Home/CVE/An issue was discovered in Xen through 4.14.x allowing x86 guest OS users to cause a denial of service (data corruption)
CVE

CVE-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)

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.

HIGH · CVSS 7.8 EPSS 0.00044
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-345Insufficient Verification of Data Authenticity
▤

Affected Products & Versions

4
xen<= 4.14.0
opensuse leapall versions
fedoraproject fedoraall versions
debian linuxall versions
▣

Scoring & Timeline

7.8
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD22 Oct 2020 · 09:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
⚑

Vendor Advisories

17
suse-csafopenSUSE-SU-2024:11520-1
suse-csafSUSE-SU-2020:3742-1
suse-csafSUSE-SU-2020:14557-1
suse-csafopenSUSE-SU-2020:2192-1
suse-csafSUSE-SU-2020:3631-1
🔗

References & Sources

8
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.htmlMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.htmlMailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2021/01/19/9Mailing ListThird Party Advisory
http://xenbits.xen.org/xsa/advisory-347.htmlPatchVendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/
https://security.gentoo.org/glsa/202011-06Third Party Advisory
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