<p>Upgrade <code>Alpine:3.20</code> <code>xen</code> to version 4.15.1-r1 or higher.</p>

Improper Privilege Management Affecting xen package, versions <4.15.1-r1

Threat Intelligence

0.24% (65^th percentile)

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Snyk ID SNYK-ALPINE320-XEN-7012528
published 23 May 2024
disclosed 6 Oct 2021

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Introduced: 6 Oct 2021

CVE-2021-28702 Open this link in a new tab CWE-269 Open this link in a new tab

How to fix?

Upgrade Alpine:3.20 xen to version 4.15.1-r1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xen package and not the xen package as distributed by Alpine. See How to fix? for Alpine:3.20 relevant fixed versions and status.

PCI devices with RMRRs not deassigned correctly Certain PCI devices in a system might be assigned Reserved Memory Regions (specified via Reserved Memory Region Reporting, "RMRR"). These are typically used for platform tasks such as legacy USB emulation. If such a device is passed through to a guest, then on guest shutdown the device is not properly deassigned. The IOMMU configuration for these devices which are not properly deassigned ends up pointing to a freed data structure, including the IO Pagetables. Subsequent DMA or interrupts from the device will have unpredictable behaviour, ranging from IOMMU faults to memory corruption.

References

CVSS Scores

version 3.1

Attack Vector (AV)

Physical
Attack Complexity (AC)

Low
Privileges Required (PR)

None
User Interaction (UI)

None

Scope (S)

Changed

Confidentiality (C)

High
Integrity (I)

High
Availability (A)

High