UBUNTU-CVE-2021-27379
Dashboard / Vulnerabilities / UBUNTU-CVE-2021-27379
Summary:
Details: An issue was discovered in Xen through 4.11.x, allowing x86 Intel HVM guest OS users to achieve unintended read/write DMA access, and possibly cause a denial of service (host OS crash) or gain privileges. This occurs because a backport missed a flush, and thus IOMMU updates were not always correct. NOTE: this issue exists because of an incomplete fix for CVE-2020-15565.
References: https://ubuntu.com/security/CVE-2021-27379, https://xenbits.xen.org/xsa/advisory-366.html, https://www.cve.org/CVERecord?id=CVE-2021-27379
Affected packages
Package
Name: xen
Purl: pkg:deb/ubuntu/xen?arch=source&distro=xenial
Affected ranges
Type: ECOSYSTEM
Events:
Introduced- 0
Fixed -None
Affected versions
4.5.1-0ubuntu1
4.5.1-0ubuntu2
Common Vulnerability Scoring System
Attack Vector
Network
Adjacent
Local
Physical
Privileges Required
None
Low
High
User Interaction
None
Required
Scope
Unchanged
Changed
Confidentiality
None
Low
High
Integrity
None
Low
High
Availability
None
Low
High
