< 1:5.2+dfsg-6ubuntu2UNKNOWN
ubuntu21.10noarchqemu< 1:5.2+dfsg-6ubuntu2UNKNOWN
ubuntu22.04noarchqemu< 1:5.2+dfsg-6ubuntu2UNKNOWN
ubuntu22.10noarchqemu< 1:5.2+dfsg-6ubuntu2UNKNOWN
ubuntu23.04noarchqemu< 1:5.2+dfsg-6ubuntu2UNKNOWN
ubuntu23.10noarchqemu< 1:5.2+dfsg-6ubuntu2UNKNOWN
ubuntu24.04noarchqemu< 1:5.2+dfsg-6ubuntu2UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	qemu	< 1:2.11+dfsg-1ubuntu7.35	UNKNOWN
ubuntu	20.04	noarch	qemu	< 1:4.2-3ubuntu6.12	UNKNOWN
ubuntu	20.10	noarch	qemu	< 1:5.0-5ubuntu9.4	UNKNOWN
ubuntu	21.04	noarch	qemu	< 1:5.2+dfsg-6ubuntu2	UNKNOWN
ubuntu	21.10	noarch	qemu	< 1:5.2+dfsg-6ubuntu2	UNKNOWN
ubuntu	22.04	noarch	qemu	< 1:5.2+dfsg-6ubuntu2	UNKNOWN
ubuntu	22.10	noarch	qemu	< 1:5.2+dfsg-6ubuntu2	UNKNOWN
ubuntu	23.04	noarch	qemu	< 1:5.2+dfsg-6ubuntu2	UNKNOWN
ubuntu	23.10	noarch	qemu	< 1:5.2+dfsg-6ubuntu2	UNKNOWN
ubuntu	24.04	noarch	qemu	< 1:5.2+dfsg-6ubuntu2	UNKNOWN