CVE-2020-27671
First published: Thu Oct 22 2020(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/xen | 4.11.4+107-gef32c7afa2-1 4.14.6-1 4.14.5+94-ge49571868d-1 4.17.1+2-gb773c48e36-1 4.17.2+55-g0b56bed864-1 | |
| Xen Xen | >=4.2.0<=4.14.0 | |
| openSUSE Leap | =15.1 | |
| openSUSE Leap | =15.2 | |
| Debian Debian Linux | =10.0 | |
| Fedoraproject Fedora | =31 |
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Reference Links
- https://xenbits.xen.org/xsa/advisory-346.html
- https://security-tracker.debian.org/tracker/CVE-2020-27671
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.html
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.html
- http://www.openwall.com/lists/oss-security/2021/01/19/8
- http://xenbits.xen.org/xsa/advisory-346.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/
- https://security.gentoo.org/glsa/202011-06
- https://www.debian.org/security/2020/dsa-4804
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/
Frequently Asked Questions
What is CVE-2020-27671?
CVE-2020-27671 is an issue discovered in Xen through 4.14.x that allows x86 HVM and PVH guest OS users to cause a denial of service, data corruption, data leak, or possibly gain privileges.
What software is affected by CVE-2020-27671?
Xen versions 4.11.4+107-gef32c7afa2-1, 4.14.6-1, 4.14.5+94-ge49571868d-1, 4.17.1+2-gb773c48e36-1, 4.17.2+55-g0b56bed864-1, and earlier versions are affected.
What is the severity of CVE-2020-27671?
The severity of CVE-2020-27671 is rated as high, with a CVSS score of 7.8.
How can CVE-2020-27671 be exploited?
CVE-2020-27671 can be exploited by x86 HVM and PVH guest OS users to cause a denial of service, data corruption, data leak, or potentially gain privileges.
How can I mitigate the impact of CVE-2020-27671?
To mitigate the impact of CVE-2020-27671, it is recommended to update to Xen version 4.14.6-1 or apply the appropriate patch provided by the vendor.
- collector/security-tracker-debian
- collector/nvd-index
- agent/references
- agent/severity
- agent/author
- agent/type
- agent/description
- agent/tags
- agent/event
- agent/remedy
- agent/last-modified-date
- agent/first-publish-date
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- package-manager/debian
- vendor/xen
- canonical/xen xen
- version/xen xen/4.2.0
- version/xen xen/4.14.0
- vendor/opensuse
- canonical/opensuse leap
- version/opensuse leap/15.1
- version/opensuse leap/15.2
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/10.0
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/31