CVE-2020-27672
published 2020-10-22CVE-2020-27672: 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…
PriorityP431high7CVSS 3.1
AVLACHPRLUINSUCHIHAH
EPSS
0.26%
17.9th percentile
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.
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 | >= 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 |
| xen | xen | 3.2.0 – 4.14.0 | — |
CVSS provenance
nvdv3.17.0HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv2.06.9MEDIUMAV:L/AC:M/Au:N/C:C/I:C/A:C
osv7.0HIGH
vendor_debian7.0HIGH
vendor_redhat7.0HIGH
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Red Hat
xen: x86: race condition in Xen mapping code (XSA-345)
vendor_redhat·2020-10-20·CVSS 7.0
CVE-2020-27672 [HIGH] CWE-362 xen: x86: race condition in Xen mapping code (XSA-345)
xen: x86: race condition in Xen mapping code (XSA-345)
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.
A race condition flaw was found in the Xen code responsible for handling the updating of the hypervisor's own page tables. 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: All Xen versions from 3.2 onwards are vulnerable. Red Hat Enterprise Linux 5 is not affected by this flaw, as it sh
Debian
CVE-2020-27672: xen - An issue was discovered in Xen through 4.14.x allowing x86 guest OS users to cau...
vendor_debian·2020·CVSS 7.0
CVE-2020-27672 [HIGH] CVE-2020-27672: 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 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.
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)
GHSA
GHSA-7627-2wxq-jrmh: An issue was discovered in Xen through 4
ghsa_unreviewed·2022-05-24
CVE-2020-27672 [HIGH] CWE-362 GHSA-7627-2wxq-jrmh: 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 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.
OSV
CVE-2020-27672: An issue was discovered in Xen through 4
osv·2020-10-22·CVSS 7.0
CVE-2020-27672 [HIGH] CVE-2020-27672: 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 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.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2020-27672 xen: x86: race condition in Xen mapping code (XSA-345)
bugzilla·2020-10-23·CVSS 7.0
CVE-2020-27672 [HIGH] CVE-2020-27672 xen: x86: race condition in Xen mapping code (XSA-345)
CVE-2020-27672 xen: x86: race condition in Xen mapping code (XSA-345)
An issue was discovered in versions of Xen from at least 3.2 onward, 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.
Discussion:
Created xen tracking bugs for this issue:
Affects: fedora-all [bug 1891097]
---
Acknowledgments:
Name: the Xen project
---
External References:
https://xenbits.xen.org/xsa/advisory-345.html
---
Upstream fix:
https://xenbits.xen.org/xsa/xsa345/0001-x86-mm-Refactor-map_pages_to_xen-to-have-only-a-sing.patch
https://xenbits.xen.org/xsa/xsa345/0002-x86-mm-Refactor-modify_xen_mappings-to-have-one-exit.patch
https://xenbit
Bugzilla
CVE-2020-27672 xen: x86: race condition in Xen mapping code (XSA-345) [fedora-all]
bugzilla·2020-10-23·CVSS 7.0
CVE-2020-27672 [HIGH] CVE-2020-27672 xen: x86: race condition in Xen mapping code (XSA-345) [fedora-all]
CVE-2020-27672 xen: x86: race condition in Xen mapping code (XSA-345) [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 ver
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/2021/01/19/7http://xenbits.xen.org/xsa/advisory-345.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-345.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/2021/01/19/7http://xenbits.xen.org/xsa/advisory-345.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-345.html
2020-10-22
Published