CVE-2020-27670
First published: Thu Oct 22 2020(Updated: )
An issue was discovered in Xen through 4.14.x allowing x86 guest OS users to cause a denial of service (data corruption), cause a data leak, or possibly gain privileges because an AMD IOMMU page-table entry can be half-updated.
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 | <=4.14.0 | |
| openSUSE Leap | =15.1 | |
| openSUSE Leap | =15.2 | |
| Fedoraproject Fedora | =31 | |
| Debian Debian Linux | =10.0 |
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Reference Links
- https://xenbits.xen.org/xsa/advisory-347.html
- https://security-tracker.debian.org/tracker/CVE-2020-27670
- 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/2021/01/19/9
- http://xenbits.xen.org/xsa/advisory-347.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
Frequently Asked Questions
What is the vulnerability ID for this issue in Xen?
The vulnerability ID for this issue in Xen is CVE-2020-27670.
What is the severity of CVE-2020-27670?
The severity of CVE-2020-27670 is high with a CVSS score of 7.8.
How can x86 guest OS users exploit CVE-2020-27670?
x86 guest OS users can exploit CVE-2020-27670 to cause a denial of service (data corruption), cause a data leak, or possibly gain privileges.
Which versions of Xen are affected by CVE-2020-27670?
Xen versions through 4.14.x are affected by CVE-2020-27670.
Where can I find more information about CVE-2020-27670?
You can find more information about CVE-2020-27670 at the following references: [Xen Advisory 347](https://xenbits.xen.org/xsa/advisory-347.html), [Debian Security Tracker](https://security-tracker.debian.org/tracker/CVE-2020-27670), [openSUSE Security Announce](http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.html).
- collector/security-tracker-debian
- collector/nvd-index
- agent/references
- agent/type
- package-manager/debian
- vendor/xen
- canonical/xen xen
- version/xen xen/4.14.0
- vendor/opensuse
- canonical/opensuse leap
- version/opensuse leap/15.1
- version/opensuse leap/15.2
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/31
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/10.0