CVE-2020-27672

An issue was discovered in Xen through 4.14.x allowing x86 guest OS users to cause a host OS denial of service, achieve data corruption, or possibly gain privileges by exploiting a race condition that leads to a use-after-free involving 2MiB and 1GiB superpages.

CVSS v3.0 7.0 HIGH
CVSS v2.0 6.9 MEDIUM

7.0^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 1.0 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.9^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 3.4 / Impact : 10.0

Access Vector LOCAL

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://xenbits.xen.org/xsa/advisory-345.html	Patch Vendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.html	Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.html	Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202011-06	Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/	Mailing List Third Party Advisory
https://www.debian.org/security/2020/dsa-4804	Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/01/19/7	Mailing List Third Party Advisory
http://xenbits.xen.org/xsa/advisory-345.html	Patch Vendor Advisory

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Configurations

Configuration 1 (hide)

cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:*

Configuration 2 (hide)

cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*

Configuration 3 (hide)

OR	cpe:2.3:o:opensuse:leap:15.1:::::::*
	cpe:2.3:o:opensuse:leap:15.2:::::::*

Configuration 4 (hide)

cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

Information

Published : 2020-10-22 14:15

Updated : 2022-04-26 09:23

NVD link : CVE-2020-27672

Mitre link : CVE-2020-27672

JSON object : View

CWE

CWE-416

Use After Free

CWE-362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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Products Affected

debian

debian_linux

xen

xen

fedoraproject

fedora

opensuse

leap

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