CVE-2020-27671

high
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

An issue was discovered in Xen through 4.14.x allowing x86 HVM and PVH guest OS users to cause a denial of service (data corruption), cause a data leak, or possibly gain privileges because coalescing of per-page IOMMU TLB flushes is mishandled.

References

https://xenbits.xen.org/xsa/advisory-346.html

http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.html

http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.html

https://security.gentoo.org/glsa/202011-06

https://lists.fedoraproject.org/archives/list/[email protected]/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/

https://www.debian.org/security/2020/dsa-4804

http://www.openwall.com/lists/oss-security/2021/01/19/8

http://xenbits.xen.org/xsa/advisory-346.html

Details

Source: MITRE

Published: 2020-10-22

Updated: 2021-07-21

Type: CWE-269

Risk Information

CVSS v2

Base Score: 6.9

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

Impact Score: 10

Exploitability Score: 3.4

Severity: MEDIUM

CVSS v3

Base Score: 7.8

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

Impact Score: 6

Exploitability Score: 1.1

Severity: HIGH

Vulnerable Software

Configuration 1

OR

cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* versions from 4.2.0 to 4.14.0 (inclusive)

Configuration 2

OR

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

Tenable Plugins

View all (19 total)

IDNameProductFamilySeverity
150513SUSE SLES11 Security Update : xen (SUSE-SU-2020:14557-1)NessusSuSE Local Security Checks
high
150180OracleVM 3.4 : xen (OVMSA-2021-0014)NessusOracleVM Local Security Checks
high
144976Xen mishandle IOMMU TLB flushes DoS (XSA-346)NessusMisc.
high
144102SUSE SLES12 Security Update : xen (SUSE-SU-2020:3742-1)NessusSuSE Local Security Checks
high
143878SUSE SLED15 / SLES15 Security Update : xen (SUSE-SU-2020:3615-1)NessusSuSE Local Security Checks
high
143861SUSE SLED15 / SLES15 Security Update : xen (SUSE-SU-2020:3611-1)NessusSuSE Local Security Checks
high
143824SUSE SLES12 Security Update : xen (SUSE-SU-2020:3653-1)NessusSuSE Local Security Checks
high
143820SUSE SLES12 Security Update : xen (SUSE-SU-2020:3050-1)NessusSuSE Local Security Checks
high
143813SUSE SLES12 Security Update : xen (SUSE-SU-2020:3088-1)NessusSuSE Local Security Checks
high
143811SUSE SLED15 / SLES15 Security Update : xen (SUSE-SU-2020:3051-1)NessusSuSE Local Security Checks
high
143674SUSE SLES12 Security Update : xen (SUSE-SU-2020:3631-1)NessusSuSE Local Security Checks
high
143670SUSE SLED15 / SLES15 Security Update : xen (SUSE-SU-2020:3049-1)NessusSuSE Local Security Checks
high
143538openSUSE Security Update : xen (openSUSE-2020-2192)NessusSuSE Local Security Checks
high
143506openSUSE Security Update : xen (openSUSE-2020-2162)NessusSuSE Local Security Checks
high
143500Debian DSA-4804-1 : xen - security updateNessusDebian Local Security Checks
high
143135Fedora 31 : xen (2020-6dd36a716c)NessusFedora Local Security Checks
high
142854GLSA-202011-06 : Xen: Multiple vulnerabilitiesNessusGentoo Local Security Checks
high
142526openSUSE Security Update : xen (openSUSE-2020-1844)NessusSuSE Local Security Checks
high
142185openSUSE Security Update : xen (openSUSE-2020-1783)NessusSuSE Local Security Checks
high