CVE-2020-27672

Common vulnerabilities & exposures (CVE)

CVE database CVE database blogpost Release & EoL database

Published at: - 22-10-2020 11:15

Last modified: - 26-04-2022 06:23

Total changes: - 5

Description

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.

Common Vulnerability Scoring System (CVSS)

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

High

Attack complexity

Local

Attack vector

High

Availability

High

Confidentiality

High

Integrity

Low

Privileges required

Unchanged

Scope

None

User interaction

7.0

Base score

1.0

5.9

Exploitability score

Impact score

Verification logic

vendor=xen AND product=xen AND target_hardware=x86 AND versionEndIncluding=4.14.0 AND versionStartIncluding=3.2.0

vendor=fedoraproject AND product=fedora AND version=31

vendor=opensuse AND product=leap AND version=15.1

vendor=opensuse AND product=leap AND version=15.2

vendor=Debian AND product=debian_linux AND version=10.0

Reference

https://xenbits.xen.org/xsa/advisory-345.html
openSUSE-SU-2020:1783-Mailing List, Third Party Advisory
openSUSE-SU-2020:1844-Mailing List, Third Party Advisory
GLSA-202011-06-Third Party Advisory
FEDORA-2020-6dd36a716c-Mailing List, Third Party Advisory
DSA-4804-Third Party Advisory
[oss-security] 20210119 Xen Security Advisory 345 v4 (CVE-2020-27672) - x86: Race condition in Xen mapping code-Mailing List, Third Party Advisory
http://xenbits.xen.org/xsa/advisory-345.html

Keywords

CVE-2020-27672

Common vulnerabilities & exposures (CVE)

Description

Common Vulnerability Scoring System (CVSS)

Verification logic

Reference

NVD

CVE-2020-27672

CVE

Common vulnerabilities & exposures

CVSS

Common vulnerability scoring system

Security

Vulnerabilities

Exposures