CVE-2020-27670
published 2020-10-22CVE-2020-27670: 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…
PriorityP335high7.8CVSS 3.1
AVLACHPRLUINSCCHIHAH
EPSS
0.25%
16.8th percentile
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.
Affected
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | xen | < xen 4.14.0+80-gd101b417b7-1 (bookworm) | xen 4.14.0+80-gd101b417b7-1 (bookworm) |
| fedoraproject | fedora | — | — |
| opensuse | leap | — | — |
| opensuse | leap | — | — |
| xen | xen | <= 4.14.0 | — |
| xen | xen | >= 0 < 4.14.0+80-gd101b417b7-1 | 4.14.0+80-gd101b417b7-1 |
| xen | xen | >= 0 < 4.14.0+80-gd101b417b7-1 | 4.14.0+80-gd101b417b7-1 |
| xen | xen | >= 0 < 4.14.0+80-gd101b417b7-1 | 4.14.0+80-gd101b417b7-1 |
| xen | xen | >= 0 < 4.14.0+80-gd101b417b7-1 | 4.14.0+80-gd101b417b7-1 |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
nvdv2.06.9MEDIUMAV:L/AC:M/Au:N/C:C/I:C/A:C
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
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GHSA
GHSA-5mqq-gcv3-gmvf: An issue was discovered in Xen through 4
ghsa_unreviewed·2022-05-24
CVE-2020-27670 [HIGH] CWE-345 GHSA-5mqq-gcv3-gmvf: An issue was discovered in Xen through 4
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.
OSV
CVE-2020-27670: An issue was discovered in Xen through 4
osv·2020-10-22·CVSS 7.8
CVE-2020-27670 [HIGH] CVE-2020-27670: An issue was discovered in Xen through 4
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.
Red Hat
xen: unsafe AMD IOMMU page table updates (XSA-347)
vendor_redhat·2020-10-20·CVSS 7.8
CVE-2020-27670 [HIGH] CWE-567 xen: unsafe AMD IOMMU page table updates (XSA-347)
xen: unsafe AMD IOMMU page table updates (XSA-347)
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.
A flaw was found in Xen in the AMD IOMMU page table updates. This flaw allows a malicious guest to cause a denial of service, host data corruption, or potential privilege escalation. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Statement: This flaw has been rated as having a security impact of Moderate, and is not currently planned to be addressed in future updates of Red Hat Enterprise Linux 5. Red Hat Enterprise Linux 5 is now in the Extended Life
Debian
CVE-2020-27670: xen - An issue was discovered in Xen through 4.14.x allowing x86 guest OS users to cau...
vendor_debian·2020·CVSS 7.8
CVE-2020-27670 [HIGH] CVE-2020-27670: xen - An issue was discovered in Xen through 4.14.x allowing x86 guest OS users to cau...
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.
Scope: local
bookworm: resolved (fixed in 4.14.0+80-gd101b417b7-1)
bullseye: resolved (fixed in 4.14.0+80-gd101b417b7-1)
forky: resolved (fixed in 4.14.0+80-gd101b417b7-1)
sid: resolved (fixed in 4.14.0+80-gd101b417b7-1)
trixie: resolved (fixed in 4.14.0+80-gd101b417b7-1)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2020-27670 xen: unsafe AMD IOMMU page table updates (XSA-347)
bugzilla·2020-10-23·CVSS 7.8
CVE-2020-27670 [HIGH] CVE-2020-27670 xen: unsafe AMD IOMMU page table updates (XSA-347)
CVE-2020-27670 xen: unsafe AMD IOMMU page table updates (XSA-347)
An issue was discovered in all versions of Xen 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.
Discussion:
Created xen tracking bugs for this issue:
Affects: fedora-all [bug 1891088]
---
Acknowledgments:
Name: the Xen project
---
External References:
https://xenbits.xen.org/xsa/advisory-347.html
---
Upstream fix:
https://xenbits.xen.org/xsa/xsa347/xsa347-1.patch
https://xenbits.xen.org/xsa/xsa347/xsa347-2.patch
https://xenbits.xen.org/xsa/xsa347/xsa347-3.patch
---
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):
https://access
Bugzilla
CVE-2020-27670 xen: unsafe AMD IOMMU page table updates (XSA-347) [fedora-all]
bugzilla·2020-10-23·CVSS 7.8
CVE-2020-27670 [HIGH] CVE-2020-27670 xen: unsafe AMD IOMMU page table updates (XSA-347) [fedora-all]
CVE-2020-27670 xen: unsafe AMD IOMMU page table updates (XSA-347) [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported version
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.htmlhttp://www.openwall.com/lists/oss-security/2021/01/19/9http://xenbits.xen.org/xsa/advisory-347.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/https://security.gentoo.org/glsa/202011-06https://www.debian.org/security/2020/dsa-4804https://xenbits.xen.org/xsa/advisory-347.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.htmlhttp://www.openwall.com/lists/oss-security/2021/01/19/9http://xenbits.xen.org/xsa/advisory-347.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/https://security.gentoo.org/glsa/202011-06https://www.debian.org/security/2020/dsa-4804https://xenbits.xen.org/xsa/advisory-347.html
2020-10-22
Published